Cândida Bertini - Academia.edu (original) (raw)
Papers by Cândida Bertini
DOAJ (DOAJ: Directory of Open Access Journals), Aug 1, 2022
Revista Brasileira de Engenharia Agrícola e Ambiental
Cowpea is a worldwide consumed legume due to its high nutrient concentrations. Selecting genotype... more Cowpea is a worldwide consumed legume due to its high nutrient concentrations. Selecting genotypes with high nutrient concentrations can contribute to developing biofortified cultivars. This study aimed to evaluate the nutritional potential and indicate genotypes of Vigna unguiculata for genetic improvement based on nutritional traits. Forty-three cowpea genotypes belonging to the Active Germplasm Bank of the Federal University of Ceará were used in the study. The analyses of dry matter, ash, ether extract, proteins, and minerals (phosphorus, potassium, calcium, magnesium, sulfur, sodium, copper, iron, zinc, manganese, and boron) were performed in triplicate. The data were subjected to analysis of variance, means comparison test, genetic parameters, nutritional quality indexes, and the sum of ranks. Genetic variances predominated concerning environmental variation for the nutrient concentrations of cowpea can be transmitted to future generations. The CE-0151, CE-0189, CE-0207, CE-02...
Revista Caatinga
Image analysis combined with machine learning models can be an excellent tool for classification ... more Image analysis combined with machine learning models can be an excellent tool for classification of fava (Phaseolus lunatus L.) genotypes and is a low-cost system. Fava is grown by family farmers, mainly, in the Northeast and South regions of Brazil, presenting economic and social importance. Evaluations to gather information on qualitative and quantitative characters of seeds enable the description and distinction of genotypes, allowing the evaluation of variability of plant species, which is essential in breeding programs. The use of image analysis is a fast and economic tool for obtaining large quantity of information. Machine learning techniques have been developed and implemented in the agricultural sector due to technological advances and increasing use of artificial intelligence, which enables the automatization of several processes. In this context, the objective of this work was to evaluate different machine learning models to classify fava genotypes, using data obtained th...
The Indian cherry (Malpighia emarginata) is a tropical fruit originated from American continent. ... more The Indian cherry (Malpighia emarginata) is a tropical fruit originated from American continent. In Brazilian orchards, there was high variability among cultivated genotypes. On the order hand, high variability allows the identification of superior genotypes for cropping industry. This study aimed to evaluate the genetic variability among 56 genotypes using ISSR (Inter Simple Sequence Repeats) primers. Leaf samples were collected in Pacajus-CE and taken to the laboratory of Molecular Biology postharvest, in Fortaleza. Altogether, 20 primers were used which yielded 148 polymorphic bands (79.57%), enabling the differentiation within the population study. As a result, this information may be used in future studies on breeding programs, such as choosing best combinations for parental crossings.A aceroleira (Malpighia emarginata) é uma frutífera tropical nativa da América Central e do Norte da América do Sul. Nos pomares brasileiros, observa-se alta variabilidade entre os genótipos culti...
Universidade Federal de Viçosa, Aug 10, 2004
Aos meus pais, Edison e Taeko, pelo amor incondicional em todos os momentos da minha vida. Ao meu... more Aos meus pais, Edison e Taeko, pelo amor incondicional em todos os momentos da minha vida. Ao meu noivo, José, pelo amor, apoio e compreensão sempre constantes. Aos meus irmãos, Marcos e Raquel, pelo amor e incentivo. A Profª. Dra. Andreia Barcelos Passos Lima pela orientação, amizade e confiança.
Agronomía Colombiana
The objective of this study was to evaluate and quantify the genetic divergence between accession... more The objective of this study was to evaluate and quantify the genetic divergence between accessions of cowpea, aiming to identify the characters that most contribute to diversity and select superior parents. Seventy-six cowpea accessions were evaluated using 19 descriptors that were also utilized to estimate genetic diversity using the Shannon-Weaver index. Phenology and production data were analyzed using descriptive statistics and were subjected to Pearson’s correlation test. The descriptors flower color, pod color, and seed brightness showed greater variability in the quantification of genetic diversity. The genotypes Das Almas, Galanjão, selected from CE-13, 7907-Purple Hull and Caupi Branco should be incorporated into cowpea breeding programs as they exhibit desirable agronomic characters. Crossings involving the genotype 7907-Purple Hull with Das Almas and Galanjão are indicated, which could result in obtaining superior genotypes in terms of precocity and grain yield.
Revista Ciência Agronômica, 2013
Phanerogam species reserve nutrients in their seeds in order to sustain propagation. Their chemic... more Phanerogam species reserve nutrients in their seeds in order to sustain propagation. Their chemical composition and the way the metabolites are used vary, according to genotype, the environment and the interaction between these factors. As the jatropha is considered a strategic oilseed crop in biofuel production, the aim of this work was to quantify the major reserve components (starch, protein, soluble sugar and lipid) of the jatropha seed and its disposition in the cells during different periods of germination, in order to understand the process of reserve mobilisation and to determine the potentially right time for the extraction of vegetable oil for that species. The seeds were soaked in water for 0; 12; 24; 36; 42; 45 and 48 hours, following a completely randomised design and evaluated for wet and dry biomass, chemical characteristics of the reserves and the disposition of the reserve compounds. Through research, it was observed that the levels of lipids increased up to 43% at ...
Bragantia, 2012
This study evaluated the relative contribution of agronomic and technological components on the f... more This study evaluated the relative contribution of agronomic and technological components on the fiber yield in upland cotton cultivars. The experiment was carried out with 11 upland cotton cultivars in a completely randomized blocks design with three replications. Initially, we performed analysis of variance, with the F test at 5% probability for the effect of cultivar as fixed effects as well as block and environment effects as random. Then the values were ordered according to cluster test Scott-Knott, at 5% probability level. The significance of the null hypothesis that all possible canonical correlations are null was evaluated using the chi-square test. The correlations were estimated through the path analysis. By examining the canonical correlations there was dependence between the two groups of variables and therefore it is possible to promote changes in certain characteristics through the selection of others correlated. Plants of upland cotton with higher fiber yield were infl...
Acta Scientiarum: Agronomy, 2010
Objetivou-se com esse trabalho avaliar a divergência genética de genótipos de feijãocaupi por mei... more Objetivou-se com esse trabalho avaliar a divergência genética de genótipos de feijãocaupi por meio de técnicas multivariadas e identificar aqueles que apresentam a melhor combinação para diferentes características por meio de índice de seleção. O experimento foi desenvolvido na Universidade Federal do Ceará, no período de fevereiro a junho de 2008, utilizando-se 47 genótipos de feijão-caupi de várias procedências. O experimento foi constituídode parcelas de uma fileira contendo oito plantas, sem repetição. Os caracteres avaliados foram o porte da planta; a posição da vagem na copa da planta; o número de vagens por planta; o comprimento das vagens; o número de sementes por vagem; o peso de 100 sementes e aprodução; o número de dias para a floração e o ciclo; a forma do grão e a cor do grão. A técnica multivariada de componentes principais, associada aos métodos de Tocher e de Distância Euclidiana Média, foi utilizada na avaliação da divergência genética. O índice de seleção de soma d...
O feijao-de-corda e uma das leguminosas mais adaptadas, versateis e nutritivas entre as especies ... more O feijao-de-corda e uma das leguminosas mais adaptadas, versateis e nutritivas entre as especies cultivadas, alem de apresentar grande importância para o desenvolvimento agricola da regiao Nordeste, tanto no aspecto economico quanto nutricional. Sendo assim, o objetivo deste trabalho foi caracterizar morfologicamente as plantas e vagens de diferentes variedades de feijao-de-corda coletados no estado do Ceara que sao resistentes ao pulgao-preto, uma das principais pragas desta cultura. Para tanto, foram caracterizados 24 variedades locais de feijao-de-corda provenientes de coletas realizadas a partir de pequenos produtores, feiras livres e mercados regionais. A pesquisa foi realizada na area da casa de vegetacao do Departamento de Fitotecnia do Centro de Ciencias Agrarias (CCA) da Universidade Federal do Ceara (UFC), localizada no Campus do Pici, em Fortaleza, de maio a setembro de 2016. Cada variedade foi caracterizada de acordo com os descritores qualitativos morfologicos: porte da...
Research, Society and Development, 2021
A fava (Phaseolus lunatus) possui uma ampla variabilidade genetica. Para explorar este potencial ... more A fava (Phaseolus lunatus) possui uma ampla variabilidade genetica. Para explorar este potencial sao empregados os descritores da cultura, que sao um conjunto de indicacoes tecnicas que auxiliam nos registros das informacoes das caracteristicas presente neste material genetico. No entanto, algumas informacoes presentes nos descritores necessitam ser atualizadas e outras adicionadas para que se possa descrever o maximo de caracteristicas. Assim, objetivou-se com essa pesquisa obter informacoes sobre os aspectos biometricos de sementes e plantas de fava que possam contribuir para estudos de divergencia genetica. Nesta pesquisa foram utilizadas 70 variedades de fava e foi dividida em duas etapas, na primeira, realizou-se a caracterizacao das sementes e na segunda, caracterizacao da planta, na fase vegetativa e reprodutiva. Aos dados aplicou-se estatistica descritiva para obtencao de porcentagem, media, desvio padrao, classes, histogramas, poligonos de frequencia e boxplots. Os resultad...
Nativa, 2021
O pinhão manso (Jatropha curcas L.) é uma euforbiácea utilizada na produção de biodiesel. A espéc... more O pinhão manso (Jatropha curcas L.) é uma euforbiácea utilizada na produção de biodiesel. A espécie possui base genética estreita o que dificulta o processo de lançamento de cultivares. Caracterizar precocemente os genótipos constitui etapa importante no melhoramento da cultura. Objetivou-se com este estudo realizar uma seleção precoce em caracteres morfoagronômicos, predizer o progresso genético de tais caracteres e indicar genitores potenciais para obtenção de progênies. O delineamento experimental utilizado foi o de blocos casualizados com 26 tratamentos e três repetições. As variáveis morfoagronômicas foram analisadas via modelos mistos e o progresso genético obtido pela seleção direta, indireta e índices de seleção. A dissimilaridade genética foi determinada pela distância de Mahalanobis, com agrupamento hierárquico UPGMA e coeficiente de correlação cofenética adquirido de 1.000 permutações. As estimativas demonstraram variabilidade genética, com identificação de genótipos juve...
Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences... more Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences of pods from the same harvest. Correction is made by the method of soaking pods and grains in water. This study verifies the need for moisture correction of fresh pods to estimate the yield of cowpea genotypes for production of green grains. Sixteen genotypes were evaluated for pod mass, grain mass, hundred grains mass, grain index, pod yield, and grain yield in two municipalities, Pentecoste and Marco, Ceara State, Brazil. For moisture correction, a sample of ten fresh pods was collected, weighed, and soaked in water. Samples were weighed until constant weight for wet mass. Subsequently, samples were dried in a forced air circulation oven and dry mass was obtained. Finally, a correlation study between the obtained data was performed. Correlation estimates were positive from low to medium magnitude. Correlations of greater magnitude were observed between fresh and dry masses. The origin...
A presente pesquisa teve como objetivo buscar novas fontes de resistencia ao pulgao-preto ( Aphis... more A presente pesquisa teve como objetivo buscar novas fontes de resistencia ao pulgao-preto ( Aphis craccivora ) em variedades locais de feijao-de-corda ( Vigna unguiculata ) e inferir qual mecanismos de resistencia poderiam estar envolvidos nesse processo de defesa da planta, bem como sugerir entre os materiais estudados as melhores combinacoes de cruzamentos para obtencao de hibridos superiores resistentes utilizando as analises, univariada e multivariada, como metodos estatisticos. O experimento foi realizado no Instituto Federal de Educacao, Ciencia e Tecnologia do Ceara, Umirim-CE, tendo sido conduzido em telado, com delineamento em blocos ao acaso, com quatro repeticoes e vinte e quatro tratamentos e adicionados quatro genotipos padroes com resistencia conhecida. Para avaliar a resistencia dos genotipos, as variaveis utilizadas foram numero de adultos vivos e numero de ninfas vivas. Os resultados indicaram que a analise multivariada apresenta resultados semelhantes a analise uni...
Cowpea is grown in the various soil and climatic conditions of the Northeast region of Brazil. Th... more Cowpea is grown in the various soil and climatic conditions of the Northeast region of Brazil. Thus, selecting and developing cultivars with high yield, stability, and adaptability for this region is necessary due to the genotype × environment interaction. The objective of this work was to select cowpea lines of semi-erect plant simultaneously for high yield, adaptability, and genotypic stability in the Northeast region of Brazil by the REML/BLUP procedure. Twenty semi-erect genotypes— 15 lines and five cultivars—were evaluated in 37 environments of the Northeast region from 2013-2015. The experiments were carried out under rainfed conditions in a randomized complete block design with four replications. The adaptability and genotypic stability were evaluated by the REML/BLUP procedure. The environmental variance was the largest factor in the phenotypic variance and the genotype × environment interaction was complex-type, with a grain yield ranging from 277 kg ha -1 (Serra Talhada PE...
Resumen pt: O objetivo deste trabalho foi caracterizar a variabilidade genetica de caracteres agr... more Resumen pt: O objetivo deste trabalho foi caracterizar a variabilidade genetica de caracteres agronomicos e botânicos e quantifi car a divergencia genetica entre ace...
Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences... more Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences of pods from the same harvest. Correction is made by the method of soaking pods and grains in water. This study verifies the need for moisture correction of fresh pods to estimate the yield of cowpea genotypes for production of green grains. Sixteen genotypes were evaluated for pod mass, grain mass, hundred grains mass, grain index, pod yield, and grain yield in two municipalities, Pentecoste and Marco, Ceará State, Brazil. For moisture correction, a sample of ten fresh pods was collected, weighed, and soaked in water. Samples were weighed until constant weight for wet mass. Subsequently, samples were dried in a forced air circulation oven and dry mass was obtained. Finally, a correlation study between the obtained data was performed. Correlation estimates were positive from low to medium magnitude. Correlations of greater magnitude were observed between fresh and dry masses. The origin...
DOAJ (DOAJ: Directory of Open Access Journals), Aug 1, 2022
Revista Brasileira de Engenharia Agrícola e Ambiental
Cowpea is a worldwide consumed legume due to its high nutrient concentrations. Selecting genotype... more Cowpea is a worldwide consumed legume due to its high nutrient concentrations. Selecting genotypes with high nutrient concentrations can contribute to developing biofortified cultivars. This study aimed to evaluate the nutritional potential and indicate genotypes of Vigna unguiculata for genetic improvement based on nutritional traits. Forty-three cowpea genotypes belonging to the Active Germplasm Bank of the Federal University of Ceará were used in the study. The analyses of dry matter, ash, ether extract, proteins, and minerals (phosphorus, potassium, calcium, magnesium, sulfur, sodium, copper, iron, zinc, manganese, and boron) were performed in triplicate. The data were subjected to analysis of variance, means comparison test, genetic parameters, nutritional quality indexes, and the sum of ranks. Genetic variances predominated concerning environmental variation for the nutrient concentrations of cowpea can be transmitted to future generations. The CE-0151, CE-0189, CE-0207, CE-02...
Revista Caatinga
Image analysis combined with machine learning models can be an excellent tool for classification ... more Image analysis combined with machine learning models can be an excellent tool for classification of fava (Phaseolus lunatus L.) genotypes and is a low-cost system. Fava is grown by family farmers, mainly, in the Northeast and South regions of Brazil, presenting economic and social importance. Evaluations to gather information on qualitative and quantitative characters of seeds enable the description and distinction of genotypes, allowing the evaluation of variability of plant species, which is essential in breeding programs. The use of image analysis is a fast and economic tool for obtaining large quantity of information. Machine learning techniques have been developed and implemented in the agricultural sector due to technological advances and increasing use of artificial intelligence, which enables the automatization of several processes. In this context, the objective of this work was to evaluate different machine learning models to classify fava genotypes, using data obtained th...
The Indian cherry (Malpighia emarginata) is a tropical fruit originated from American continent. ... more The Indian cherry (Malpighia emarginata) is a tropical fruit originated from American continent. In Brazilian orchards, there was high variability among cultivated genotypes. On the order hand, high variability allows the identification of superior genotypes for cropping industry. This study aimed to evaluate the genetic variability among 56 genotypes using ISSR (Inter Simple Sequence Repeats) primers. Leaf samples were collected in Pacajus-CE and taken to the laboratory of Molecular Biology postharvest, in Fortaleza. Altogether, 20 primers were used which yielded 148 polymorphic bands (79.57%), enabling the differentiation within the population study. As a result, this information may be used in future studies on breeding programs, such as choosing best combinations for parental crossings.A aceroleira (Malpighia emarginata) é uma frutífera tropical nativa da América Central e do Norte da América do Sul. Nos pomares brasileiros, observa-se alta variabilidade entre os genótipos culti...
Universidade Federal de Viçosa, Aug 10, 2004
Aos meus pais, Edison e Taeko, pelo amor incondicional em todos os momentos da minha vida. Ao meu... more Aos meus pais, Edison e Taeko, pelo amor incondicional em todos os momentos da minha vida. Ao meu noivo, José, pelo amor, apoio e compreensão sempre constantes. Aos meus irmãos, Marcos e Raquel, pelo amor e incentivo. A Profª. Dra. Andreia Barcelos Passos Lima pela orientação, amizade e confiança.
Agronomía Colombiana
The objective of this study was to evaluate and quantify the genetic divergence between accession... more The objective of this study was to evaluate and quantify the genetic divergence between accessions of cowpea, aiming to identify the characters that most contribute to diversity and select superior parents. Seventy-six cowpea accessions were evaluated using 19 descriptors that were also utilized to estimate genetic diversity using the Shannon-Weaver index. Phenology and production data were analyzed using descriptive statistics and were subjected to Pearson’s correlation test. The descriptors flower color, pod color, and seed brightness showed greater variability in the quantification of genetic diversity. The genotypes Das Almas, Galanjão, selected from CE-13, 7907-Purple Hull and Caupi Branco should be incorporated into cowpea breeding programs as they exhibit desirable agronomic characters. Crossings involving the genotype 7907-Purple Hull with Das Almas and Galanjão are indicated, which could result in obtaining superior genotypes in terms of precocity and grain yield.
Revista Ciência Agronômica, 2013
Phanerogam species reserve nutrients in their seeds in order to sustain propagation. Their chemic... more Phanerogam species reserve nutrients in their seeds in order to sustain propagation. Their chemical composition and the way the metabolites are used vary, according to genotype, the environment and the interaction between these factors. As the jatropha is considered a strategic oilseed crop in biofuel production, the aim of this work was to quantify the major reserve components (starch, protein, soluble sugar and lipid) of the jatropha seed and its disposition in the cells during different periods of germination, in order to understand the process of reserve mobilisation and to determine the potentially right time for the extraction of vegetable oil for that species. The seeds were soaked in water for 0; 12; 24; 36; 42; 45 and 48 hours, following a completely randomised design and evaluated for wet and dry biomass, chemical characteristics of the reserves and the disposition of the reserve compounds. Through research, it was observed that the levels of lipids increased up to 43% at ...
Bragantia, 2012
This study evaluated the relative contribution of agronomic and technological components on the f... more This study evaluated the relative contribution of agronomic and technological components on the fiber yield in upland cotton cultivars. The experiment was carried out with 11 upland cotton cultivars in a completely randomized blocks design with three replications. Initially, we performed analysis of variance, with the F test at 5% probability for the effect of cultivar as fixed effects as well as block and environment effects as random. Then the values were ordered according to cluster test Scott-Knott, at 5% probability level. The significance of the null hypothesis that all possible canonical correlations are null was evaluated using the chi-square test. The correlations were estimated through the path analysis. By examining the canonical correlations there was dependence between the two groups of variables and therefore it is possible to promote changes in certain characteristics through the selection of others correlated. Plants of upland cotton with higher fiber yield were infl...
Acta Scientiarum: Agronomy, 2010
Objetivou-se com esse trabalho avaliar a divergência genética de genótipos de feijãocaupi por mei... more Objetivou-se com esse trabalho avaliar a divergência genética de genótipos de feijãocaupi por meio de técnicas multivariadas e identificar aqueles que apresentam a melhor combinação para diferentes características por meio de índice de seleção. O experimento foi desenvolvido na Universidade Federal do Ceará, no período de fevereiro a junho de 2008, utilizando-se 47 genótipos de feijão-caupi de várias procedências. O experimento foi constituídode parcelas de uma fileira contendo oito plantas, sem repetição. Os caracteres avaliados foram o porte da planta; a posição da vagem na copa da planta; o número de vagens por planta; o comprimento das vagens; o número de sementes por vagem; o peso de 100 sementes e aprodução; o número de dias para a floração e o ciclo; a forma do grão e a cor do grão. A técnica multivariada de componentes principais, associada aos métodos de Tocher e de Distância Euclidiana Média, foi utilizada na avaliação da divergência genética. O índice de seleção de soma d...
O feijao-de-corda e uma das leguminosas mais adaptadas, versateis e nutritivas entre as especies ... more O feijao-de-corda e uma das leguminosas mais adaptadas, versateis e nutritivas entre as especies cultivadas, alem de apresentar grande importância para o desenvolvimento agricola da regiao Nordeste, tanto no aspecto economico quanto nutricional. Sendo assim, o objetivo deste trabalho foi caracterizar morfologicamente as plantas e vagens de diferentes variedades de feijao-de-corda coletados no estado do Ceara que sao resistentes ao pulgao-preto, uma das principais pragas desta cultura. Para tanto, foram caracterizados 24 variedades locais de feijao-de-corda provenientes de coletas realizadas a partir de pequenos produtores, feiras livres e mercados regionais. A pesquisa foi realizada na area da casa de vegetacao do Departamento de Fitotecnia do Centro de Ciencias Agrarias (CCA) da Universidade Federal do Ceara (UFC), localizada no Campus do Pici, em Fortaleza, de maio a setembro de 2016. Cada variedade foi caracterizada de acordo com os descritores qualitativos morfologicos: porte da...
Research, Society and Development, 2021
A fava (Phaseolus lunatus) possui uma ampla variabilidade genetica. Para explorar este potencial ... more A fava (Phaseolus lunatus) possui uma ampla variabilidade genetica. Para explorar este potencial sao empregados os descritores da cultura, que sao um conjunto de indicacoes tecnicas que auxiliam nos registros das informacoes das caracteristicas presente neste material genetico. No entanto, algumas informacoes presentes nos descritores necessitam ser atualizadas e outras adicionadas para que se possa descrever o maximo de caracteristicas. Assim, objetivou-se com essa pesquisa obter informacoes sobre os aspectos biometricos de sementes e plantas de fava que possam contribuir para estudos de divergencia genetica. Nesta pesquisa foram utilizadas 70 variedades de fava e foi dividida em duas etapas, na primeira, realizou-se a caracterizacao das sementes e na segunda, caracterizacao da planta, na fase vegetativa e reprodutiva. Aos dados aplicou-se estatistica descritiva para obtencao de porcentagem, media, desvio padrao, classes, histogramas, poligonos de frequencia e boxplots. Os resultad...
Nativa, 2021
O pinhão manso (Jatropha curcas L.) é uma euforbiácea utilizada na produção de biodiesel. A espéc... more O pinhão manso (Jatropha curcas L.) é uma euforbiácea utilizada na produção de biodiesel. A espécie possui base genética estreita o que dificulta o processo de lançamento de cultivares. Caracterizar precocemente os genótipos constitui etapa importante no melhoramento da cultura. Objetivou-se com este estudo realizar uma seleção precoce em caracteres morfoagronômicos, predizer o progresso genético de tais caracteres e indicar genitores potenciais para obtenção de progênies. O delineamento experimental utilizado foi o de blocos casualizados com 26 tratamentos e três repetições. As variáveis morfoagronômicas foram analisadas via modelos mistos e o progresso genético obtido pela seleção direta, indireta e índices de seleção. A dissimilaridade genética foi determinada pela distância de Mahalanobis, com agrupamento hierárquico UPGMA e coeficiente de correlação cofenética adquirido de 1.000 permutações. As estimativas demonstraram variabilidade genética, com identificação de genótipos juve...
Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences... more Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences of pods from the same harvest. Correction is made by the method of soaking pods and grains in water. This study verifies the need for moisture correction of fresh pods to estimate the yield of cowpea genotypes for production of green grains. Sixteen genotypes were evaluated for pod mass, grain mass, hundred grains mass, grain index, pod yield, and grain yield in two municipalities, Pentecoste and Marco, Ceara State, Brazil. For moisture correction, a sample of ten fresh pods was collected, weighed, and soaked in water. Samples were weighed until constant weight for wet mass. Subsequently, samples were dried in a forced air circulation oven and dry mass was obtained. Finally, a correlation study between the obtained data was performed. Correlation estimates were positive from low to medium magnitude. Correlations of greater magnitude were observed between fresh and dry masses. The origin...
A presente pesquisa teve como objetivo buscar novas fontes de resistencia ao pulgao-preto ( Aphis... more A presente pesquisa teve como objetivo buscar novas fontes de resistencia ao pulgao-preto ( Aphis craccivora ) em variedades locais de feijao-de-corda ( Vigna unguiculata ) e inferir qual mecanismos de resistencia poderiam estar envolvidos nesse processo de defesa da planta, bem como sugerir entre os materiais estudados as melhores combinacoes de cruzamentos para obtencao de hibridos superiores resistentes utilizando as analises, univariada e multivariada, como metodos estatisticos. O experimento foi realizado no Instituto Federal de Educacao, Ciencia e Tecnologia do Ceara, Umirim-CE, tendo sido conduzido em telado, com delineamento em blocos ao acaso, com quatro repeticoes e vinte e quatro tratamentos e adicionados quatro genotipos padroes com resistencia conhecida. Para avaliar a resistencia dos genotipos, as variaveis utilizadas foram numero de adultos vivos e numero de ninfas vivas. Os resultados indicaram que a analise multivariada apresenta resultados semelhantes a analise uni...
Cowpea is grown in the various soil and climatic conditions of the Northeast region of Brazil. Th... more Cowpea is grown in the various soil and climatic conditions of the Northeast region of Brazil. Thus, selecting and developing cultivars with high yield, stability, and adaptability for this region is necessary due to the genotype × environment interaction. The objective of this work was to select cowpea lines of semi-erect plant simultaneously for high yield, adaptability, and genotypic stability in the Northeast region of Brazil by the REML/BLUP procedure. Twenty semi-erect genotypes— 15 lines and five cultivars—were evaluated in 37 environments of the Northeast region from 2013-2015. The experiments were carried out under rainfed conditions in a randomized complete block design with four replications. The adaptability and genotypic stability were evaluated by the REML/BLUP procedure. The environmental variance was the largest factor in the phenotypic variance and the genotype × environment interaction was complex-type, with a grain yield ranging from 277 kg ha -1 (Serra Talhada PE...
Resumen pt: O objetivo deste trabalho foi caracterizar a variabilidade genetica de caracteres agr... more Resumen pt: O objetivo deste trabalho foi caracterizar a variabilidade genetica de caracteres agronomicos e botânicos e quantifi car a divergencia genetica entre ace...
Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences... more Moisture correction of fresh pods of cowpea genotypes has been used to correct weight differences of pods from the same harvest. Correction is made by the method of soaking pods and grains in water. This study verifies the need for moisture correction of fresh pods to estimate the yield of cowpea genotypes for production of green grains. Sixteen genotypes were evaluated for pod mass, grain mass, hundred grains mass, grain index, pod yield, and grain yield in two municipalities, Pentecoste and Marco, Ceará State, Brazil. For moisture correction, a sample of ten fresh pods was collected, weighed, and soaked in water. Samples were weighed until constant weight for wet mass. Subsequently, samples were dried in a forced air circulation oven and dry mass was obtained. Finally, a correlation study between the obtained data was performed. Correlation estimates were positive from low to medium magnitude. Correlations of greater magnitude were observed between fresh and dry masses. The origin...