Bi Irie Zoro - Academia.edu (original) (raw)

Papers by Bi Irie Zoro

Research paper thumbnail of Inheritance and relationship between key agronomic and quality traits in an interspecific cross between Coffea pseudozanguebariae Bridson and C. canephora Pierre

Tree Genetics & Genomes, 2012

ABSTRACT The inheritance and relationships between four traits of agronomic and quality interest-... more ABSTRACT The inheritance and relationships between four traits of agronomic and quality interest-fructification time, caffeine, and heteroside contents and 100-bean weight-were analyzed in the first backcross hybrids derived from an interspecific cross between Coffea pseudozanguebariae and Coffea canephora. We showed that short vs. long fructification time was governed by one major gene with two co-dominant alleles ft1 and ft2. Absence vs. presence of both caffeine and heteroside was also controlled by one major gene. The allele responsible for the presence of caffeine (caf2) dominated over the absence one (caf1) whereas both alleles controlling heteroside, het1 and het2, were co-dominant. The fructification time and the heteroside content were additive while the caffeine content seemed multiplicative. The 100-bean weight was additive and under a polygenic control. The two genes ft and caf were linked, separated by 30.8 cM, and were independent from the het gene. The relationships between the four traits were not strong enough, except between 100-bean weight and fructification time (r = 0.43) or caffeine content (r = 0.41). Recombination occurred between the genes controlling the four traits suggesting that new introgressed Robusta varieties, characterized by short, medium, or long fructification time depending on demand, bigger seeds with low or no caffeine content, and being heteroside-free, could be produced.

Research paper thumbnail of Entomofaune associée à la culture de cucurbites oléagineuses africaines (Lagenaria sicerariaMolina (Standl. 1930) etCitrullus lanatusThumb (Matsum & Nakai 1916)) et impact des ravageurs sur la production

Annales de la Société entomologique de France (N.S.), 2014

ABSTRACT Les observations faites sur deux cucurbitacées africaines, Lagenaria siceraria Molina (S... more ABSTRACT Les observations faites sur deux cucurbitacées africaines, Lagenaria siceraria Molina (Standl.) et Citrullus lanatus Thumb (Matsum & Nakai) ont permis d’inventorier l’entomofaune (utiles et ravageurs) associée à la pratique culturale. L’évaluation des dégâts occasionnés par les ravageurs a mis en évidence leur impact sur la production. Suivant un schéma expérimental, des parcelles de 49 m2 traitées au CYPERCAL 50 EC (50 g/l de Cypermétrine) et au FURADAN 5G (50 g/kg de Carbofuran) et non traitées ont été disposées en blocs aléatoires. Les observations ont porté sur l’identification et le dénombrement des insectes, sur le pourcentage de plants attaqués ainsi que sur la production de baies mûres et de graines. Au total, 71 espèces ont été identifiées, réparties en 41 familles et 10 ordres (Coléoptères, Hyménoptères, Diptères, Lépidoptères, Orthoptères, Homoptères, Hétéroptères, Dictyoptères, Odonates et Dermaptères). Les principaux ravageurs appartiennent à la famille des Chrysomelidae (Lamprocopa occidentalis, Aulacophora foveicolis, Aulacophora africana, Asbecesta cyanipennis, Ootheca mutabilis et Lilioceris livida), des Coccinellidae (Henosepilachna elaterii et Henosepilachna reticulata) et des Meloidae (Mylabris holosericea). Plus de 50 % de plants sains ont été recensés dans les parcelles traitées contre 0 à 33 % dans les parcelles témoins. Les nombres moyens des baies obtenues dans les parcelles traitées (37,16 ± 2,99 pour L. siceraria et 42,33 ± 2,58 pour C. lanatus) sont significativement (P L. siceraria et 31,33 ± 3,5 pour C. lanatus). Les rendements moyens en graines dans les parcelles traitées (222,39 ± 15,78 kg/ha pour L. siceraria et 127,4 ± 8,16 kg/ha pour C. lanatus) sont significativement (P L. siceraria et 88,18 ± 8,09 kg/ha pour C. lanatus). Les traitements insecticides, en réduisant les populations de ravageurs et les dégâts sur les plants, ont entrainé une augmentation du rendement à l’hectare de plus de 40 %.

Research paper thumbnail of Effect of harvest time on seed oil and protein contents and compositions in the oleaginous gourd Lagenaria siceraria (Molina) Standl

Journal of the Science of Food and Agriculture, 2011

BACKGROU ND: The stage of fruit ripeness at the time of harvest determines the final quality of r... more BACKGROU ND: The stage of fruit ripeness at the time of harvest determines the final quality of ripe fruit. In this study, changes in the chemical composition of seed kernels from the oleaginous gourd Lagenaria siceraria (Molina) Standl. during maturation were evaluated to determine the best time to harvest the berries. Two cultivars (round and oval berry) were studied at three maturation stages (30 and 50 days after fruit set (DAFS) and complete plant whiteness (CPW)). RESULTS: Seed kernels were rich in oil (527.2-544.6 g kg-1), protein (402.8-403.3 g kg-1), minerals and energy. Maturation influenced the chemical compounds of the two cultivars differently. Best quantities of these components were reached at 50 DAFS. However, protein bioavailability was better at 30 DAFS and CPW in the round and oval berry cultivars respectively. Lagenaria siceraria oils were of good quality, containing an abundance of essential fatty acids (647.2-667.0 g kg-1). CONCLUSION: Both cultivars of L. siceraria should be harvested at 50 DAFS owing to the good nutritional properties of their seeds and oils. However, to obtain best-quality proteins, round and oval berry cultivars should be harvested at 30 DAFS and CPW respectively. The results of this study will be useful in reducing the production time of fruits and improving the nutritional quality of their seeds,

Research paper thumbnail of Effects of Fruit Maturity on Oxidative Stability of Lagenaria Siceraria (Molina) Standl. Seed Oil Extracted with Hexane

Journal of Food Biochemistry, 2012

The effects of fruit maturity on oxidative stability of LSO were investigated using an accelerate... more The effects of fruit maturity on oxidative stability of LSO were investigated using an accelerated test at 60C for 6 days. Fatty acid composition, Cox, PV, p-AV, specific extinction at 232 and 268 nm, and TOTOX were used to assess LSO stability. LSO samples from berry seeds at 50-DAFS, at CPW and at CPW + S60 were analyzed. LSO at CPW was significantly more stable to oxidation than LSO at 50-DAFS and CPW + S60. This oil had lower p-AV than control (peanut oil) and other sources of LSO. PV, specific extinction, TOTOX and Cox of LSO at CPW were also lower than those of 50-DAFS and CPW + S60, but two times higher than control values. Collectively, these data suggest that LSO cannot be used after 3 days of storage at 60C.

Research paper thumbnail of Diversite Morphologique Des Varietes Locales De Maïs (Zea Mays L.) Collectees Au Centre et Centre-Ouest De La Cote D’Ivoire

Morphological characterization is a first approach to the study of genetic diversity. Nine hundre... more Morphological characterization is a first approach to the study of genetic diversity. Nine hundred twenty maize accessions collected in the center and center-west of Côte d'Ivoire, were evaluated morphologically in a block randomized design. Thirteen morphological descriptors were used in this study. The descriptive analysis revealed a significant diversity among accessions, marked by a significant gap between the minimum and maximum values. The principal components analysis summarized the information contained in the thirteen variables into 3 components that render 78.28% of the total variance. The hierarchical clustering allowed us to distinguish two main groups based on early and plant height. Each group was subdivided into 4 subgroups. Descriptive discriminant analysis showed that eight variables (days to 50% pollen shedding, days to 50% silking, plant height, ear height, leaf number, number of kernels per row, length of ears), contribute most to discriminate the different s...

Research paper thumbnail of Effect of harvest time on germination power, seedlings vigour and yield of the oleaginous gourd Lagenaria siceraria seed in the rainforest of Côte d’Ivoire

The ripeness stage of Lagenaria siceraria (Molina) Standl fruit at the time of harvest is a very ... more The ripeness stage of Lagenaria siceraria (Molina) Standl fruit at the time of harvest is a very important factor, which determines seed quality and yield. The purpose of the current study was to determine the best harvest time of L. siceraria berries for high quality seed. Two cultivars of L. siceraria (round- and oval-berry) were used. Three maturity stages, 30 days after fruit set (30 DAFS), 50 days after fruit set (50 DAFS) and at complete plant wilting (CPW) were considered. Three experimentations were conducted: the production of berries at different ripening levels, the germination power of seeds and the seedling vigour, and the agronomic performance of plants. The results showed that the seeds from berries harvested at 50 DAFS and at CPW present the best agronomic characters. When the berries of both cultivars had reached the stage 50 DAFS and CPW, their seeds had the highest total seed weight (39.46 - 52.72 g) and germination percentage (88.7 to 89.5 %). These seeds produce...

Research paper thumbnail of Effects of seed fermentation method on seed germination and vigor in the oleaginous gourd Lagenaria siceraria (Molina) Standl

AFRICAN JOURNAL OF BIOTECHNOLOGY

Supplying high quality seed to rural farmers is the basic requirement for the sustainable develop... more Supplying high quality seed to rural farmers is the basic requirement for the sustainable development of agriculture in developing countries. The present study was conducted to examine the influence of Lagenaria siceraria seed fermentation method on seed germination and vigor. Three seed fermentation methods (fermented in ambient air, plastic bag stored in ambient or in plastic bag buried) were tested on two cultivars during two years. Seed germination and vigor were better when fermentation was conducted in anaerobic, darkness, and at low temperature. Low seed quality was observed in unfermented seed, suggesting the occurrence of postharvest maturity in L. siceraria. Seed quality did not vary between cultivars. Regardless of the fermentation process and cultivars used, the best seed and seedling qualities were observed when the amount of rainfall during the experiment period was high, suggesting that wet soil is necessary for an on farm reliable evaluation of seed fermentation method in the bottle gourd L. siceraria.

Research paper thumbnail of Inheritance and relationship between key agronomic and quality traits in an interspecific cross between Coffea pseudozanguebariae Bridson and C. canephora Pierre

Tree Genetics & Genomes, 2012

ABSTRACT The inheritance and relationships between four traits of agronomic and quality interest-... more ABSTRACT The inheritance and relationships between four traits of agronomic and quality interest-fructification time, caffeine, and heteroside contents and 100-bean weight-were analyzed in the first backcross hybrids derived from an interspecific cross between Coffea pseudozanguebariae and Coffea canephora. We showed that short vs. long fructification time was governed by one major gene with two co-dominant alleles ft1 and ft2. Absence vs. presence of both caffeine and heteroside was also controlled by one major gene. The allele responsible for the presence of caffeine (caf2) dominated over the absence one (caf1) whereas both alleles controlling heteroside, het1 and het2, were co-dominant. The fructification time and the heteroside content were additive while the caffeine content seemed multiplicative. The 100-bean weight was additive and under a polygenic control. The two genes ft and caf were linked, separated by 30.8 cM, and were independent from the het gene. The relationships between the four traits were not strong enough, except between 100-bean weight and fructification time (r = 0.43) or caffeine content (r = 0.41). Recombination occurred between the genes controlling the four traits suggesting that new introgressed Robusta varieties, characterized by short, medium, or long fructification time depending on demand, bigger seeds with low or no caffeine content, and being heteroside-free, could be produced.

Research paper thumbnail of Entomofaune associée à la culture de cucurbites oléagineuses africaines (Lagenaria sicerariaMolina (Standl. 1930) etCitrullus lanatusThumb (Matsum & Nakai 1916)) et impact des ravageurs sur la production

Annales de la Société entomologique de France (N.S.), 2014

ABSTRACT Les observations faites sur deux cucurbitacées africaines, Lagenaria siceraria Molina (S... more ABSTRACT Les observations faites sur deux cucurbitacées africaines, Lagenaria siceraria Molina (Standl.) et Citrullus lanatus Thumb (Matsum & Nakai) ont permis d’inventorier l’entomofaune (utiles et ravageurs) associée à la pratique culturale. L’évaluation des dégâts occasionnés par les ravageurs a mis en évidence leur impact sur la production. Suivant un schéma expérimental, des parcelles de 49 m2 traitées au CYPERCAL 50 EC (50 g/l de Cypermétrine) et au FURADAN 5G (50 g/kg de Carbofuran) et non traitées ont été disposées en blocs aléatoires. Les observations ont porté sur l’identification et le dénombrement des insectes, sur le pourcentage de plants attaqués ainsi que sur la production de baies mûres et de graines. Au total, 71 espèces ont été identifiées, réparties en 41 familles et 10 ordres (Coléoptères, Hyménoptères, Diptères, Lépidoptères, Orthoptères, Homoptères, Hétéroptères, Dictyoptères, Odonates et Dermaptères). Les principaux ravageurs appartiennent à la famille des Chrysomelidae (Lamprocopa occidentalis, Aulacophora foveicolis, Aulacophora africana, Asbecesta cyanipennis, Ootheca mutabilis et Lilioceris livida), des Coccinellidae (Henosepilachna elaterii et Henosepilachna reticulata) et des Meloidae (Mylabris holosericea). Plus de 50 % de plants sains ont été recensés dans les parcelles traitées contre 0 à 33 % dans les parcelles témoins. Les nombres moyens des baies obtenues dans les parcelles traitées (37,16 ± 2,99 pour L. siceraria et 42,33 ± 2,58 pour C. lanatus) sont significativement (P L. siceraria et 31,33 ± 3,5 pour C. lanatus). Les rendements moyens en graines dans les parcelles traitées (222,39 ± 15,78 kg/ha pour L. siceraria et 127,4 ± 8,16 kg/ha pour C. lanatus) sont significativement (P L. siceraria et 88,18 ± 8,09 kg/ha pour C. lanatus). Les traitements insecticides, en réduisant les populations de ravageurs et les dégâts sur les plants, ont entrainé une augmentation du rendement à l’hectare de plus de 40 %.

Research paper thumbnail of Effect of harvest time on seed oil and protein contents and compositions in the oleaginous gourd Lagenaria siceraria (Molina) Standl

Journal of the Science of Food and Agriculture, 2011

BACKGROU ND: The stage of fruit ripeness at the time of harvest determines the final quality of r... more BACKGROU ND: The stage of fruit ripeness at the time of harvest determines the final quality of ripe fruit. In this study, changes in the chemical composition of seed kernels from the oleaginous gourd Lagenaria siceraria (Molina) Standl. during maturation were evaluated to determine the best time to harvest the berries. Two cultivars (round and oval berry) were studied at three maturation stages (30 and 50 days after fruit set (DAFS) and complete plant whiteness (CPW)). RESULTS: Seed kernels were rich in oil (527.2-544.6 g kg-1), protein (402.8-403.3 g kg-1), minerals and energy. Maturation influenced the chemical compounds of the two cultivars differently. Best quantities of these components were reached at 50 DAFS. However, protein bioavailability was better at 30 DAFS and CPW in the round and oval berry cultivars respectively. Lagenaria siceraria oils were of good quality, containing an abundance of essential fatty acids (647.2-667.0 g kg-1). CONCLUSION: Both cultivars of L. siceraria should be harvested at 50 DAFS owing to the good nutritional properties of their seeds and oils. However, to obtain best-quality proteins, round and oval berry cultivars should be harvested at 30 DAFS and CPW respectively. The results of this study will be useful in reducing the production time of fruits and improving the nutritional quality of their seeds,

Research paper thumbnail of Effects of Fruit Maturity on Oxidative Stability of Lagenaria Siceraria (Molina) Standl. Seed Oil Extracted with Hexane

Journal of Food Biochemistry, 2012

The effects of fruit maturity on oxidative stability of LSO were investigated using an accelerate... more The effects of fruit maturity on oxidative stability of LSO were investigated using an accelerated test at 60C for 6 days. Fatty acid composition, Cox, PV, p-AV, specific extinction at 232 and 268 nm, and TOTOX were used to assess LSO stability. LSO samples from berry seeds at 50-DAFS, at CPW and at CPW + S60 were analyzed. LSO at CPW was significantly more stable to oxidation than LSO at 50-DAFS and CPW + S60. This oil had lower p-AV than control (peanut oil) and other sources of LSO. PV, specific extinction, TOTOX and Cox of LSO at CPW were also lower than those of 50-DAFS and CPW + S60, but two times higher than control values. Collectively, these data suggest that LSO cannot be used after 3 days of storage at 60C.

Research paper thumbnail of Diversite Morphologique Des Varietes Locales De Maïs (Zea Mays L.) Collectees Au Centre et Centre-Ouest De La Cote D’Ivoire

Morphological characterization is a first approach to the study of genetic diversity. Nine hundre... more Morphological characterization is a first approach to the study of genetic diversity. Nine hundred twenty maize accessions collected in the center and center-west of Côte d'Ivoire, were evaluated morphologically in a block randomized design. Thirteen morphological descriptors were used in this study. The descriptive analysis revealed a significant diversity among accessions, marked by a significant gap between the minimum and maximum values. The principal components analysis summarized the information contained in the thirteen variables into 3 components that render 78.28% of the total variance. The hierarchical clustering allowed us to distinguish two main groups based on early and plant height. Each group was subdivided into 4 subgroups. Descriptive discriminant analysis showed that eight variables (days to 50% pollen shedding, days to 50% silking, plant height, ear height, leaf number, number of kernels per row, length of ears), contribute most to discriminate the different s...

Research paper thumbnail of Effect of harvest time on germination power, seedlings vigour and yield of the oleaginous gourd Lagenaria siceraria seed in the rainforest of Côte d’Ivoire

The ripeness stage of Lagenaria siceraria (Molina) Standl fruit at the time of harvest is a very ... more The ripeness stage of Lagenaria siceraria (Molina) Standl fruit at the time of harvest is a very important factor, which determines seed quality and yield. The purpose of the current study was to determine the best harvest time of L. siceraria berries for high quality seed. Two cultivars of L. siceraria (round- and oval-berry) were used. Three maturity stages, 30 days after fruit set (30 DAFS), 50 days after fruit set (50 DAFS) and at complete plant wilting (CPW) were considered. Three experimentations were conducted: the production of berries at different ripening levels, the germination power of seeds and the seedling vigour, and the agronomic performance of plants. The results showed that the seeds from berries harvested at 50 DAFS and at CPW present the best agronomic characters. When the berries of both cultivars had reached the stage 50 DAFS and CPW, their seeds had the highest total seed weight (39.46 - 52.72 g) and germination percentage (88.7 to 89.5 %). These seeds produce...

Research paper thumbnail of Effects of seed fermentation method on seed germination and vigor in the oleaginous gourd Lagenaria siceraria (Molina) Standl

AFRICAN JOURNAL OF BIOTECHNOLOGY

Supplying high quality seed to rural farmers is the basic requirement for the sustainable develop... more Supplying high quality seed to rural farmers is the basic requirement for the sustainable development of agriculture in developing countries. The present study was conducted to examine the influence of Lagenaria siceraria seed fermentation method on seed germination and vigor. Three seed fermentation methods (fermented in ambient air, plastic bag stored in ambient or in plastic bag buried) were tested on two cultivars during two years. Seed germination and vigor were better when fermentation was conducted in anaerobic, darkness, and at low temperature. Low seed quality was observed in unfermented seed, suggesting the occurrence of postharvest maturity in L. siceraria. Seed quality did not vary between cultivars. Regardless of the fermentation process and cultivars used, the best seed and seedling qualities were observed when the amount of rainfall during the experiment period was high, suggesting that wet soil is necessary for an on farm reliable evaluation of seed fermentation method in the bottle gourd L. siceraria.