Ikechukwu Agbagwa | University of Port Harcourt (original) (raw)
Papers by Ikechukwu Agbagwa
American Journal of Plant Sciences, 2019
Phytogeographical distribution and fruit diversity of Lagenaria siceraria (Mol.) Standl species i... more Phytogeographical distribution and fruit diversity of Lagenaria siceraria (Mol.) Standl species in Nigeria were accessed. Information on the distribution and fruit diversity was sourced from three herbaria, Forestry
International journal of scientific and research publications, Feb 24, 2020
Sorghum bicolor Race Bicolor, Guinea, Caudatum, Durra and Kafir are typical Sorghum types produce... more Sorghum bicolor Race Bicolor, Guinea, Caudatum, Durra and Kafir are typical Sorghum types produced and consumed in Nigeria. The quality of food is dependent on its nutritional content hence a quest to determine the nutrition content of Sorghum in Southern Nigeria. Ten plants per Race were analysed for its nutrition content (Ash, Fibre, Carbohydrate, Moisture Content and Lipid) using proximate analysis. Maximum ash content was recorded in Race Durra (10.20-13.30 %) while least was recorded in Race Guinea (4.00-4.70%); least moisture content ranged between 30.30-32.00% (Race Guinea); Carbohydrate content levels are as follows Guinea>Caudatum>Bicolor>Kafir>Durra; Lipid content was highest in Race Guinea and least in Race Kafir. The nutritive content of the Sorghum investigated compared well with proximate matter content of cultivated and improved Sorghum varieties. This implies that Sorghum cultivation in Southern Nigeria is possible and yields will be as nutritious as those grown in the North.
American Journal of Plant Sciences, 2014
The efficacy of crude extracts of Senna alata in the improvement of vegetative and reproductive g... more The efficacy of crude extracts of Senna alata in the improvement of vegetative and reproductive growth in Celosia aregentea was investigated. Fresh leaves of S. alata were blended with a homogenizer in 1 litre of distilled water. The resultant green paste was filtered under suction. Different concentrations (75%, 50%, 40%, 30%, 25%, 12%, 10%, and 5%) were prepared from the 100% crude extract. Seeds of C. argentea were presoaked in these different concentrations including a control (0%) and planted out after 24 hours. Results obtained showed that seedling height, leaf area, dry weight and leaf area ratio were promoted and enhanced by presoaking seeds in the extract. At the end of the experimental period (six weeks), seedling height in 75% and 100% treatments were 109 ± 16.12 cm and 117 ± 19.32 cm, leaf area 128 ± 17.91 cm 2 and 125 ± 18.12 cm 2 , dry weight 7.48 kg and 7.0 kg respectively. Seedlings raised from seeds presoaked in water (control) however, flowered earlier (8 weeks) than the treatments (10 weeks in 75% and 100%). Presoaking seeds of C. argentea in crude extracts of S. alata before planting is recommended for optimum production of the leafy vegetable. The procedure is cheap and easily implementable by resource-poor farmers who are the main growers of C. argentea.
This paper considered relationship between soil weed seed bank seedlings and soil physicochemical... more This paper considered relationship between soil weed seed bank seedlings and soil physicochemical parameters in arable farmlands was sampled in rainy and dry seasons at 3 different depths of 0-5, 5-10 and 10-15cm. Arable farmlands were 22 and 3 controls. Soils were collected at four points randomly with a soil auger, prepared for laboratory analyses and 100g each placed into 225 small bowls replicated 3 times, which were perforated and having tissue papers at base for soils to prevent soil and weed seeds wash off at watering. Emerged weed seedlings were counted, identified weekly for 12 weeks. Soils were allowed to dry and turned over at 4 and 8 weeks, respectively. Unidentified weeds seedlings were transferred into bigger bowls with humus soils, labeled to grow further and then identified. The parameters considered included soil weed seed bank seedlings and soil physicochemical properties. Weed seedlings data and result from physicochemical analysis were subjected to correlation analysis. Result at 5cm depth for rainy season revealed abundance of weed species significant (p<0.05) correlated with parameters K and Cu with a correlation coefficient (p-value) of 0.507 (0.016) and 0.611(0.003), respectively. But at 10cm depth it was only correlated with pH with a correlation coefficient (p-value of 0.501 (0.018). However, at 15cm weed species abundance was significant (p<0.
International Journal of Science and Technology Research Archive, Aug 30, 2022
Agricultural crop production systems are constantly evaluated to measure its impact on the crop p... more Agricultural crop production systems are constantly evaluated to measure its impact on the crop producer, soil, crops and the environment. Hence this investigation was carried out to examine the place of multicropping practice in the drive for sustainable agricultural production in the high humid rainforest agroecology of southern Nigeria. Multicropping allows crop producer to plant two or more crops at a time on the same piece of arable farmland. This practice offers some benefits to crop producer’s resilience, harvest more crop species, income, community and soil quality improvement due to various dead plants and animals parts, nutrients balance due to planting shallow and deep rooted crops; and environmental biodiversity. Our findings revealed multicropping as a practice which offers hope to crop producer with more crops harvested throughout the cropping season, extra income and rich dietary intake of the community. It provides effective pests and diseases control of crops due to crop mix and canopy formation of crops, ameliorate soil physicochemical properties and biodiverse of the environment and act as carbon sink.
Journal of Ecosystem & Ecography, Oct 26, 2013
He serves as Consultant to the Federal Ministry of Environment Abuja on Biodiversity and Ecologic... more He serves as Consultant to the Federal Ministry of Environment Abuja on Biodiversity and Ecological issues on the environment. He is an EMP consultant to the World Bank through the Agricultural Research Council of Nigeria. He has published over 30 articles in reputable journals.
Australian Journal of Crop Science, Dec 1, 2015
We assessed 61 Vigna (azuki bean)-specific microsatellite markers for their cross transferability... more We assessed 61 Vigna (azuki bean)-specific microsatellite markers for their cross transferability and efficiency in supporting diversity studies in Cajanus. Thirty Cajanus genotypes comprising 20 different cultivars of pigeonpea (C. cajan) and ten genotypes from five wild relatives of pigeonpea were examined in this study. Of the 61 SSR primer pairs screened, 18 amplified distinct and scorable amplicons 90-600 bp in size, revealing 32 alleles. The percentage transferability of these 18 markers ranged from 31.60% to 100%. Eight primer pairs (CEDG 56, CEDG 91, CEDG 139, CEDG 268, CEDG 275, CEDG 06, CEDG 88 and CEDG 257) amplified SSRs from the 30 genotypes examined, indicating 100% transferability. Except for CEDG 06, all markers with 100% transferability amplified di-nucleotide repeat motifs, with (AG) n as the only repeats. The Polymorphic Information Content (PIC) ranged from 0.24 in CEDG 176 to 0.69 in CEDG 127, with an average of 0.47. The UPGMA clustering method, which we used to assess the genetic distances and relatedness of the genotypes using the 18 successful markers, produced a dendrogram with two clusters, separating all 20 cultivars from the wild relatives at 67% similarity. C. cajanifolius (ICP 1629-1 and ICP 1629-2), which was previously reported to be a progenitor of C. cajan, clustered with the cultivars. The results of this study affirm the transferability of SSR markers within related legume genera. The identified Vigna SSRs will be useful for increasing the marker repository of pigeonpea and for diversity studies of pigeonpea cultivars.
African Journal of Biotechnology, Jul 31, 2005
Chromosome counts from natural populations of Abrus pulchellus in Nigeria were carried out. Tetra... more Chromosome counts from natural populations of Abrus pulchellus in Nigeria were carried out. Tetraploid (2n = 44) chromosome number was constant in all the samples investigated. The 44 chromosomes fall into three cytomorphological categories: eight metacentric and eight submetacentric pairs, and six acrocentric pairs. The chromosomes are relatively small in length ranging from 0.5 to 1.4 m. The polyploid (tetraploid) cytotype is reported for the first time for this taxon.
Global Journal of Pure and Applied Sciences, Feb 18, 2005
Biotechnology(faisalabad), Jun 15, 2012
Chemistry and Ecology, Oct 1, 2006
Reconnaissance survey and laboratory appraisal of the mangrove system in seven communities in the... more Reconnaissance survey and laboratory appraisal of the mangrove system in seven communities in the Niger Delta (Nigeria) endangered by seismic and production operations revealed several alterations of soil, sediment, and vegetation. Hydrocarbon content in the range of 0.3–1.1 mg/100 g was extracted within the proximities of spill sources and seismic lines. The prospect area covered by our investigation was characterized by a mixed mangrove forest dominated by Rhizophora racemosa. It was observed that the construction of the seismic lines was responsible for the vegetal disorientation recurrent in the area. The grass, Paspalum vaginatum, and the saltwater fern, Acrostichum aureum, were found at the fringe of most dredge spoils. The characteristic tidal inundation which increases mobility of the substrate, salinity fluctuation, and anoxia may also have contributed, at least in part, to the observed despoliation of some of these species found within the vicinities of the seismic lines and hydrocarbon percolation. Extensive revegetation program is recommended to ensure an effective restoration process of this ecologically fragile zone.
Turkish Journal of Botany, Oct 19, 2007
Flowering, breeding mechanisms, and pollination biology of Cucurbita moschata (Duch. ex Lam) Duch... more Flowering, breeding mechanisms, and pollination biology of Cucurbita moschata (Duch. ex Lam) Duch. ex Poir. varieties were studied. C. moschata carries male and female flowers on the same plant and is pollinated by thrips and bees with nectar and pollen as major rewards for the pollinators. Both flowers begin opening between 0330 and 0400 hours. The male flower opens for about 8 to 9 h and the female opens for 6 h 30 min to 7 h. There is, however, a period of overlap in the flower anthesis of both sexes, which coincides with the peak of pollen viability and pollinator activity. Pollen viability is about 90% in newly opened flowers but decreases to about 62% on closure and crashes to 8% after 1 day. Stigma receptivity, measured by pollen germination on the stigma, lasts from 1 day before anthesis to 2 days afterwards. There was no evidence of non-pseudogamous agamospermy.
Journal of Advances in Biology & Biotechnology, Apr 30, 2018
Asian Journal of Plant Sciences, Dec 15, 2005
American Journal of Plant Sciences, 2019
Bioinformatics has been a major tool in the revolution of plant systematics in recent times. The ... more Bioinformatics has been a major tool in the revolution of plant systematics in recent times. The diversity of fruit shapes in Lagenaria siceraria (Mol.) standl. species has been of great concern because of its fruit complexity. This study is based on the application of rubisco enzyme using rbcL marker because of its conservativeness and its ability to discriminate below the specific level hence its usage to sequence the chloroplast genome with ABI, PRISM 377 DNA sequencer. The sequences obtained were viewed using MEGA X software and subsequently subjected to validation through National Center for Biotechnology Information (NCBI) using Nucleotide Basic Local Alignment Search Tool (BLAST N). The result obtained showed that all the sequences belong to Lagenaria siceraria (Mol.) standl. with percentages ranging from 95% to 100% for query cover sequences and 98% to 100% for identity sequences. From the taxonomic report obtained sequence A, C, G, H, J, Q has the highest hits of 44 on Lagenaria siceraria out of 109 total value, sequence O and R has the highest hits of 44 on Lagenaria siceraria out of the total value of 111, sequence V has the highest hits of 44 on Lagenaria siceraria out of 119 total value and sequence X finally has the highest value hits of 44 on Lagenaria sceriania out of 105 total value, based on this report, phylogenetic tree was constructed to show the level of relatedness of the different fruit diversity of L. siceraria complex. This work therefore has aided in the molecular characterization of Lagenaria siceraria (Mol.) standl. landraces found in Nigeria.
International journal of scientific and research publications, Jan 6, 2020
Sorghum cultivation and distribution in Nigeria spans the entire North and Southern Region (Savan... more Sorghum cultivation and distribution in Nigeria spans the entire North and Southern Region (Savannah and Rain Forest Regions). Sorghum is generally not cultivated in the Southern region hence its attribute of not thriving in the Southern regions of Nigeria. Also, relegation of Sorghum to the S. bicolor is also responsible for this assertion since wild species such as S. arundinaceum, S. vogellianum, S. aethiopicum and S. vociflorum are grow as weeds and abound in most localities in the South except for the saline environment. Herbarium specimen review and field data collection were adapted as tools to determine the distribution of Sorghum in Nigeria. Results suggests that S. arundinaceum is the most abundant species of Sorghum (in terms of distribution) in Nigeria closely followed by S. vogelleianum before S. bicolor. Field studies also accounted for localities where Sorghum species exists but not recorded in the flora or herbarium archives.
International Journal of Botany, Dec 15, 2010
Global Journal of Pure and Applied Sciences, Jul 21, 2006
Asian Journal of Plant Sciences, Oct 15, 2005
Plant science today, Jan 9, 2023
Ipomoea, with enormous economic importance, is a large genus with species that are highly evoluti... more Ipomoea, with enormous economic importance, is a large genus with species that are highly evolutionarily diverged. There is dearth of information regarding the phylogenetic relationships of the Nigerian species of the genus Ipomoea. It is therefore imperative to use contemporary taxonomic evidences to understand the diversity of its distribution in a region and provide enhanced delimitation of the taxa. In this study, 6 genic simple sequence repeat (SSR) markers whose cross transferability have been established among the plant species were selected to appraise their level of polymorphism and used to study the phylogenetic relationships among 11 indigenous Nigerian Ipomoea species. The 6 SSR loci showed varying levels of polymorphism among the genotypes of all 11 species assessed and demonstrated 100% polymorphism when examined across the 11 species. A total of 55 alleles were produced. The PIC of the primers ranged between 0.2223 and 0.874 with an average value of 0.71885. Phylogenetic analysis clustered species into 3 major and 6 sub clusters wherein the species were clearly separated. This study has shown the effectiveness of developed genic SSR markers for establishing phylogenetic relationship in Ipomoea species.
American Journal of Plant Sciences, 2019
Phytogeographical distribution and fruit diversity of Lagenaria siceraria (Mol.) Standl species i... more Phytogeographical distribution and fruit diversity of Lagenaria siceraria (Mol.) Standl species in Nigeria were accessed. Information on the distribution and fruit diversity was sourced from three herbaria, Forestry
International journal of scientific and research publications, Feb 24, 2020
Sorghum bicolor Race Bicolor, Guinea, Caudatum, Durra and Kafir are typical Sorghum types produce... more Sorghum bicolor Race Bicolor, Guinea, Caudatum, Durra and Kafir are typical Sorghum types produced and consumed in Nigeria. The quality of food is dependent on its nutritional content hence a quest to determine the nutrition content of Sorghum in Southern Nigeria. Ten plants per Race were analysed for its nutrition content (Ash, Fibre, Carbohydrate, Moisture Content and Lipid) using proximate analysis. Maximum ash content was recorded in Race Durra (10.20-13.30 %) while least was recorded in Race Guinea (4.00-4.70%); least moisture content ranged between 30.30-32.00% (Race Guinea); Carbohydrate content levels are as follows Guinea>Caudatum>Bicolor>Kafir>Durra; Lipid content was highest in Race Guinea and least in Race Kafir. The nutritive content of the Sorghum investigated compared well with proximate matter content of cultivated and improved Sorghum varieties. This implies that Sorghum cultivation in Southern Nigeria is possible and yields will be as nutritious as those grown in the North.
American Journal of Plant Sciences, 2014
The efficacy of crude extracts of Senna alata in the improvement of vegetative and reproductive g... more The efficacy of crude extracts of Senna alata in the improvement of vegetative and reproductive growth in Celosia aregentea was investigated. Fresh leaves of S. alata were blended with a homogenizer in 1 litre of distilled water. The resultant green paste was filtered under suction. Different concentrations (75%, 50%, 40%, 30%, 25%, 12%, 10%, and 5%) were prepared from the 100% crude extract. Seeds of C. argentea were presoaked in these different concentrations including a control (0%) and planted out after 24 hours. Results obtained showed that seedling height, leaf area, dry weight and leaf area ratio were promoted and enhanced by presoaking seeds in the extract. At the end of the experimental period (six weeks), seedling height in 75% and 100% treatments were 109 ± 16.12 cm and 117 ± 19.32 cm, leaf area 128 ± 17.91 cm 2 and 125 ± 18.12 cm 2 , dry weight 7.48 kg and 7.0 kg respectively. Seedlings raised from seeds presoaked in water (control) however, flowered earlier (8 weeks) than the treatments (10 weeks in 75% and 100%). Presoaking seeds of C. argentea in crude extracts of S. alata before planting is recommended for optimum production of the leafy vegetable. The procedure is cheap and easily implementable by resource-poor farmers who are the main growers of C. argentea.
This paper considered relationship between soil weed seed bank seedlings and soil physicochemical... more This paper considered relationship between soil weed seed bank seedlings and soil physicochemical parameters in arable farmlands was sampled in rainy and dry seasons at 3 different depths of 0-5, 5-10 and 10-15cm. Arable farmlands were 22 and 3 controls. Soils were collected at four points randomly with a soil auger, prepared for laboratory analyses and 100g each placed into 225 small bowls replicated 3 times, which were perforated and having tissue papers at base for soils to prevent soil and weed seeds wash off at watering. Emerged weed seedlings were counted, identified weekly for 12 weeks. Soils were allowed to dry and turned over at 4 and 8 weeks, respectively. Unidentified weeds seedlings were transferred into bigger bowls with humus soils, labeled to grow further and then identified. The parameters considered included soil weed seed bank seedlings and soil physicochemical properties. Weed seedlings data and result from physicochemical analysis were subjected to correlation analysis. Result at 5cm depth for rainy season revealed abundance of weed species significant (p<0.05) correlated with parameters K and Cu with a correlation coefficient (p-value) of 0.507 (0.016) and 0.611(0.003), respectively. But at 10cm depth it was only correlated with pH with a correlation coefficient (p-value of 0.501 (0.018). However, at 15cm weed species abundance was significant (p<0.
International Journal of Science and Technology Research Archive, Aug 30, 2022
Agricultural crop production systems are constantly evaluated to measure its impact on the crop p... more Agricultural crop production systems are constantly evaluated to measure its impact on the crop producer, soil, crops and the environment. Hence this investigation was carried out to examine the place of multicropping practice in the drive for sustainable agricultural production in the high humid rainforest agroecology of southern Nigeria. Multicropping allows crop producer to plant two or more crops at a time on the same piece of arable farmland. This practice offers some benefits to crop producer’s resilience, harvest more crop species, income, community and soil quality improvement due to various dead plants and animals parts, nutrients balance due to planting shallow and deep rooted crops; and environmental biodiversity. Our findings revealed multicropping as a practice which offers hope to crop producer with more crops harvested throughout the cropping season, extra income and rich dietary intake of the community. It provides effective pests and diseases control of crops due to crop mix and canopy formation of crops, ameliorate soil physicochemical properties and biodiverse of the environment and act as carbon sink.
Journal of Ecosystem & Ecography, Oct 26, 2013
He serves as Consultant to the Federal Ministry of Environment Abuja on Biodiversity and Ecologic... more He serves as Consultant to the Federal Ministry of Environment Abuja on Biodiversity and Ecological issues on the environment. He is an EMP consultant to the World Bank through the Agricultural Research Council of Nigeria. He has published over 30 articles in reputable journals.
Australian Journal of Crop Science, Dec 1, 2015
We assessed 61 Vigna (azuki bean)-specific microsatellite markers for their cross transferability... more We assessed 61 Vigna (azuki bean)-specific microsatellite markers for their cross transferability and efficiency in supporting diversity studies in Cajanus. Thirty Cajanus genotypes comprising 20 different cultivars of pigeonpea (C. cajan) and ten genotypes from five wild relatives of pigeonpea were examined in this study. Of the 61 SSR primer pairs screened, 18 amplified distinct and scorable amplicons 90-600 bp in size, revealing 32 alleles. The percentage transferability of these 18 markers ranged from 31.60% to 100%. Eight primer pairs (CEDG 56, CEDG 91, CEDG 139, CEDG 268, CEDG 275, CEDG 06, CEDG 88 and CEDG 257) amplified SSRs from the 30 genotypes examined, indicating 100% transferability. Except for CEDG 06, all markers with 100% transferability amplified di-nucleotide repeat motifs, with (AG) n as the only repeats. The Polymorphic Information Content (PIC) ranged from 0.24 in CEDG 176 to 0.69 in CEDG 127, with an average of 0.47. The UPGMA clustering method, which we used to assess the genetic distances and relatedness of the genotypes using the 18 successful markers, produced a dendrogram with two clusters, separating all 20 cultivars from the wild relatives at 67% similarity. C. cajanifolius (ICP 1629-1 and ICP 1629-2), which was previously reported to be a progenitor of C. cajan, clustered with the cultivars. The results of this study affirm the transferability of SSR markers within related legume genera. The identified Vigna SSRs will be useful for increasing the marker repository of pigeonpea and for diversity studies of pigeonpea cultivars.
African Journal of Biotechnology, Jul 31, 2005
Chromosome counts from natural populations of Abrus pulchellus in Nigeria were carried out. Tetra... more Chromosome counts from natural populations of Abrus pulchellus in Nigeria were carried out. Tetraploid (2n = 44) chromosome number was constant in all the samples investigated. The 44 chromosomes fall into three cytomorphological categories: eight metacentric and eight submetacentric pairs, and six acrocentric pairs. The chromosomes are relatively small in length ranging from 0.5 to 1.4 m. The polyploid (tetraploid) cytotype is reported for the first time for this taxon.
Global Journal of Pure and Applied Sciences, Feb 18, 2005
Biotechnology(faisalabad), Jun 15, 2012
Chemistry and Ecology, Oct 1, 2006
Reconnaissance survey and laboratory appraisal of the mangrove system in seven communities in the... more Reconnaissance survey and laboratory appraisal of the mangrove system in seven communities in the Niger Delta (Nigeria) endangered by seismic and production operations revealed several alterations of soil, sediment, and vegetation. Hydrocarbon content in the range of 0.3–1.1 mg/100 g was extracted within the proximities of spill sources and seismic lines. The prospect area covered by our investigation was characterized by a mixed mangrove forest dominated by Rhizophora racemosa. It was observed that the construction of the seismic lines was responsible for the vegetal disorientation recurrent in the area. The grass, Paspalum vaginatum, and the saltwater fern, Acrostichum aureum, were found at the fringe of most dredge spoils. The characteristic tidal inundation which increases mobility of the substrate, salinity fluctuation, and anoxia may also have contributed, at least in part, to the observed despoliation of some of these species found within the vicinities of the seismic lines and hydrocarbon percolation. Extensive revegetation program is recommended to ensure an effective restoration process of this ecologically fragile zone.
Turkish Journal of Botany, Oct 19, 2007
Flowering, breeding mechanisms, and pollination biology of Cucurbita moschata (Duch. ex Lam) Duch... more Flowering, breeding mechanisms, and pollination biology of Cucurbita moschata (Duch. ex Lam) Duch. ex Poir. varieties were studied. C. moschata carries male and female flowers on the same plant and is pollinated by thrips and bees with nectar and pollen as major rewards for the pollinators. Both flowers begin opening between 0330 and 0400 hours. The male flower opens for about 8 to 9 h and the female opens for 6 h 30 min to 7 h. There is, however, a period of overlap in the flower anthesis of both sexes, which coincides with the peak of pollen viability and pollinator activity. Pollen viability is about 90% in newly opened flowers but decreases to about 62% on closure and crashes to 8% after 1 day. Stigma receptivity, measured by pollen germination on the stigma, lasts from 1 day before anthesis to 2 days afterwards. There was no evidence of non-pseudogamous agamospermy.
Journal of Advances in Biology & Biotechnology, Apr 30, 2018
Asian Journal of Plant Sciences, Dec 15, 2005
American Journal of Plant Sciences, 2019
Bioinformatics has been a major tool in the revolution of plant systematics in recent times. The ... more Bioinformatics has been a major tool in the revolution of plant systematics in recent times. The diversity of fruit shapes in Lagenaria siceraria (Mol.) standl. species has been of great concern because of its fruit complexity. This study is based on the application of rubisco enzyme using rbcL marker because of its conservativeness and its ability to discriminate below the specific level hence its usage to sequence the chloroplast genome with ABI, PRISM 377 DNA sequencer. The sequences obtained were viewed using MEGA X software and subsequently subjected to validation through National Center for Biotechnology Information (NCBI) using Nucleotide Basic Local Alignment Search Tool (BLAST N). The result obtained showed that all the sequences belong to Lagenaria siceraria (Mol.) standl. with percentages ranging from 95% to 100% for query cover sequences and 98% to 100% for identity sequences. From the taxonomic report obtained sequence A, C, G, H, J, Q has the highest hits of 44 on Lagenaria siceraria out of 109 total value, sequence O and R has the highest hits of 44 on Lagenaria siceraria out of the total value of 111, sequence V has the highest hits of 44 on Lagenaria siceraria out of 119 total value and sequence X finally has the highest value hits of 44 on Lagenaria sceriania out of 105 total value, based on this report, phylogenetic tree was constructed to show the level of relatedness of the different fruit diversity of L. siceraria complex. This work therefore has aided in the molecular characterization of Lagenaria siceraria (Mol.) standl. landraces found in Nigeria.
International journal of scientific and research publications, Jan 6, 2020
Sorghum cultivation and distribution in Nigeria spans the entire North and Southern Region (Savan... more Sorghum cultivation and distribution in Nigeria spans the entire North and Southern Region (Savannah and Rain Forest Regions). Sorghum is generally not cultivated in the Southern region hence its attribute of not thriving in the Southern regions of Nigeria. Also, relegation of Sorghum to the S. bicolor is also responsible for this assertion since wild species such as S. arundinaceum, S. vogellianum, S. aethiopicum and S. vociflorum are grow as weeds and abound in most localities in the South except for the saline environment. Herbarium specimen review and field data collection were adapted as tools to determine the distribution of Sorghum in Nigeria. Results suggests that S. arundinaceum is the most abundant species of Sorghum (in terms of distribution) in Nigeria closely followed by S. vogelleianum before S. bicolor. Field studies also accounted for localities where Sorghum species exists but not recorded in the flora or herbarium archives.
International Journal of Botany, Dec 15, 2010
Global Journal of Pure and Applied Sciences, Jul 21, 2006
Asian Journal of Plant Sciences, Oct 15, 2005
Plant science today, Jan 9, 2023
Ipomoea, with enormous economic importance, is a large genus with species that are highly evoluti... more Ipomoea, with enormous economic importance, is a large genus with species that are highly evolutionarily diverged. There is dearth of information regarding the phylogenetic relationships of the Nigerian species of the genus Ipomoea. It is therefore imperative to use contemporary taxonomic evidences to understand the diversity of its distribution in a region and provide enhanced delimitation of the taxa. In this study, 6 genic simple sequence repeat (SSR) markers whose cross transferability have been established among the plant species were selected to appraise their level of polymorphism and used to study the phylogenetic relationships among 11 indigenous Nigerian Ipomoea species. The 6 SSR loci showed varying levels of polymorphism among the genotypes of all 11 species assessed and demonstrated 100% polymorphism when examined across the 11 species. A total of 55 alleles were produced. The PIC of the primers ranged between 0.2223 and 0.874 with an average value of 0.71885. Phylogenetic analysis clustered species into 3 major and 6 sub clusters wherein the species were clearly separated. This study has shown the effectiveness of developed genic SSR markers for establishing phylogenetic relationship in Ipomoea species.