Evaluation of Pedigree and Single Seed Descent Selection Methods for Cultivar Development in Cowpea (Vigna unguiculata L. Walp) |
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| Authors: | I O Obisesan |
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| Institution: | Department of Plant Science, Obafemi Awolowo University, Ile-Ife, Nigeria |
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| Abstract: | Three crosses of cowpea (Vigna unguiculata L.] Walp) were used to assess the effectiveness of two selection procedures in cowpea. The selection procedures were pedigree selection (PD) and single seed descent selection (SSD). Lines developed through each procedure were yield tested and selected at F6 and F7 for PD and SSD, respectively. The selected lines for both procedures were compared at F8 for grain yield per plant (YLD), number of pods per plant (NPO), and pod development period (PDP), in two locations. Lines developed through both procedures differed more in their population means than in the performance of their top 10% or highest yielding lines. There was no consistent relationship between magnitude of genetic variability and percentage of superior lines obtained from each procedure. Both procedures have been effective in producing superior genotypes for yield and number of pods. The PD method produced superior transgressive segregants in two out of the three crosses for PDP. SSD allowed a more rapid generation than PD. |
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| Keywords: | Vigna unguiculata pedigree selection single seed descent selection transgressive segregants |
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