Morpho-agronomic Characters Under Drought Stress and Genetic Diversity on the Local Landraces of Cowpea [Vigna unguiculata (L.) Walp] From East Nusa Tenggara Province, Indonesia
- Dwi Setyo Rini
- Anni Nuraisyah
Abstract
This study was performed to reveal the morpho-agronomic characters under drought and genetic diversity using SRAP (Sequence-related amplified polymorphism) marker on local landraces of cowpea (Vigna unguiculata (L). Walp) collected from East Nusa Tenggara Province, Indonesia. Data on drought response indexes according to the dry matter production of cowpea plants classified Carolina and Pinu Pahar as drought-sensitive and drought-tolerant cowpea genotypes, respectively. The assessment of the genetic diversity of cowpea genotypes was performed by using 25 SRAP combination primers. A total of 250 bands were produced by which 245 bands (98%) were polymorphic. The value of PIC (Polymorphic Information Content) of SRAP primers in this study varied from the highest value (0.97) to the lowest value (0.71) generated by primer pairs Me4-Em1 and Me3-Em4, respectively, with an average of PIC 0.87. An unweighted pair group method based on arithmetic averages (UPGMA) in this study was performed according to Nei and Li’s similarity index. The analysis of UPGMA and PCoA successfully separated Carolina and Pinu Pahar genotypes into different clusters. The result of the Mantel test showed that there was no significant correlation between the independent morpho-agronomic analysis and SRAP molecular matrix data.- Full Text:
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- DOI:10.5539/jas.v13n3p17
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