Field Screening of Cowpea Genotypes for Alkaline Soil Tolerance

摘要: Cowpea or Southernpea [Vigna unguiculata (L.) Walp.] is an important legume crop used as a feed for livestock, green vegetable, and consumption of its dry beans, which provide 22% to 25% protein. The very sensitive alkaline soil conditions. When grown at pH 7.5 higher, cowpea develops severe leaf chlorosis caused by deficiencies iron (Fe), zinc (Zn), manganese (Mn) resulting in stunted plant growth yield reduction. We evaluated replicated field experiments St. Croix, U.S. Virgin Islands, Juana Diaz, Puerto Rico, 24 PIs two commercial cultivars, some have shown tolerance soils unreplicated, seed regeneration plots the collection. Alkaline conditions Croix were too average genotypes this location being significantly lower 77% less than that Diaz. Nevertheless, performed well both locations. For example, 222756, 214354, 163142, 582605, 582840, 255766, 582610, 582614, 582576, 582809, 349674 yielded upper half group Accession PI 163142 ranked third grain production locations outyielded iron-chlorosis-resistant controls Croix. These deserve further attention potential sources tolerance.