Characterization of elite forage cowpea genotypes for DUS traits
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Date
2012
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Publisher
CCSHAU
Abstract
The objective of present investigation was to for characterize twenty genotypes of cowpea
{Vigna unguiculata (L.) walp.} on the basis of morphological characters provided by IITA, Ibadan,
Nigeria for DUS testing in cowpea. Results revealed that maximum variation was found among
genotypes on the basis of eye colour in which genotypes IC249141, GFC-4, GFC-3, COFC8 had black
and blue, CO4 had speckling, EC3941-1 had tan and brown, EC101980 and Kohinoor had red and
remaining twelve genotypes had white, cream, brown splash and gray colour group. Whereas, eye
pattern varied from Watson group (seven genotypes), holstein group (three genotypes), small eye group
(four genotypes), narrow eye (three genotypes) to kappa group (three genotypes). On the basis of plant
growth habit four groups were made acute (two genotypes), erect (nine genotypes), semi-erect(four
genotypes) and semi-prostrate (five genotypes).On the basis of extent of seed crowding genotypes had
four groups had extreme crowder (three genotypes), crowder (four genotypes), semi-crowder (genotype
IC249141) and non-crowder (eleven genotypes). On the basis of twining tendency the genotypes were
divided in three groups none (five genotypes), moderate (fourteen genotypes), pronounced (genotype
CO5). Whereas, shape of terminal leaflet varied from very globose (genotype Kohinoor), sub-globose
(five genotypes) to globose (fourteen genotypes). On the basis of pod attachment to peduncle the
genotypes were divided into three groups, two genotypes HC-46 and CO(CP)-7 were erect, seventeen
genotypes were attached at angle of 30 to 90 degree and the genotype EC101980 was pendant. On the
basis of seed length genotypes were divided into three groups, very short(three genotypes), short
(thirteen genotypes) and intermediate (three genotypes). On the basis of seed thickness genotypes were
divided into three categories, genotypes CS88 and Kohinoor were thick, three genotypes were flat,
fifteen genotypes were very-flat. Classification of genotypes on the basis of DUS traits provided
identification of key characteristics of various genotypes.
Description
Keywords
Pheromones, Coffee, Biological phenomena, Developmental stages, Land resources, Planting, Attractants, Wastes, Chromatography, Yields