Indian Society of Genetics & Plant Breeding

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EFFECT OF INTERGENOTYPIC COMPETITION ON YIELD ASSESSMENT IN COWPEA TRIALS

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Study on the effect of intergenotypic competition in cowpea revealed significant
differences among cultivars for their competitive ability. Competition caused significant
changes in the relative performance of cultivars with regard to the characters studied except
pod length and number of seeds per pod. For seed yield, the average competition was the
major source of bias in single-row plots. Estimates of the average competition effects and
average expected bias for seed yield indicated that an aggressive competitor was
overestimated in competition, whereas a poor competitor was underestimated. Negative
correlation between yielding and competing abilities of cultivars suggest the need for
bordered plots in yield evaluation trials of cowpea. Since pod length and number of seeds
per pod were unaffected by competition, they could be beller selection criteria for yield in
single-row plots.
 

Keywords: Border effect, cowpea, intergenotypic competition.

Info

Year: 1997
Volume: 57
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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