| Abstract Detail
Molecular Ecology and Evolution Japhet , Wisdom Sohunago [1], Uche, Amadi [2]. The effect of breeding on pattern of phenotypic plasticity of two genotypes of Cowpea (Vigna unguiculata). Phenotypic plasticity which is environmental induce change in a plant's phenotype have stimulated a lot of interest in rrecent times . However, very little work have been done to assess how previous breeding have influenced patterns of phenotypic plasticity in high yielding crop genotypes.To address this question, we grew two Cowpea genotypes originating from two different years in order to assess possible changes in pattern of phenotypic plasticity with respect to sowing density.The modern genotype showed reduced plasticity in stem elongation in response to high density. By contrast, the earlier genotype showed the typical shade avoidance response at high plant density. Interestingly, allocation to reproduction, which is highly correlated with yield was greater in the modern genotype.Our study supports the idea that, reduced plasticity in competitive structures would contribute to the success of crop genotypes. The reduced plasticity exhibited by the modern genotype could be an example of a correlated response to selection for high yield. Information from this study could be useful in developing simulation models for the managment of these genotypes. Log in to add this item to your schedule
1 - Ahmadu Bello University, Zaria Nigeria, Main Campus, Samaru, Samaru, Zaria, Kaduna State, N/A, 2222, Nigeria 2 - Ahmadu Bello University, Biological Sciences, Main campus, Samaru, Zaria, Kaduna, 2222, Nigeria
Keywords: Phenotypic plasticity Selection Shade avoidance Stem elongation Reduced plasticity.
Presentation Type: Oral Paper:Papers for Topics Session: 11 Location: Firs North/Boise Centre Date: Monday, July 28th, 2014 Time: 3:00 PM Number: 11007 Abstract ID:67 Candidate for Awards:None |