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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.

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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

Phenotypic plasticity
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

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