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Stability Assessment of Some West African Okra （Abelmoschus caillel~ Genotypes in Nigerian Genebank

Journal of Life Sciences 2011年第11期5卷 906-912页

作者： aladele sunday ezekiel Omolayo Johnson Ariyo Olusola Babatunde Kehinde2 Department of Plant Genetic Resources National Centre for Genetic Resources and Biotechnology （NACGRAB） Ibadan 200273 Nigeria Department of Plant Breeding and Seed Technology University of Agriculture A beokuta 110101 Nigeria

Stability among 50 accessions of West African okra （Abelmoschus caillei） was assessed under three diverse ecological environments at Abeokuta, Ibadan and Mokwa in Nigeria during 2005 and 2006 cropping season. The accessions were grown in a Randomized Complete Block Design with three replications; data were collected on 5-10 randomly selected plants from each plot. Only 20 accessions were subjected to stability analysis on the basis of yield across the three environments. The joint regression analysis, deviation means square were computed using Eberhart and Russell method and complemented with Francis and Kannenberg method. The regression coefficients of accessions mean yields on the environmental index resulted in regression coefficients ranging in values from 0.5549 to 1.6667. OAA/96/175-5328, NGAE-96-011 and NGAE-96-0060 were among the superior genotypes with high yield performance. The large variation in regression values indicated large differences in genotype response to different environments. It suggests that stability concept of Ebelhart and Russell could be modified to use any yield components that has strong correlation with yield for stability analysis. The two promising accessions ofA. caillei （NGAE-96-011 and NGAE-96-0060） needed to be further tested on farmers＇ field to obtain on-farm data, alter which it should be recommended for official registration and released by the National Committee on Naming, Registration and Release of Crop varieties in Nigeria.

关键词： Stability assessment environmental index genotype West African okra.

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