IDENTIFICATION OF STABLE GENOTYPES OF RAPESEED USING SOME PARAMETRIC AND NON-PARAMETRIC METHODS UNDER DRYLAND CONDITIONS
Journal Title: Journal of Advances in Internal Medicine - Year 2011, Vol 2, Issue 2
Abstract
Rapeseed breeders aimed to develop varieties which perform relatively well over the target region. However the presence of genotype× environment (GE) hinders selection progress. This study was conducted on 20 improved rapeseed genotypes using some stability indices at three locations in Iran during 2004-2006. The combined analysis of variance indicated significant environment and genotype main effects and a significant GE interaction. The interaction of the studied rapeseed genotypes was predicted by the first two principal components of genotypes and environments. The interaction principle components axes scores presented a disproportionate genotype response which was the major source of variation for any crossover genotype by environment interaction. Additive main effects and multiplicative interaction (AMMI) bi-plot showed that VDH-8003-98, Aviso and Elvis had the lowest interaction in across environments. Aviso produced the highest yield across environments. The GE pattern revealed by AMMI bi-plots indicated that the tested rapeseed genotypes are narrowly adapted, and Aviso was identified as widely adapted genotype according to AMMI stability value and yield reliability index.
Authors and Affiliations
HOSSEIN HATAMZADEH| Dryland agricultural research station-Shirvan, Iran., AZIM KHAZAI| Dry land Agricultural Research station -Khorram Abad, Iran., KHOSHNOOD ALIZADEH*| Dryland Agricultural Research Institute, Iran.
Keywords
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