Indian Society of Genetics & Plant Breeding


Yield stability of rapeseed genotypes under drought stress conditions

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Genotype by Environment (GxE) interactions of 29 rapeseed
genotypes in normal irrigation and irrigation cut off from
flowering and silique formation stages have been worked
out from the data recorded during three cropping seasons.
Combined variance analysis showed a significant variation
for year (cropping season), moisture regimes, genotype,
genotype x moisture regimes and genotype x year
interactions. Results of AMMI model analysis showed that
three first genotype x environment principal components
(PC) were significant at 1% level of probability and fourth
PC at 5% level. These four components explained 35.6,
24.4, 18.4 and 14.8 per cent of the GxE sum of squares,
respectively. According to AMMI2 biplot analysis,
genotypes such as L155, Neptune, Elvise, Jerry, GkGabriella, Sw102, GKH0224, Julius, GKH3705 and Sarigol
were positioned in the center of the biplot so had the least
GxE interaction and showed the most general compatibility.
Based on simultaneous selection, winter type of genotypes
namely, GKH2624, SW102, HW118, GKH3705, Wpn6 and L72
were identified as high yielding and stable whereas, spring
genotypes namely, Zabol10, Dalgan, Jerome and Hyola4815
were identified as low yielding with poor stability.

Keywords: AMMI analysis, simultaneous selection, parametric statistics, canola


Year: 2019
Volume: 79
Issue: 1
Article DOI:
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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