Abstract
Seven rapeseed genotypes were studied at nine different locations across Pakistan during two growing seasons 2015-16 and
2016-17 for the stability of seed yield. Experiments were conducted in randomized complete block design at each location.
The analysis of variance showed significant differences among genotypes at each location in both years. The genotypes Hyola401 and RBN-13018 produced significantly higher average seed yield than other genotypes tested at different locations and
during both years. The combine analysis of variance indicated that seed yield was highly affected by the change in
environmental conditions. Stability parameters estimated were linear regression coefficient (bi) of a genotype seed yield mean
over locations and deviation from regression (s²d). The high yielding genotype RBN-13018 having regression coefficient
higher than unity (bi>1.0) indicated that this genotype performed better under productive environments only. However, high
yielding genotype Hyola-401 had regression coefficient (bi) close to unity (bi =1.0) and low deviation from regression line
(s²d). It indicated that seed yield of this genotype had non-significant influence of variation in environmental conditions and is
more stable
Tahira, Mubashar Ahmad Khan, Muhammad Arshad, Umbreen Shahzad. (2020) INVESTIGATING ADAPTABILITY AND STABILITY OF RAPESEED CULTIVARS VIA YIELD STABILITY STATISTICS, Pakistan Journal of Agricultural Sciences, Volume 57, Issue 3.
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