PJB-2018-214
STABILITY INDEX AND YIELD PERFORMANCE- A SELECTION CRITERION FOR ADAPTABILITY STUDIES IN WHEAT (Triticum aestivum) GENOTYPES
Farhadullah Khan
Abstract
In a plant breeding program, it is imperative to check the adaptability and stability of a genotype before its release as a new genetically improved commercial variety. It helps to recommend a particular genotype to some specific locality with respect to its yield performance. Adaptability of fourteen bread wheat (Triticum aestivum L.) genotypes was studied at six wheat growing areas of Khyber Pakhtunkhwa and Gilgit Baltistan provinces of Pakistan with aim to select the most stable genotypes and best adapted to a particular locality. The genotypes were sown in three replications in randomized complete block design. Data on grain yield was recorded and subjected to pooled analysis of variance. Due to significant differences among genotypes, locations and their interaction, stability parameters of Eberhart and Russell’s model were computed. Some wheat genotypes could perform well under the environmental conditions of some specific localities where the genotypes could be recommended for commercial cultivation. For grain yield performance, WL-0916-2, Pirsabak-08 and CT-09137 scored the highest yield, and SRN-09102, CT-09141 and SRN-09048 yielded the least. Based on stability parameters and grain yield, the genotypes Pirsabak-08, SRN-09102, SRN-09063, CT-09137 and SRN-09065 were the most stable, and SRN-09111, SRN-09087 and SRN-09048 the least stable. The tested genotypes revealed differential yield responses across the environments with the conclusion that stability performance along with overall mean yield is the most important factor in varietal recommendation for commercial cultivation.
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