EVALUATION OF GRAIN YIELD STABILITY OF SUPERIOR TRITICALE GENOTYPES

Abstract

Triticale is a synthetic crop developed by crossing between wheat and rye which had shown suitable traits such as high yielding of forage and grains, it performs better under harsh environment in comparison with wheat and barley. In order to study of stability of superior triticale lines, this investigation was conducted at two stations in two growing seasons. This study was assigned in randomized complete block design with 3 replications. Each experiment consists of 18 promising lines and cultivars of triticale in addition of two checks of triticale: ET-79-17 and Sanabad. The grain yield of ET-79-17 line were higher than others. The results of rank analysis showed that among studied genotypes, first control had best rank and after it ranking of lines number 6, 12 and 20 were better than others, also minimum environmental coefficient variation was related to lines number 3, 8 and 19. Stability analysis carried out with stability variance of Shukla, Roemer’s environmental variances, Wricke’s equivalence, Finlay and Wilkinson method, Minimum amounts of Lin and Binns variance. In identification of stable lines Wricke’s equivalence and stability variance of Shukla was similar together. Roemer’s environmental variances had positive and significant correlation at 1% probability level with variance of Shukla, Wricke’s equivalence and Lin and Binns variance. Finally, according to different stability parameters it was obvious that lines number 6, 12 and 20 along with ET-79-17 line were more stable than others, so these lines were selected in final.