تجزیه آماری عملکرد و صفات زراعی در بین نتایج تلاقی لاین‌های گندم تحت تنش شوری

Salinity is one of a major abiotic stress, specifically on arid and semi-arid areas that has influenced on crop growth and reduced grain yield. The purpose of present study was identification of agronomic traits related to wheat grain yield variation under control and salinity conditions. In order to produce a population of 272 recombinant inbred lines (RILs), a cross between two bread wheat cultivars, namely Roshan and Sabalan, was made and the resulted seeds were cultivated under control and saline conditions at a research field of Yazd during 2011-2012 cropping season. The trial was arranged in an alpha-lattice design with two replications. Grain yield, harvest index, biological yield, 1000-kernel weight, grain weight per spike, number of grain per spike, height plant was evaluated on harvest time. In order to study relationship between wheat grain yield and some agronomic traits in both control and stress conditions was used five statistical methods including simple correlation, multiple linear regression, stepwise regression, principle component analysis and factor analysis. The results were indicated that biological yield and harvest index were the most important variable explained grain yield under both sets of conditions. Therefore, grain yield can be increased with biological yield and harvest index enhancement under control and stress conditions.