وراثت‌پذیری صفات فنولوژیک و عملکردی گندم نان (Triticum aestivum L.) در شرایط دیم

Agriculture in rainfed conditions is one of the most important systems of crops production in the world, but the yield of crops in rainfed conditions is about 42 percent of irrigated conditions and increasing of yield under these conditions is one of the main breeding objects. Due to being polygenic of yield, the selection based on yield in rainfed wheat has not led to producing of high-yielding and resistant varieties and in order to breeding and introduction of wheat cultivars with high yield and drought tolerant traits, we should be use those traits that have proper relationship, positive and significant correlation with yield and high heritability. However, to study the heritability of phonological and yielding traits of wheat in rainfed conditions, an experiment was conducted in a randomized complete block design with three replications in 50 lines of F2:3 along with parents (totally 52 lines). Evaluation of genetic variance components and calculation of heritability in studied population showed that the grain yield and harvest index have moderate to low heritability and total of evaluated phenological traits have low heritability.