بررسی تأثیر تنش خشکی بر وراثت پذیری و عملکرد و اجزای عملکرد هیبریدهای ذرت

In order to evaluate the effect of drought stress on yield of corn hybrids, this study was conducted at Gilan-E-Gharb (Iran). A randomized complete block design with split plot arrangement and three replicates was used. Three irrigation treatments (Normal irrigation, water cut before the appearance of a crown of flowers and water cut after pollination fully and formed embryo) as the main factor and single cross hybrids of maize (500, 582, 666, 647, 700 and 704) to were considered as sub plots. Results showed a reduction in ear length, number of grains per ear, grain yield was observed in terms of water cut before tasseling.The yield most appropriate and the most sensitive cultivars to drought stress in terms of water cut before the appearance of flowers crown the numbers 582 and 647, while in terms of water cut after pollination fully formed fetus, respectively, compared to 700 and 500 respectively. Heritability results showed that changes in ear length, number of kernel rows, number of kernels per row, grain weight, grain yield was influenced by genotype, whereas ear diameter changes were more influenced by environmental conditions.