Drought Tolerance of Anther Culture Derived Rice Lines

Abstract

Five single crosses were done between the drought tolerance genotypes and traditional varieties that have highly yielding potential. The forty anther culture derived lines obtained from five crosses viz., Giza 177 x IET 1444, Giza 177 x Yun Len 4, Sakha 101 x IRAT 112,Sakha 103 x IET 1444 and Sakha 103 x Suweon 349. The best five of diploid lines were selected to evaluate under drought and normal conditions and their parents with IET1444 and Giza177 as drought tolerance genotype and sensitive genotype, respectively. So Field and laboratorial experiments were conducted at Sakha Farm Stations, Kafr EL-Shiekh and Seed Technology Research unit in Mansoura during 2012 and 2013 seasons. A randomized complete block design with three replications was used. The ordinary analysis of variance indicated highly significant differences among environments, genotypes and environments x genotypes interaction for chlorophyll content, days to heading, plant height, number of panicles plant-1, grain yield plant-1, germination characters seed protein percentage, seed oil percentage and total carbohydrate percentages traits studied in both environments (normal and drought). The results illustrated that intermediate to high estimates of genetic variance were obtained for days to heading, chlorophyll content, plant height , number of panicles plant-1 and grain yield plant-1. The phenotypic variance values indicated wide phenotypic variability among characteristics studied.

Genetic Diversity of Selected Rice Genotypes under Water Stress Conditions

“…The analyses of variance in Table 4 ; Table 5 showed that the mean squares due to years were significant for major studied traits, except for days to heading, which would indicate overall vast differences among the genotypes studied annually. Abdallah et al [ 28 ] observed the ordinary analysis of variance showed highly significant differences among environments, genotypes, and environments × genotype interaction for root and shoot traits in both treatments (normal and drought). The variation due to interaction between year and variety was not significant for all measures [ 29 ].…”