نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار، دانشکدة کشاورزی و منابع طبیعی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات
2 کارشناس ارشد بیوتکنولوژی، دانشکدة کشاورزی و منابع طبیعی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to assess the genetic variability for seed germination parameters under salt stress in sunflower and corresponding QTL locations, an experiment was conducted using a population of 80 recombinant inbred lines obtained from a cross between PAC2 and RHA266. The experiment was arranged under a randomized complete block design with three replications in control and saline conditions. Several germination parameters were measured including time to start germination (TSG), time to 50% germination (T50%G), time to maximum germination (TMG) and percentage of seed germination (PSG). Results showed highly significant variations among genotypes (RILs) for all traits. Salt stress had a negative effect on germination, however the significance of RIL × Condition interaction suggested that the RILs have different responses to salt stress. In this study, “1.T50%G.16.1” and “2.T50%G.17.1” QTLs (controlling T50%G under salt and control conditions, respectively) were introduced as large-effect QTLs. Moreover, “2.TSG.16.1” and “1.TSG.16.1” QTLs (controlling TSG) and also “2.PSG.12.1”, “1.PSG.12.1”, “2.PSG.12.3” and “1.PSG.12.2” QTLs (controlling PSG) were introduced as stable QTLs.
کلیدواژهها [English]