BRASSICASP ارزيابي تحمل به خشكي ارقام بهاره كلزا

Drought resistance evaluation in spring rapeseed cultivars

of rapeseed among common cultivars in Eastern-Azarbijan, an experiment was carried out at Research Station of Facualty of Agriculture, University of Tabriz, Tabriz, Iran. Genetic material was constituted of Global, Puma, Regent, Eureka and PF 7045.91 from napus species, Sonja and Parkland from rapa species and two hybrids, Hyola308 and Hyola401. The experiment was conducted using a spite-plot design arranged in RCBD with 8 replications. Irrigation treatments with two level control and water deficit, were considered as main factor and cultivars as sub factors. Water deficit treatment was created by with holding irrigation at 50% flowering. Four weeks after induction of stress, physiological characteristics including leaf water potential, specific leaf weight, and relative water content along with plant height, shoot dry weight, number and length of silique were measured. Mean of all traits, studied except specific leaf weight, were decreased under water deficit condition. Among the cultivars, studied global, had potentially higher number of silique, leaf water potential and shoot dry weight under both normal and water deficit condition. Thus. not only this genotype can directly be grown under water deficit condition but also can be used as one of the parent in developing mapping populations for identification of quantitative trait loci (QTL) for traits contributing in drought resistance.