陆地棉野生种系幼苗期耐旱性初步评价

rought is one of the abiotic stresses in cotton production. Improving drought tolerance of cotton and cultivating drought-tolerant varieties are of great significance for cotton production.The genetic basis of gossypium hirsutum races germplasm resources is more abundant than the cultivated upland cotton.Therefore, it is important to evaluate the drought tolerance of Semi-wild cotton and to screen drought-tolerant lines. It is of great significance to improve the drought tolerance of cultivated cotton by using gossypium hirsutum races. Drought tolerance evaluation of 69 gossypium hirsutum races accessions using PEG6000 simulated drought conditation.The results shows that the drought tolerance level of the tested materials is divided into 5 grades from high resistance to high sensitivity.It is preliminarily determined that Morrilli 84, Palmeri 51, and Yucatanense 1039A are drought-tolerant materials at seedling stage.