新疆北部地区(北疆)苜蓿属植物秋眠性的研究

Studies on the Fall Dormancy of Medicago Populations from Northern Xinjiang

以紫花苜蓿栽培品种为对照 ,对新疆北部地区 (北疆 ) 2 8份四倍体苜蓿属植物种群即紫花苜蓿(Medicago sativa)、黄花苜蓿 (M.f alcata)、多变苜蓿 (M.varia)的秋眠性进行了研究。结果表明 ,北疆苜蓿属植物种群和国内紫花苜蓿种群相对秋眠性等级值水平为 1～ 3级 ,其中野生种群表现为极秋眠性 (1级 ) ,反映了中国苜蓿种质资源蕴藏着较强的抗寒性种质。针对我国苜蓿属植物资源研究现状和国际研究趋势 ,提出了加强秋眠性研究的建议。

The fall dormancy of 28 populations of Medicago (M.sativa,M.falcata,M.varia) from Northern Xinjiang was studied.The fall dormancy of 17 cultivars of Medicago from 6 nations,including China,the United States and the former Soviet Union etc.was also analyzed. The result showed that the fall dormancy of domestic Medicago germplasm consisted of 3 grades,namely grade 1,2 and 3 and the wild populations from Northern Xinjiang was ranked grade 1.The results also indicated that Medicago populations of Northwestern China possessed the stronger cold resistance germplasm,especially those of Northern Xinjiang.