中国新疆苜蓿野生种群秋眠性的研究

Study on Fall Dormancy of Wild Alfalfa Populations in Xinjiang China.

以美国 9个秋眠性标准对照品种为参照 ,按Barnes ( 1991)方法测定了中国新疆野生苜蓿种群 117份、伊朗及其它国家 3 5份材料的秋眠性。结果表明 ,中国新疆北疆苜蓿野生种群没有半秋眠性种质 ,均为秋眠性种质 ,而南疆苜蓿则有秋眠性等级为 4和 5的种群多份 ;来自伊朗等国的材料则具有秋眠、半秋眠、非秋眠类型材料 ,对中国南疆、北疆野生种群秋眠性差异大的原因进行了探讨。

The fall dormancy levels of 117 wild alfalfa populations and 35 germplasm materials introduced from Iran and other countries, were evaluated by using 9 standard fall dormancy cultivars as checks (which supplied by U.S.A.). The results showed: Among the wild alfalfa populations, the dormancy levels of all the materials from the north Xinjiang were below 3; but there were some semi dormancy materials from the south Xinjiang, their fall dormancy levels were 4 and 5. In the materials introduced from Iran and other countries, there were different types of materials with dormancy, semi dormancy and nondormancy. At the end, the reason of fall dormancy difference between the south and the north Xinjiang were disscussed.