12份苜蓿种质材料苗期抗旱性综合评价

Comprehensive evaluation of drought resistance of twelve alfalfa accessions at seedling stage

采用室内盆栽法研究12份苜蓿(Medicago sativa)种质材料在3个土壤水分梯度下[对照(CK)、中度干旱(M)、重度干旱(S)]对干旱胁迫的响应,并通过隶属函数标准差系数赋予权重法对其进行抗旱性综合评价,为新疆地区抗旱苜蓿品种的选育提供理论依据。研究结果表明,12份苜蓿的苗期抗旱性从强到弱依次为和田大叶紫花苜蓿>敖汉紫花苜蓿>阿尔泰杂花苜蓿>甘农3号紫花苜蓿>奇台苜蓿>巴州苜蓿>沙湾苜蓿>阜康苜蓿>北疆紫花苜蓿>布尔津苜蓿>策勒苜蓿>伊犁苜蓿。

The article reported the response of twelve alfalfa（Medicago sativa） germlasms under three soil water conditions （control, moderate and severe drought stress） with pot experiment in room. The subordinative function of the standard deviation coefficient given weighting was utilized to comprehensive evaluation of the alfalfa germlasms drought resistance. The results showed tha： the drought resistance of the twelve alfalfa germlasms followed this order： Medicago sativa cv. Hetian Daye〉M. sativa cv. Aohan〉 M. ovaria, cv. Aletai〉M. sativa cv. Gannong No. 3〉M. sativa（ Qitai） 〉M. sativa（Bazhou） 〉M. sativa （Shawan） 〉M. sativa （Fukang） 〉M. sativa cv. Beijiang〉M. sativa （Buerj in） 〉M. sativa （ Cele） 〉M. sativa （Yili）. This research provided the theoretical basis for drought-resistant alfalfa breeding in Xiniiang.