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为了进一步鉴定和发掘假俭草抗寒遗传资源,为假俭草抗寒育种和遗传研究提供材料和有价值的信息,本研究采用电解质渗透法对搜集的有代表性的110份假俭草种源进行了抗寒性鉴定。结果表明,我国假俭草不同种源之间的抗寒性存在较大变异,它们的半致死温度的变异范围为-2.55℃~-8.01℃,极差为5.46℃,平均半致死温度为-4.89℃,变异系数为18.01%;进一步对假俭草的半致死温度与地理因子(纬度,经度和海拔)进行了回归分析,结果发现假俭草的半致死温度与纬度,经度和海拔均无线性关系;根据假俭草的半致死温度进行系统聚类分析,可以将110份假俭草种源分为3个类群。
In order to further identify and discover the anti-cold genetic resources of centipedegrass and provide material and valuable information for the anti-cold breeding and genetic research of the centipedegrass, the study collected 110 representative centipedegrass Source of the cold resistance identification. The results showed that the cold tolerance of Centipedegrass in different provenances varied greatly. The range of their lethal temperature ranged from -2.55 ℃ to -8.01 ℃, the range was 5.46 ℃, the average lethal temperature was - 4.89 ℃, and the coefficient of variation was 18.01%. Regression analysis of the lethal temperature and geographical factors (latitude, longitude and altitude) were carried out. The results showed that the median lethal temperature of centipedegrass was latitude, longitude and altitude According to the phylogenetic analysis based on the lethal temperature of centipedegrass, we classified 110 centipede grass species into three groups.