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对甘肃省东部7个地区30个县海拔953~2024 m、33°44’~36°04’N范围内的高粱地方品种资源进行了考察征集,新征集到高粱品种资源128份。在统一鉴定的基础上采用变异系数、多样性指数和聚类分析方法,对8个质量性状、8个数量性状的遗传多样性进行了分析,结果表明:128份高粱地方品种资源主要性状平均遗传多样性指数1.172;穗粒重遗传多样性指数最高为1.468,芒性遗传多样性指数最低仅0.627;穗型变异系数最高为62.99%,生育期变异系数最低只有3.99%。在7个地区中,庆阳地区征集资源的遗传多样性指数最高为1.186;兰州地区征集的品种资源遗传多样性指数最低仅为0.373。聚类分析表明,128份品种资源可分为6大类,6大类中都有庆阳和定西地区的品种资源,说明庆阳、定西地区新征集到的高粱资源遗传多样性最为丰富。
A total of 128 sorghum cultivars were collected from 30 sorghum cultivars in 95 counties, 2024 m above sea level and 33 ° 44 ’~ 36 ° 04’N in 30 counties of 7 districts in eastern Gansu Province. On the basis of uniform identification, the genetic diversity of 8 quality traits and 8 quantitative traits was analyzed by using the coefficient of variation, diversity index and cluster analysis. The results showed that 128 major sorghum varieties had the average inheritance of major traits The index of diversity was 1.172, the highest index of genetic diversity was 1.468, the lowest was 0.627, the highest coefficient of variation was 62.99%, and the lowest coefficient of variation was 3.99%. In seven areas, the highest genetic diversity index of resources collected in Qingyang was 1.186. The lowest genetic diversity index of cultivars collected in Lanzhou was only 0.373. Cluster analysis showed that 128 cultivars could be divided into six major categories. Among the six major cultivars, cultivars were collected from Qingyang and Dingxi, indicating that the genetic diversity of newly collected sorghum in Qingyang and Dingxi was the highest.