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期 刊 ：植物遗传资源学报 2015年 16卷 3期

关键词：高粱；地方品种资源；征集鉴定；遗传多样性；

Keywords:Sorghum, landraces germplasm, collection and identification, genetic diversity,

摘 要 ：对甘肃省东部7个地区30个县海拔953~2024m、纬度33?4′~36?4′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1.203；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、定西和天水地区新征集到的高粱资源遗传多样性最为丰富。

Abstract:The 128 sorghum landraces germplasm distributed in thirties counties of seven prefecture in Gansu province were collected at the elevation between 953-2024 meters and the latitude between 33?4′~36?4′. Based on the identification, eight quality characters and eight quantity characters were analyzed by coefficient variation、genetic diversity index and clustering analysis method. The result showed that average genetic diversity index of 128 germplasm was about 1.203. Among the sixteen characters, the genetic diversity index of weight per spike and the burr trait respectively were the most with 1.468 and the smallest with 0.627; the CV % of panicle type and period of growth respectively were most with 62.99 % and smallest with 3.99 %. The result also showed that the gemplasm genetic diversity index collected from Qingyang prefecture had the most with 1.186 and the smallest with 0.373 collected from Lanzhou prefecture. The result of clustering analysis showed the 128 sorghum landraces germplasm were classified six groups according to their genetic distance, and the genetic diversity of the population from Qingyang, Dingxi and Tianshui prefecture were very ample.

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