攀西地区野生狗牙根遗传多样性研究

Assessment of Genetic Diversity of Native Bermudagrass Accessions Collected in Panxi Region,Sichuan Province

从形态、同工酶水平研究15份狗牙根(其中野生种12份,对照3份)的遗传多样性。结果表明:野生种外部形态变异较大,聚类分析结果可分为3类;同工酶电泳结果显示野生种蛋白质多样性程度较高;不同居群蛋白质图谱与地理分布和生境条件有一定关系;过氧化物酶同工酶作为遗传标记,可用于本地区狗牙根种以下单位亲源关系和遗传多样性的研究。

To analyze the genetic diversity of native bermudagrass (Cynodon dactylon) by the plant morphology and isozyme levels, we collected from Panxi region 12 native bermudgrass accessions and 3 introduced accessions as controls for the study .The result shows that: (1) The 12 native accessions vary distinctly in form and structure;(2) By cluster analysis, the 15 accessions could be classified into 3 types: tall and strong; low and hairy, and fine texture with short internodes. Tifway, an introduced accession, is the only one of this type;(3) The pattern of isozyme POD electrophoresis shows that the native accessions boast striking protein polymorphism which is related to their geographic distribution and ecological factors. POD isozyme, as a genetic mark, could be used to attest to the relationship and genetic diversity of burmudagrass accessions collected in the same area.