松嫩草原羊草种群遗传分化的研究

通过等位酶技术, 综合分析了松嫩平原11 个羊草种群的遗传多样性及遗传分化指标, 深入剖析了灰绿型和黄绿型两种叶色类型羊草种群之间的遗传差异:两类种群在等位基因频率、非平衡位点和A、P、He 及固定指数F 上明显不同, 两类种群间有极明显的遗传分化。黄绿型种群的A、P、He 皆低于灰绿型;黄绿型F < 0, 灰绿型F > 0, 这种差异主要表现在DIA-1、PGM、SKD 和ACP 等位点上;两类种群间的遗传分化主要发生在ADH、DIA-2 和PGM 等位点上。种群间的遗传距离与地理距离之间没有相关。

GENETIC DIFFERENTIATION OF LEYMUS CHINENSIS POPULATIONS IN SONGNEN GRASSLAND

Genetic diversity and genetic differentiation of 11 Leymus chinensis populations with 2 types of grayish green and yellowish green in Songnen grassland were studied by allozyme analysis. There were differences in the allele frequency, non-equilibrium loci, A. P. He and fixation index between 2 types. The A. P. and He of yellowish green type were lower than those of grayish green type. The fixation index was less than zero in yellowish green type, and that was greater than zero in grayish green type. The difference of fixation index between the 2 types was mainly on the difference at DIA-1, PGM, SKD, and ACP loci. The genetic differentiation between the 2 types was mainly on the differentiation at ADH, DIA-2, and PGM loci. There was no correlation between the geographical distance and the genetic distance.