黑龙江省杂草稻与栽培稻的生物学多样性及遗传关系研究

Studies on Biological Diversity and Genetic Differentiation of Heilongjiang Weedy Rice and Cultivated Rice

为评价杂草稻与栽培稻的遗传多样性及其变异关系,用9个农艺性状研究了50份杂草稻和18份栽培稻的生物学多样性及遗传关系。结果表明,杂草稻株高、穗长、平均穗粒数、结实率、芒长、芒色、粒色等植物学特性均较栽培稻变异大。Nei’s遗传多样性值(h)明显高于栽培稻,表明杂草稻比亚洲栽培稻具有更丰富的遗传多样性。UPGMA聚类为明显的杂草稻与栽培稻两个类群,且关系密切,但在遗传上存在明显的分化。杂草稻较栽培稻植物学特性变异大,遗传多样性丰富,在遗传上存在明显的分化,支持将其视为不同亚种的观点。

To evaluate the genetic diversity and variation of weed rice and cultivated rice, 50 accessions of weed rice and 18 cultivars of cultivated rice were analyzed by 9 phytological characteristics. The results showed that, Weeds in rice plants high, ear length, the average number of grains per spike, seed setting rate, awn length, awn color, grain color and other botanical features great variation than those of cultivated rice. Nei ’ s genetic diversity （h） indicated that the genetic diversity of weed rice was obviously higher than that of cultivated rice. The UPGMA cluster analysis revealed that there was a close relationship between weed rice and cultivated rice, but distinct genetic differentiation was detected between them, supporting the point of view that they are two independent species.