野生稻和非洲栽培稻抗稗草种质资源筛选和评价

以盆栽试验对20份野生稻和５份非洲栽培稻材料的稗草出苗率、距离稻株不同范围播种的稗草株高和干重的抑制效果进行评价，并通过聚类分析和方差分析，将其划分为6类。再以稻叶水提液培养稗草，依其发芽抑制率、芽长抑制率、根长抑制率和发芽指数，再次聚类并划分为5类。盆栽和浸提液试验中效果均好的3份野生稻S37、S68、S72和

Evaluation and Screening of Resistance to Barnyardgrass in Germplasm of Wild Rice(Oryza sativa)and African Cultivar

The resistance of 20 wild rice accessions(Oryza sativa) and 5 African cultivars to barnyardgrass (E crusgalli) was studied in pot experiment According to the effect of germination percentage of barnyardgrasses, and its plant height and dry weight of plant at different distance with rice seedlings, there were 6 types of wild rice clustered by means of cluster analysis and variance analysis In bioassay the allelopathic effect of wild rice extracted solution from rice leaf on barnyardgrasses germination, the length of bud and root and so on were measured, based on the data,25 accessions of germplasm were into 5 types The results showed that 3 wild rice accessions, S37, S46, S72,and 1 African cultivar,Y11002 were defined as the allelopathic potential germplasm, they caused significantly resistant effect in pot experiment and bioassay experiment; S113 and Y11002 were defined as strong competitive germplasm showing good effect in pot experiment, but low inhibition in bioassay experiment 5 wild rice accessions, S43, S47, S40, S73, S111, and 2 African cultivars Y11005, Y11001 showed the least effect both in pot experiment and bioassay experiment, were defined as non resistance rice