亚麻籽实产量选择指数的研究

Study on the Selection Indices of Seed Yields in Flax

本文以我所近年来选育出的8个高产、抗病品种(系)为材料,研究亚麻籽实单产性状的选择指数。结果表明亚麻籽实单产性状遗传力较低,直接选择效果差,通过相关性状进行间接选择效果亦不好。根据所有选择指数方程对单产性状进行选择,只有综合主茎分枝数,单株桃数,单桃粒数,单株粒重四性状对单产进行间接选择其效果才最佳,选择效率达153.6％,用选择指数对供试的8个品种评审结果表明,坝亚7号是综合性状优良的高产、抗病品种,1009是综合性状最差的品种。

In this paper, selection indices of characters of flax yield was studied. Eight high yield and disease resistant cultivars of our institute were used for the text. The results showed that the heritability was low, direct selection had a poor effect and indirect selection had no effect. Based on selection indices equations, the best effect could be achieved only when bifurcation, fruit number per plant, grain number per fruit and kernels weight per plant were considered comprehensively. The selection efficiency was up to 153. 6% . The results obtained from selection indices showed Baya 7 is a high - yield and disease resistant variety with best in-tergral characters and 1009 is the worst.