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在杂交水稻的繁殖制种中,V_(20)A种子发芽势常常达不到要求,而且田间差别较大,同时出苗也不很整齐,导致成秧率低,用种量增加。因而,很有必要研究不育系种子的发芽势,找到提高不育系种子发芽势的有效方法。 据对31个农户储藏三个月后的V_(20)A一级种子的发芽试验,很少几户的种子能达到不育系种子发芽势的要求,户间不育系种子发芽势不同,且差异较大。 种子萌发率在80～90％的农户占16.13％,90％以上的占83.87％,平均萌发率91.80％,标准差2.35,极差10.92％。其中壮芽率80～85％的农户有19.35％,85～90％的有61.29％,90～95％的有19.35％,平均壮芽率87.73％,标准差3.14,极差
In hybrid rice seed production, V 20 A seed germination potential often fail to meet the requirements, and the field difference is larger, at the same time sprouting is not very neat, resulting in a low rate of planting seedlings, with the increase of species. Therefore, it is necessary to study the germination potential of CMS lines and find an effective way to improve the germination potential of CMS lines. According to the germination test of V_ (20) A first-grade seeds stored for 31 months in 31 households, the seeds of few households can achieve the germination potential of CMS. The germination potential of CMS was different, And the difference is bigger. Seed germination rate of 80 ~ 90% of farmers accounted for 16.13%, 90% of the accounted for 83.87%, the average germination rate of 91.80%, the standard deviation of 2.35, a very poor 10.92%. Among them, 19.35% of farmers with strong germination rate of 80-85%, 61.29% of 85-90%, 19.35% of 90-95%, 87.73% of average strong sprouting rate, 3.14 standard deviation, very poor