水稻早世代稳定株系选择与利用的初步研究

Selection and Utilization of Early Generation Uniform Lines in Rice

以８４－１５，Ａ６７为主体亲本，配制不同类型的９个杂交组合，研究了杂交后代农艺性状的分离规律。结果表明，Ｆ３、Ｆ４、Ｆ５稳定株系出现的频率分别为５．５％，１８．６％和２４．１％；８４－１５×８４－１、Ａ６７×高粱稻和Ａ６７×９４５４１Ｆ３代稳定株系频率分别为１２．５％，２０．０％和１６．７％，其它杂交组合则无Ｆ３代稳定株系现象出现。证实了８４－１５，Ａ６７在杂交早期世代确有出现稳定株系的可能性。

Rice varieties 84-15 and A67 were employed as the principal parents to make nine crosses to study the segregation of agronomic characters in early filial generations. The results showed that the frequency of uniform lines in F 3,F 4, F 5 was 5.5%, 18.6% and 24.1%, respectively, among all nine crosses, but in F 3 generation only three crosses of 84-15×84-1, A67×Sorghum rice and A67×94541 showed 12.5 %, 20.0% and 16.7% of uniform lines respectively, the others did not have any uniform lines, which verifies that there does exist the possibility to acquire uniform lines in early segregating generations of 84-15 and A67.