为了配合早籼新组合V20A× 26窄早的示范、推广,近年来我们对其制种技术进行了初步的研究,现总结如下。 一、双亲的特征特性 不育系V20是V20与71—72 A杂交转育而成的;恢复系26窄早是从(IR26×窄叶青8号)F2×早恢1号的后代中,经多代选育而成的。它们各有不同特点: 1.生育期。V2 In order to cooperate with the early indica new combination V20A × 26 narrowly early demonstration, promotion, in recent years we have made a preliminary study of its seed production technology, are summarized as follows. First, the characteristics of the parents of the male sterile line V20 is V20 and 71-72 A cross hybridization derived from the restorer line 26 narrow as early as (IR26 × Narrow Yeqing 8) F2 × early recovery No. 1 offspring, After many generations of breeding. They have different characteristics: 1. Growth period. V2