关键词: 水稻, 生育期, 早熟性, 显性早熟基因, 基因

Abstract: Ef-cd gene is a dominant earliness gene located on the short arm of rice chromosome 3. In this paper, through continuous backcross, self-pollination and molecular marker assisted selection, individual Ef-cd gene was isolated and nearly isogenic early-maturing lines were constructed by using a genic male-sterile and early-maturing indica line 6442S-7 as donor, and late-maturing indica lines Minghui 63 (MH 63), Shuhui 881 (SH 881) and Shuhui 527 (SH 527) as recipients (genetic background), respectively. Further, it was found out that Ef-cd gene could generally advance rice to head 11-14 days earlier. So, it is considered that Ef-cd gene has an important role in rapid developing early-maturing and super high-yielding rice varieties.

Key words: Rice, Growth season, Earliness, Dominant earliness gene, Gene effect