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Mapping and breeding value evaluation of a semi-dominant semi-dwarf gene in upland rice

文献类型： 外文期刊

作者： Chen, Xiaoqian 1 ; Xu, Peng 1 ; Zhou, Jiawu 3 ; Tao, Dayun 3 ; Yu, Diqiu 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Trop Plant Resources & Sustainable Use, Xishuangbanna Trop Bot Garden, Kunming 650223, Yunnan, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

3.YAAS, Food Crops Res Inst, Kunming 650200, Yunnan, Peoples R China

期刊名称：PLANT DIVERSITY （ 影响因子：2.528； ）

ISSN： 2096-2703

年卷期： 2018 年 40 卷 5 期

页码：

收录情况： SCI

摘要： Plant height is an important trait related to yield potential and plant architecture. A suitable plant height plays a crucial role in improvement of rice yield and lodging resistance. In this study, we found that the traditional upland landrace 'Kaowenghan' (KWH) showed a special semi-dwarf phenotype. To identify the semi-dwarf gene from KWH, we raised BC2F4 semi-dwarf introgression lines (IL) by hybridization of the japonica rice cultivar 'Dianjingyou1' (DJY1) and KWH in a DJY1 background. The plant height of the homozygous semi-dwarf IL (IL-87) was significantly reduced compared with that of DJY1. The phenotype of the F-1 progeny of the semi-dwarf IL-87 and DJY1 showed that the semi-dwarf phenotype was semidominant. QTL mapping indicated that the semi-dwarf phenotype was controlled by a major QTL qDH1 and was localized between the markers RM6696 and RM12047 on chromosome 1. We also developed near-isogenic lines (NIL) from the BC3F3 population, and found that the yield of homozygous NIL (NIL-2) was not significantly different compared to DJY1. Breeding value evaluation through investigation of the plant height of the progeny of NIL (NIL-2) and cultivars from different genetic background indicate that the novel semi-dwarf gene shows potential as a genetic resource for rice breeding. Copyright (C) 2018 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

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