%0 Journal Article
%T Mapping and breeding value evaluation of a semi-dominant semi-dwarf gene in upland rice
%A Dayun Tao
%A Diqiu Yu
%A Jiawu Zhou
%A Peng Xu
%A Xiaoqian Chen
%J Archive of "Plant Diversity".
%D 2018
%R 10.1016/j.pld.2018.09.001
%X 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 F1 progeny of the semi-dwarf IL-87 and DJY1 showed that the semi-dwarf phenotype was semi-dominant. 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
%K Semi-dwarf
%K QTL mapping
%K Breeding value evaluation
%U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6224660/