文献类型： 外文期刊

作者： Cui, Di ¹ ; Zhou, Han ² ; Ma, Xiaoding ¹ ; Lin, Zechuan ² ; Sun, Linhua ² ; Han, Bing ¹ ; Li, Maomao ⁵ ; Sun, Jianchang ⁶ ; Liu, Jin ⁵ ; Jin, Guixiu ⁷ ; Wang, Xianju ⁸ ; Cao, Guilan ¹ ; Deng, Xing Wang ² ; He, Hang ² ; Han, Longzhi ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

2.Peking Univ, Sch Adv Agr Sci, Beijing 100871, Peoples R China

3.Peking Univ, Sch Life Sci, State Key Lab Prot & Plant Gene Res, Beijing 100871, Peoples R China

4.Peking Univ, Inst Adv Agr Sci, Weifang 261325, Shandong, Peoples R China

5.Jiangxi Acad Agr Sci, Rice Res Inst, Nanchang 330200, Jiangxi, Peoples R China

6.Ningxia Acad Agr & Forestry Sci, Inst Crop Res, Yongning 750105, Peoples R China

7.Linyi Acad Agr Sci, Rice Res Inst, Linyi 276012, Shandong, Peoples R China

8.Rice Res Inst Liaoning Prov, Shenyang 110161, Peoples R China

关键词： Geng/japonica rice breeding; intersubspecific hybridization; introgression; GWAS; pedigree

期刊名称：PLANT COMMUNICATIONS （ 影响因子：8.625； 五年影响因子：8.625 ）

ISSN： 2590-3462

年卷期： 2022 年 3 卷 3 期

页码：

收录情况： SCI

摘要： Hybridization between Xian/indica (XI) and Geng/japonica (GJ) rice combined with utilization of plant ideotypes has greatly contributed to yield improvements in modern GJ rice in China over the past 50 years. To explore the genomic basis of improved yield and disease resistance in GJ rice, we conducted a large-scale genomic landscape analysis of 816 elite GJ cultivars representing multiple eras of germplasm from China. We detected consistently increasing introgressions from three XI subpopulations into GJ cultivars since the 1980s and found that the XI genome introgressions significantly increased the grain number per panicle (GN) and decreased the panicle number per plant. This contributed to the improvement of plant type during modern breeding, changing multi-tiller plants tomoderate tiller plants with a large panicle size and increasing the blast resistance. Notably, we found that key gene haplotypes controlling plant architecture, yield components, and pest and disease resistance, including IPA1, SMG1, DEP3, Pib, Pi-d2, and Bph3, were introduced from XI rice by introgression. By GWAS analysis, we detected a GN-related gene Gnd5, which had been consistently introgressed from XI into GJ cultivars since the 1980s. Gnd5 is a GRAS transcription factor gene, and Gnd5 knockout mutants showed a significant reduction in GN. The estimated genetic effects of genes varied among different breeding locations, which explained the distinct introgression levels of XI gene haplotypes, including Gnd5, DEP3, etc., to these GJ breeding pedigrees. These findings reveal the genomic contributions of introgressions from XI to the trait improvements of GJ rice cultivars and provide new insights for future rice genomic breeding.