Genetic analyses of lodging resistance and yield provide insights into post-Green-Revolution breeding in rice.
Genetic analyses of lodging resistance and yield provide insights into post-Green-Revolution breeding in rice.
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抗倒伏和产量的遗传分析为绿色革命后水稻育种提供了见解
DOI：
10.1111/pbi.13509
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发表时间：
2021-04
影响因子：
13.8
通讯作者：
Xiong L
中科院分区：
文献类型：
--
作者：
Guo Z;Liu X;Zhang B;Yuan X;Xing Y;Liu H;Luo L;Chen G;Xiong L
倒伏会降低谷类作物的产量。了解抗倒性的遗传基础有利于抗倒育种的开展。在这项研究中，524份来自水稻种质资源收集和193个重组自交系的17个LR相关性状的表型。高度和秆强度（折断秆所需的力的大小）是影响LR的两个主要因素。我们进行了全基因组关联研究（GWAS），并确定了127个LR相关位点。秆力性状和产量相关性状之间存在显著的表型相关。为了揭示它们之间的遗传关系，我们以产量相关性状为协变量，对秆力性状进行了GWAS，检测到63个与秆力和产量相关的位点。作为证据，7号染色体上关联基因座的近等基因系显示出增强的LR和产量。引人注目的是，在协变量添加的GWAS中确定了58个额外的基因座。几个LR相关基因座经历了趋异选择。连锁分析支持GWAS的结果。因此，在绿色革命后的水稻育种中，可以利用既有利于秆强又有利于穗重而不影响穗数的等位基因的渗入，或者利用高产等位基因和不影响产量的抗倒等位基因的渗入。
Lodging reduces grain yield in cereal crops. Understanding the genetic basis of lodging resistance (LR) benefits LR breeding. In the study, 524 accessions from a rice germplasm collection and 193 recombinant inbred lines were phenotyped for 17 LR‐related traits. Height and culm strength (the magnitude of applied force necessary to break the culm) were two major factors affecting LR. We conducted genome‐wide association study (GWAS) and identified 127 LR‐associated loci. Significant phenotypic correlations between culm‐strength traits and yield‐related traits were observed. To reveal the genetic relationship between them, we conducted GWAS of culm‐strength traits with adding yield‐related trait as a covariate and detected 63 loci linking culm strength and yield. As a proof, a near‐isogenic line for an association locus on chromosome 7 showed enhanced LR and yield. Strikingly, 58 additional loci were identified in the covariate‐added GWAS. Several LR‐associated loci had undergone divergent selection. Linkage analysis supported the GWAS results. We propose that introgression of alleles beneficial for both culm strength and panicle weight without negative effects on panicle number or pyramiding high‐yielding alleles and lodging‐resistant alleles without effects on yield can be employed for the post‐Green‐Revolution breeding.
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影响因子：
5.3
作者：
Li MX;Yeung JM;Cherny SS;Sham PC
通讯作者：
Sham PC
影响因子：
16.6
作者：
Crowell S;Korniliev P;Falcão A;Ismail A;Gregorio G;Mezey J;McCouch S
通讯作者：
McCouch S
影响因子：
18
作者：
Civáň P;Craig H;Cox CJ;Brown TA
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Brown TA
影响因子：
1.2
作者：
Cingolani, Pablo;Platts, Adrian;Ruden, Douglas M.
通讯作者：
Ruden, Douglas M.
影响因子：
1.9
作者：
Li, ZK;Paterson, AH;Stansel, JW
通讯作者：
Stansel, JW