Deyuan Meng , Aamana Batool , Yazhou Xuan , Ruiqing Pan , Na Zhang , Wei Zhang , Liya Zhi , Xiaoli Ren , Wenqing Li , Jijie Li , Yanxiao Niu , Shuzhi Zheng , Jun Ji , Xiaoli Shi , Lei Wang , Hongqing Ling , Chunhua Zhao , Fa Cui , Xigang Liu , Junming Li , Liqiang Song
{"title":"小麦千粒重稳定QTL的精细定位与验证","authors":"Deyuan Meng , Aamana Batool , Yazhou Xuan , Ruiqing Pan , Na Zhang , Wei Zhang , Liya Zhi , Xiaoli Ren , Wenqing Li , Jijie Li , Yanxiao Niu , Shuzhi Zheng , Jun Ji , Xiaoli Shi , Lei Wang , Hongqing Ling , Chunhua Zhao , Fa Cui , Xigang Liu , Junming Li , Liqiang Song","doi":"10.1016/j.cj.2023.03.007","DOIUrl":null,"url":null,"abstract":"<div><p>Thousand-kernel weight (TKW) is a measure of grain weight, a target of wheat breeding. The object of this study was to fine-map a stable quantitative trait loci (QTL) for TKW and identify its candidate gene in a recombinant inbred line (RIL) population derived from the cross of Kenong 9204 (KN9204) and Jing 411 (J411). On a high-density genetic linkage map, 24, 26 and 25 QTL were associated with TKW, kernel length (KL), and kernel width (KW), respectively. A major and stable QTL, <em>QTkw-2D</em>, was mapped to an 8.3 cM interval on chromosome arm 2DL. By saturation of polymorphic markers in its target region, <em>QTkw-2D</em> was confined to a 9.13 Mb physical interval using a secondary mapping population derived from a residually heterozygous line (F<sub>6:7</sub>). This interval was further narrowed to 2.52 Mb using <em>QTkw-2D</em> near-isogenic lines (NILs). NILs<sup>KN9204</sup> had higher fresh and dry weights than NILs<sup>J411</sup> at various grain-filling stages. The TKW and KW of NILs<sup>KN9204</sup> were much higher than those of NILs<sup>J411</sup> in field trials. By comparison of both DNA sequence and expression between KN9204 and J411, <em>TraesCS2D02G460300.1</em> (<em>TraesKN2D01HG49350</em>) was assigned as a candidate gene for <em>QTkw-2D</em>. This was confirmed by RNA sequencing (RNA-seq) of <em>QTkw-2D</em> NILs. These results provide the basis of map-based cloning of <em>QTkw-2D</em>, and DNA markers linked to the candidate gene may be used in marker-assisted selection.</p></div>","PeriodicalId":10790,"journal":{"name":"Crop Journal","volume":null,"pages":null},"PeriodicalIF":6.0000,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Fine mapping and validation of a stable QTL for thousand-kernel weight in wheat (Triticum aestivum L.)\",\"authors\":\"Deyuan Meng , Aamana Batool , Yazhou Xuan , Ruiqing Pan , Na Zhang , Wei Zhang , Liya Zhi , Xiaoli Ren , Wenqing Li , Jijie Li , Yanxiao Niu , Shuzhi Zheng , Jun Ji , Xiaoli Shi , Lei Wang , Hongqing Ling , Chunhua Zhao , Fa Cui , Xigang Liu , Junming Li , Liqiang Song\",\"doi\":\"10.1016/j.cj.2023.03.007\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Thousand-kernel weight (TKW) is a measure of grain weight, a target of wheat breeding. The object of this study was to fine-map a stable quantitative trait loci (QTL) for TKW and identify its candidate gene in a recombinant inbred line (RIL) population derived from the cross of Kenong 9204 (KN9204) and Jing 411 (J411). On a high-density genetic linkage map, 24, 26 and 25 QTL were associated with TKW, kernel length (KL), and kernel width (KW), respectively. A major and stable QTL, <em>QTkw-2D</em>, was mapped to an 8.3 cM interval on chromosome arm 2DL. By saturation of polymorphic markers in its target region, <em>QTkw-2D</em> was confined to a 9.13 Mb physical interval using a secondary mapping population derived from a residually heterozygous line (F<sub>6:7</sub>). This interval was further narrowed to 2.52 Mb using <em>QTkw-2D</em> near-isogenic lines (NILs). NILs<sup>KN9204</sup> had higher fresh and dry weights than NILs<sup>J411</sup> at various grain-filling stages. The TKW and KW of NILs<sup>KN9204</sup> were much higher than those of NILs<sup>J411</sup> in field trials. By comparison of both DNA sequence and expression between KN9204 and J411, <em>TraesCS2D02G460300.1</em> (<em>TraesKN2D01HG49350</em>) was assigned as a candidate gene for <em>QTkw-2D</em>. This was confirmed by RNA sequencing (RNA-seq) of <em>QTkw-2D</em> NILs. These results provide the basis of map-based cloning of <em>QTkw-2D</em>, and DNA markers linked to the candidate gene may be used in marker-assisted selection.</p></div>\",\"PeriodicalId\":10790,\"journal\":{\"name\":\"Crop Journal\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":6.0000,\"publicationDate\":\"2023-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Crop Journal\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2214514123000375\",\"RegionNum\":1,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"AGRONOMY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Crop Journal","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214514123000375","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"AGRONOMY","Score":null,"Total":0}
Fine mapping and validation of a stable QTL for thousand-kernel weight in wheat (Triticum aestivum L.)
Thousand-kernel weight (TKW) is a measure of grain weight, a target of wheat breeding. The object of this study was to fine-map a stable quantitative trait loci (QTL) for TKW and identify its candidate gene in a recombinant inbred line (RIL) population derived from the cross of Kenong 9204 (KN9204) and Jing 411 (J411). On a high-density genetic linkage map, 24, 26 and 25 QTL were associated with TKW, kernel length (KL), and kernel width (KW), respectively. A major and stable QTL, QTkw-2D, was mapped to an 8.3 cM interval on chromosome arm 2DL. By saturation of polymorphic markers in its target region, QTkw-2D was confined to a 9.13 Mb physical interval using a secondary mapping population derived from a residually heterozygous line (F6:7). This interval was further narrowed to 2.52 Mb using QTkw-2D near-isogenic lines (NILs). NILsKN9204 had higher fresh and dry weights than NILsJ411 at various grain-filling stages. The TKW and KW of NILsKN9204 were much higher than those of NILsJ411 in field trials. By comparison of both DNA sequence and expression between KN9204 and J411, TraesCS2D02G460300.1 (TraesKN2D01HG49350) was assigned as a candidate gene for QTkw-2D. This was confirmed by RNA sequencing (RNA-seq) of QTkw-2D NILs. These results provide the basis of map-based cloning of QTkw-2D, and DNA markers linked to the candidate gene may be used in marker-assisted selection.
Crop JournalAgricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
9.90
自引率
3.00%
发文量
638
审稿时长
41 days
期刊介绍:
The major aims of The Crop Journal are to report recent progresses in crop sciences including crop genetics, breeding, agronomy, crop physiology, germplasm resources, grain chemistry, grain storage and processing, crop management practices, crop biotechnology, and biomathematics.
The regular columns of the journal are Original Research Articles, Reviews, and Research Notes. The strict peer-review procedure will guarantee the academic level and raise the reputation of the journal. The readership of the journal is for crop science researchers, students of agricultural colleges and universities, and persons with similar academic levels.