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The Crop Journal | 南京农大从硬粒小麦–簇毛麦双二倍体中高通量发掘小麦条锈病抗性种质资源并定位抗病基因

  • 2026-05-29 18:46:14
The Crop Journal | 南京农大从硬粒小麦–簇毛麦双二倍体中高通量发掘小麦条锈病抗性种质资源并定位抗病基因

小麦条锈病是由条形柄锈菌小麦专化型(Puccinia striiformis f. sp. triticiPst)引发的真菌病害,严重威胁全球小麦生产安全。随着病原菌生理小种不断进化,栽培小麦中有效抗性基因资源日益匮乏,从小麦野生近缘种中挖掘新的基因、储备有效的抗性资源,成为抗病育种可持续发展的途径。簇毛麦Haynaldia villosa, 2n = 2x = 14, VV)是小麦三级基因库中的重要成员,蕴含丰富的抗病、抗逆等优异基因资源。南京农业大学通过远缘杂交与秋水仙素加倍,创制了一批硬粒小麦簇毛麦双二倍体材料,为规模化、系统化、多元化发掘远缘优异基因奠定了材料基础

近日,南京农业大学农学院The Crop Journal在线发表了题为High-throughput identification of stripe rust resistance resources and genetic mapping of a new gene from Triticum durumHaynaldia villosa amphiploids的研究论文。研究通过高通量表型鉴定、等位性测验、BSE-Seq、遗传定位等技术,系统发掘了一批抗条锈病双二倍体材料,并定位到一个位于簇毛麦2VS染色体臂的新抗病基因Yr2VS,通过回交创制携带Yr2VS小麦簇毛麦异染色体系,为小麦抗条锈病分子育种提供了宝贵新资源。

为了高通量挖掘簇毛麦中的抗条锈病基因,研究团队对78份硬粒小麦簇毛麦双二倍体进行苗期条锈病抗性鉴定。结果显示,7个不同簇毛麦品系衍生的11份双二倍体对条锈生理小种CYR32表现高抗至免疫(图1A,其中STH55‑1CYR32CYR34两个毒性小种均表现稳定高抗,是优异的抗病供体材料(图1B。研究选取7个不同簇毛麦品系的抗病双二倍体进行条锈菌组织学观察,发现这些抗病双二倍体材料均能显著抑制条锈菌菌丝生长,且不同的双二倍体菌丝发育进程存在明显差异。同时,等位性测验表明,STH55-1的抗性基因与STH63-1可能为等位基因,与STH36-3STH59-1的抗性基因不等位,而与STH50-4STH65-4的抗性基因紧密连锁,说明簇毛麦中存在丰富的条锈病抗性位点。

研究进一步利用抗病、感病亲本构建F2F2:3遗传群体,结合BSE-Seq,将该抗病基因定位于簇毛麦2V染色体臂,命名为Yr2VS。该基因定位于分子标记InDel411InDel1393之间约5.6 cM的遗传区间,对应簇毛麦参考基因组1.84 Mb物理区间(图1E。转录组与候选基因分析显示,Yr2VS定位区间内包含79个高置信基因,其中多个NLR抗病相关基因受条锈菌诱导显著上调,为后续基因克隆与功能解析奠定了基础。通过回交转育成功将2VS染色体臂导入普通小麦背景,分子标记和表型鉴定表明,携带2VS染色体臂的后代材料均表现高抗条锈病,证明Yr2VS具有良好的育种利用潜力(图1F

该研究建立了一套双二倍体高通量创制抗病资源系统筛选新基因快速定位外源片段精准导入的野生近缘种基因挖掘技术体系,显著提升了小麦野生种质的基因发掘效率。

硬粒小麦簇毛麦双二倍体中抗条锈病基因的鉴定、定位与利用

作者和基金项目

南京农业大学博士研究生刘晋宏和硕士研究生马岑为该文共同第一作者,曹爱忠教授和邢莉萍教授为共同通信作者。该研究得到国家重点研发计划项目(2025YFF1000300)、国家自然科学基金项目(32472098)和江苏省种业振兴揭榜挂帅项目(JBGS [2021] 013)等资助。

相关阅读

The Crop Journal | 南京农大创制高效协同改良品质和抗性的小麦–簇毛麦T1DL·1VS易位系新种质

The Crop Journal | 王秀娥团队发现簇毛麦CERK1-V异源过量表达提高小麦抗病性

The Crop Journal | 四川农科院杨武云团队揭示五倍体杂交促进节节麦基因组向四倍体小麦渐渗

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The Crop Journal (《作物学报(英文版)》)是中国科协主管,中国作物学会、中国农业科学院作物科学研究所和中国科技出版传媒股份有限公司共同主办的学术期刊,创刊于2013年10月。办刊宗旨为刊载作物科学相关领域最新成果,开展国际学术交流,促进我国作物科学研究水平及国际影响力的提升。主要刊登作物遗传与育种、作物基因组与分子育种、作物驯化与重要种质资源进化、作物分子生理与生态、作物栽培与耕作系统、作物与微生物互作、作物与环境互作及其适应性、作物基因组进化与选择、作物重要农艺性状发育、生物技术/工具/大数据等领域以第一手资料撰写的研究论文、研究简报以及专题综述等。2024年The Crop Journal的SCI影响因子为5.6,在JCR农学和植物学两个学科位于Q1区,并位列中科院分区农林类期刊一区。2019–2023年获中国科技期刊卓越行动计划重点项目资助,2024–2028年获中国科技期刊卓越行动计划二期英文梯队项目资助。

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  1. CONNECT:[ UseTime:0.000445s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000666s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000301s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000267s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000533s ]
  6. SELECT * FROM `set` [ RunTime:0.000197s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000593s ]
  8. SELECT * FROM `article` WHERE `id` = 573291 LIMIT 1 [ RunTime:0.003787s ]
  9. UPDATE `article` SET `lasttime` = 1780099241 WHERE `id` = 573291 [ RunTime:0.002728s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000721s ]
  11. SELECT * FROM `article` WHERE `id` < 573291 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001187s ]
  12. SELECT * FROM `article` WHERE `id` > 573291 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001282s ]
  13. SELECT * FROM `article` WHERE `id` < 573291 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002602s ]
  14. SELECT * FROM `article` WHERE `id` < 573291 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004458s ]
  15. SELECT * FROM `article` WHERE `id` < 573291 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003965s ]
0.108743s