中国农业科学 ›› 2016, Vol. 49 ›› Issue (3): 418-428.doi: 10.3864/j.issn.0578-1752.2016.03.002

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

高抗白粉病小麦-山羊草新种质TA002的创制和遗传研究

王玉海1,何方2,鲍印广2,明东风1,董磊1,韩庆典3,李莹莹1,王洪刚2   

  1. 1枣庄学院,山东枣庄 277160
    2山东农业大学农学院/作物生物学国家重点实验室,山东泰安 271018
    3临沂大学,山东临沂 276000
  • 收稿日期:2015-11-02 出版日期:2016-02-01 发布日期:2016-02-01
  • 通讯作者: 王洪刚,E-mail:hgwang@edu.sdau.cn
  • 作者简介:王玉海,E-mail:yhwang92@163.com。何方,E-mail:hfwhere@163.com。鲍印广,E-mail:baoyinguang@163.com。王玉海、何方和鲍印广为同等贡献作者。
  • 基金资助:
    山东省博士基金(BS2011SW053)、国家自然科学基金(31301397)、植物细胞与染色体工程国家重点实验室开放课题(PCCE-KF-2014-01)、作物生物学国家重点实验室开放课题(2015KF06)山东省高等学校科技计划(J13LF11

Development and Genetic Analysis of a Novel Wheat-Aegilops Germplasm TA002 Resistant to Powdery Mildew

WANG Yu-hai1, HE Fang2, BAO Yin-guang2, MING Dong-feng1, DONG Lei1, HAN Qing-dian3, LI Ying-ying1, WANG Hong-gang2   

  1. 1Zaozhuang University, Zaozhuang 277160, Shandong
    2 College of Agronomy, Shandong Agricultural University/State Key Laboratory of Crop Biology, Tai’an 271018, Shandong
    3 Linyi University, Linyi 276000, Shandong
  • Received:2015-11-02 Online:2016-02-01 Published:2016-02-01

摘要: 【目的】小麦白粉病是世界范围内对小麦危害最严重的病害之一。培育和推广抗病品种是防治小麦白粉病最经济、有效、安全的途径。偏凸山羊草和柱穗山羊草是普通小麦的近缘物种,蕴藏着丰富的抗病、抗虫、抗逆和优质等优异基因。利用远缘杂交途径,将偏凸山羊草和柱穗山羊草的抗白粉病基因导入普通小麦,培育抗白粉病小麦新种质,为小麦白粉病抗性遗传改良提供新抗源。【方法】通过细胞学分析和结实率调查,明确TA002及其与普通小麦杂种的细胞学稳定性和育性特点。利用十二烷基磺酸钠聚丙烯酰氨凝胶电泳(odium dodecyl sulfate polyacrylamide gel electrophoresis,SDS-PAGE)及酸性聚丙烯酰胺凝胶电泳(acid polyacrylamide gel electrophoresis,A-PAGE)方法,分析TA002的高分子量麦谷蛋白亚基(high molecular weight glutenin subunit,HMW-GS)、低分子量麦谷蛋白亚基(low molecular weight glutenin subunit,LMW-GS)及醇溶蛋白亚基组成;通过白粉病菌分小种接种鉴定,明确TA002对小麦白粉病的抗性及其遗传特点;利用基因组原位杂交(genomic in situ hybridization,GISH)、多色原位杂交(multicolor genomic in situ hybridization,mc-GISH)、多色荧光原位杂交(multicolor fluorescence in situ hybridization,mc-FISH)及分子标记技术,分析明确TA002的染色体组成特点。【结果】TA002染色体数目为42条,它及其与普通小麦的杂种F1减数第一次分裂中期细胞(pollen mother cells at metaphase I,PMCs MI)均含有21个二价体,减数第一次分裂后期细胞(pollen mother cells at anaphase I,PMCs AI)中的染色体分离均衡,结实率正常。在成株期,TA002、SDAU18及其双亲偏凸山羊草和柱穗山羊草对白粉病均具有良好抗性,而烟农15对白粉病表现髙感。TA002/辉县红F1、TA002/铭贤169F1对白粉病菌种E09表现免疫,F2单株对E09的抗感分离比例符合3﹕1。种子贮藏蛋白分析结果表明,在TA002的醇溶蛋白和谷蛋白中均含有SDAU18的特有亚基,其醇溶蛋白还含有双亲没有的新型亚基。分别以单芒山羊草和尾状山羊草的基因组总DNA为探针,烟农15的基因组总DNA为封阻,对TA002的根尖细胞染色体进行基因组原位杂交,均未检测到杂交信号。同时以不同荧光素标记的乌拉尔图小麦和粗山羊草基因组总DNA为探针,拟斯卑尔脱山羊草基因组总DNA为封阻,对TA002的根尖细胞染色体进行mc-GISH,并利用以不同荧光素标记的寡核苷酸pSc119.2pTa535对TA002的根尖细胞染色体进行mc-FISH,发现TA002具有完整的A、B和D基因组,但其4A、5A、6B、7B和5D染色体在FISH带型上与亲本烟农15的对应染色体具有显著差异。分子标记检测结果表明,TA002含有来源于偏凸山羊草和柱穗山羊草的遗传物质。【结论】TA002是一个细胞学稳定、农艺性状和育性良好的小麦-山羊草渐渗系,它含有偏凸-柱穗山羊草双二倍体特有的贮藏蛋白亚基及其双亲没有的新亚基,且高抗小麦白粉病,其白粉病抗性受显性单基因控制,该基因可能是来自偏凸山羊草或柱穗山羊草的一个新的白粉病抗性基因。

关键词: 小麦, 山羊草, 白粉病, 种质系, 鉴定

Abstract: 【Objective】 Powdery mildew is one of the most devastating diseases of wheat. It is widely accepted that the most economic, efficient and safest way to control powdery mildew is breeding and planting powdery mildew resistant cultivars. Aegilops ventricosa and Aegilops cylindrica, which possess many favorable characters and good qualities such as resistance to diseases, tolerance to environmental stresses, are close-related relatives of wheat. The objective of this study was to develop novel powdery mildew resistant germplasm line via wide hybridization between common wheat and Aegilops ventricosa and/or Aegilops cylindrica for genetic improvement. 【Method】 Improved fuchsin squash and seed set examination were used to determine the cytogenetic stability and fertility of TA002. Acid polyacrylamide gel electrophoresis (A-PAGE) and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) were used to analyze the subunit composition of gliadin, high and low molecular weight glutenin (HMW-GS and LMW-GS) respectively. Genomic in situ hybridization (GISH), multicolor genomic in situ hybridization (mc-GISH), multicolor fluorescence in situ hybridization (mc-FISH) and molecular markers were employed to detect the genetic nature of TA002. Respective inoculation of powdery mildew isolates was performed to detect the reaction of TA002 to powdery mildew.【Result】 TA002 (2n = 42) showed equivalent seed set to that of common wheat. Both TA002 and its hybrid F1 with common wheat Mingxian169 housed 21 bivalents in the pollen mother cells observed at metaphase I (PMCs MI) and took on chromosomal segregation of 21 to 21 in pollen mother cells examined at anaphase I (PMCs AI). Contrast to wheat parent Yannong15 highly susceptible to powdery mildew, TA002, similar to SDAU18 and its parents Aegilops ventricosa and Aegilops cylindrica, was highly resistant to powdery mildew. Immunization and resistant-susceptible segregation of 3﹕1 was observed respectively in F1 and F2 of the crosses between TA002 and common wheats susceptible to powdery mildew. The analysis of seed storage proteins of TA002 and its parents revealed that TA002 not only had new glutenin and gliadin subunits specific to SDAU18, but also possessed a novel gliadin subunit derived from its neither parents. When probed respectively by genomic DNA of Aegilops uniaristata and Aegilops caudata in root tip cell chromosomes of TA002, no probe signals were detected. Multicolor genomic in situ hybridization (mc-GISH) and multicolor fluorescence in situ hybridization (mc-FISH) indicated that TA002 had three complete genomes (A, B and D) although five pairs of chromosomes 4A, 5A,6B, 7B and 5D in it showed significantly different FISH pattern from that of corresponding ones in Yannong15. Mc-GISH was carried out simultaneously using genomic DNA of Triticum uratu and that of Aegilops tauschii labeled with different fluoresceins as probes, and with genomic DNA of Aegilops speltoides as blocker. Mc-FISH was performed with two oligonucleotides pSc119.2 and pTa-535 fluorescing differently. Molecular marker analysis revealed TA002 housed alien genetic materials not only from Aegilops ventricosa but also from Aegilops cylindrica. 【Conclusion】TA002, derived from Aegilops ventricosa or Aegilops cylindrica with high powdery mildew resistance controlled by a single dominant gene, was found as a novel wheat-Aegilops introgression line of cytogenetic stability and good fertility. In addition, TA002 possessed novel seed storage protein subunits either specific to Aegilops ventricosa -Aegilops cylindrica amphiploid or in neither parents.

Key words: Triticum aestivum, Aegilops, powdery mildew, germplasm line, introgression line