Characterization of Thinopyrum Species for Wheat Stem Rust Resistance and Ploidy Level
Characterization of Thinopyrum Species for Wheat Stem Rust Resistance and Ploidy Level
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小麦茎锈病抗性和倍性水平的Thinopyrum 物种表征
DOI：
10.2135/cropsci2014.02.0093
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发表时间：
2014-11
期刊：
影响因子：
2.3
通讯作者：
Zheng Q., Klindworth D. L., Friesen T. L., Liu A.,
中科院分区：
文献类型：
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作者：
Zheng Q., Klindworth D. L., Friesen T. L., Liu A.,
在小麦族（Triticeae）中，几种偃麦草属（Thinopyrum）物种已被用作对茎锈病（由禾柄锈菌（Puccinia graminis）引起）的抗性来源。F.小麦种& E. Henn.缩写为Pgt）和其它小麦（Triticum aestivum L.）疾病为了鉴定对Pgt小种TTKSK（Ug 99）的新抗性来源，我们评估和表征了属于5个偃麦草属物种的242份材料的茎锈病抗性，包括海滩冰草[Th. bessarabicum（Savul. & Rayss）A. Love]、二倍体高冰草[Th. elongatum（Host）D.R. Dewey]、中间冰草[Th. intermedium（Host）Barkworth & D. R. Dewey]、沙咳或海冰草[Th.芥菜（L.）A. Love]和十倍体高冰草[Th. ponticum（Podp.）巴克沃斯公司Dewey]。评价这些种质对9个Pgt小种（TTKSK、TTTTF、TRTTF、RTQQC、QFCSC、TCMJC、TPMKC、TMLKC和TPPKC）的幼苗反应，用与来自偃麦草属物种的4个茎锈病抗性基因（Sr24、Sr25、Sr26和Sr43）连锁的分子标记进行基因分型，并检查倍性水平。所有加入，但一个（Th。elongatum PI 531718）对全部或大部分小种都有抗性。大部分的Th。elongatum和Th. ponticum材料对所有小种均表现出近免疫性，而其它3个种（Th. bessarabicum，Th. intermedium和Th. junceum）具有从近免疫到中等抗性的不同抗性水平。分子标记分析表明，大多数标记似乎是种或属特异性的，而不是与感兴趣的基因，因此基因分型分析的价值有限。根据倍性水平对材料的感病类型进行了比较，结果表明，倍性水平越高，抗秆锈性越高。本研究结果证实了偃麦草属植物是一个丰富的抗秆锈资源。
In the tribe Triticeae, several Thinopyrum species have been used as sources of resistance to stem rust (caused by Puccinia graminis Pers.:Pers. f. sp. tritici Eriks. & E. Henn., abbreviated as Pgt) and other wheat (Triticum aestivum L.) diseases. To identify novel sources of resistance to Pgt race TTKSK (Ug99), we evaluated and characterized the stem rust resistance of 242 accessions belonging to five Thinopyrum species, including beach wheatgrass [Th. bessarabicum (Savul. & Rayss) A. Love], diploid tall wheatgrass [Th. elongatum (Host) D.R. Dewey], intermediate wheatgrass [Th. intermedium (Host) Barkworth & D. R. Dewey], sand cough or sea wheatgrass [Th. junceum (L.) A. Love], and decaploid tall wheatgrass [Th. ponticum (Podp.) Barkworth & D.R. Dewey]. These accessions were evaluated for seedling reactions to nine Pgt races (TTKSK, TTTTF, TRTTF, RTQQC, QFCSC, TCMJC, TPMKC, TMLKC, and TPPKC), genotyped with molecular markers linked to four stem rust resistance genes (Sr24, Sr25, Sr26, and Sr43) derived from Thinopyrum species, and examined for ploidy levels. All accessions but one (Th. elongatum PI 531718) were resistant to all or most races. Most of the Th. elongatum and Th. ponticum accessions showed near-immunity to all of the races while the accessions of the other three species (Th. bessarabicum, Th. intermedium, and Th. junceum) had varied levels of resistance ranging from near immunity to moderate resistance. Molecular marker analysis showed that most of the markers appeared to be species- or genus-specific rather than linked to a gene of interest, and thus genotyping analysis was of limited value. Comparisons of infection types of accessions based on ploidy level suggested that higher ploidy level was associated with higher levels of stem rust resistance. The results from this study substantiate that the Thinopyrum species are a rich source of stem rust resistance.
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影响因子：
--
作者：
K. Michalová;Z. Zemanová;J. Březinová
通讯作者：
K. Michalová;Z. Zemanová;J. Březinová
影响因子：
5.4
作者：
Liu, Sixin;Yu, Long-Xi;Anderson, James A.
通讯作者：
Anderson, James A.
影响因子：
5.4
作者：
Jiming Jiang;B. Friebe;B. Gill
通讯作者：
Jiming Jiang;B. Friebe;B. Gill
影响因子：
2.3
作者：
J. Schulz-Schaeffer;S. R. Chapman;Ma Yuan
通讯作者：
J. Schulz-Schaeffer;S. R. Chapman;Ma Yuan
DOI：
--
发表时间：
1944
期刊：
--
影响因子：
--
作者：
E. C. Stakman;D. Stewart;W. Q. Loegering
通讯作者：
E. C. Stakman;D. Stewart;W. Q. Loegering