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Min-na YANG Ph D candidate Zhi-bin XU Mei-nan WANG Jian-rong SONG Jin-xue JING Zhen-qi LI 《中国农业科学(英文版)》2008,7(8):901-906
Stripe rust is one of the most important diseases of wheat worldwide. Inheritance of stripe rust resistance and mapping of resistance gene with simple sequence repeat （SSR） markers are studied to formulate efficient strategies for breeding cultivars resistant to stripe rust. Zhongliang 88375, a common wheat line, is highly resistant to all three rusts of wheat in China. The gene conferring rust disease was deduced originating from Elytrigia intermedium. Genetic analysis of Zhongliang 88375 indicated that the resistance to PST race CYR31 was controlled by a single dominant gene, temporarily designated as Yr88375. To molecular map Yr88375, a F2 segregating population consisting of 163 individuals was constructed on the basis of the hybridization between Zhongliang 88375 and a susceptible wheat line Mingxian 169; 320 SSR primer pairs were used for analyzing the genetic linkage relation. Six SSR markers, Xgwm335, Xwmc289, Xwmc810, Xgdmll6, Xbarc59, and Xwmc783, are linked to Yr88375 as they were all located on chromosome 5BL Yr88375 was also located on that chromosome arm, closely linked to Xgdmll6 and Xwmc810 with genetic distances of 3.1 and 3.9 cM, respectively. The furthest marker Xwmc783 was 13.5 cM to Yr88375. Hence, pedigree analysis of Zhongliang 88375 combined with SSR markers supports the conclusion that the highly resistance gene Yr88375 derived from Elytrigia intermedium is a novel gene for resistance to stripe rust in wheat. It could play an important role in wheat breeding programs for stripe rust resistance. 相似文献
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Inheritance and Molecular Mapping of Stripe Rust Resistance Gene Yr88375 in Chinese Wheat Line Zhongliang 88375 总被引：2，自引：0，他引：2
Stripe rust is one of the most important diseases of wheat worldwide. Inheritance of stripe rust resistance and mapping of resistance gene with simple sequence repeat (SSR) markers are studied to formulate efficient strategies for breeding cultivars resistant to stripe rust. Zhongliang 88375, a common wheat line, is highly resistant to all three rusts of wheat in China. The gene conferring rust disease was deduced originating from Elytrigia intermedium. Genetic analysis of Zhongliang 88375 indicated that the resistance to PST race CYR31 was controlled by a single dominant gene, temporarily designated as Yr88375. To molecular map Yr88375, a F2 segregating population consisting of 163 individuals was constructed on the basis of the hybridization between Zhongliang 88375 and a susceptible wheat line Mingxian 169; 320 SSR primer pairs were used for analyzing the genetic linkage relation. Six SSR markers, Xgwm335, Xwmc289, Xwmc810, Xgdm116, Xbarc59, and Xwmc783, are linked to Yr88375 as they were all located on chromosome 5BL. Yr88375 was also located on that chromosome arm, closely linked to Xgdmll6 and Xwmc810 with genetic distances of 3.1 and 3.9 cM, respectively. The furthest marker Xwmc783 was 13.5 cM to Yr88375. Hence, pedigree analysis of Zhongliang 88375 combined with SSR markers supports the conclusion that the highly resistance gene Yr88375 derived from Elytrigia intermedium is a novel gene for resistance to stripe rust in wheat. It could play an important role in wheat breeding programs for stripe rust resistance. 相似文献
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【目的】小麦品系西农1163-4高抗小麦叶锈、条锈和白粉病,综合农艺性状良好。明确该小麦品系中所含的抗叶锈病基因及遗传特点,找到与其紧密连锁的分子标记,有利于抗病基因利用和培育抗病新品种。【方法】将西农1163-4与感病品种Thatcher杂交,获得F1、F2代群体,利用中国叶锈菌优势小种THTT进行苗期抗性鉴定和抗性遗传分析;采用SSR技术对西农1163-4所携带的抗叶锈基因进行分子标记研究,共筛选了1 273对SSR引物。【结果】小麦品系西农1163-4对多个叶锈菌小种具有良好的抗病性,对THTT的抗性是由1个显性基因控制,该基因暂命名为LrXi。获得了与LrXi紧密连锁的3个微卫星分子标记Xbarc8、Xgwm582、Xwmc269和1个STS标记(ω-secali/Glu-B3),将LrXi定位于小麦1BL染色体上。距离最近的2个微卫星位点是Xgwm582、Xbarc8,与抗叶锈基因间的遗传距离分别为2.3 cM和3.2 cM。【结论】LrXi位于1BL染色体,抗叶锈表现不同于所有已知抗叶锈病基因,该基因的发现将有利于丰富中国抗叶锈病基因资源,为培育持久抗病品种奠定基础。 相似文献
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小麦品系西农1163-4抗叶锈病基因的遗传分析和分子作图 总被引：2，自引：1，他引：1
【目的】小麦品系西农1163-4高抗小麦叶锈、条锈和白粉病,综合农艺性状良好。明确该小麦品系中所含的抗叶锈病基因及遗传特点,找到与其紧密连锁的分子标记,有利于抗病基因利用和培育抗病新品种。【方法】将西农1163-4与感病品种Thatcher杂交,获得F1、F2代群体,利用中国叶锈菌优势小种THTT进行苗期抗性鉴定和抗性遗传分析;采用SSR技术对西农1163-4所携带的抗叶锈基因进行分子标记研究,共筛选了1 273对SSR引物。【结果】小麦品系西农1163-4对多个叶锈菌小种具有良好的抗病性,对THTT的抗性是由1个显性基因控制,该基因暂命名为LrXi。获得了与LrXi紧密连锁的3个微卫星分子标记Xbarc8、Xgwm582、Xwmc269和1个STS标记(ω-secali/Glu-B3),将LrXi定位于小麦1BL染色体上。距离最近的2个微卫星位点是Xgwm582、Xbarc8,与抗叶锈基因间的遗传距离分别为2.3 cM和3.2 cM。【结论】LrXi位于1BL染色体,抗叶锈表现不同于所有已知抗叶锈病基因,该基因的发现将有利于丰富中国抗叶锈病基因资源,为培育持久抗病品种奠定基础。 相似文献
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Stripe rust, caused by Puccinia striiformis f. sp. tritici （Pst）, is one of the most damaging diseases of common wheat （Triticum aestivum L.）. Wheat variety PIW138 introduced from Pakistan is resistant to the currently prevailing Pst race CYR32 in China. In this study, the bulked segregant analysis （BSA） method and simple sequence repeat （SSR） markers were used to map the stripe rust resistance gene in PIW138. The resistant and susceptible DNA bulks were prepared from the segregating F2 population of the cross between Thatcher, a susceptible variety as the female parent, and PIW138 as the male parent. The segregation of resistant and susceptible F2 plants inoculated with CYR32 indicated that single dominant gene determined the reactions of PIW138 line and temporarily designated as YrP138. Total 200 SSR primers were screened, and 4 SSR markers, Xwmc52, Xbarc61, Xgwm268, and Xgwm153, on chromosome 1B were found to be polymorphic between the resistant and the susceptible DNA bulks as well as their parents. Genetic linkage was tested on the segregating F2 population with 259 plants, including 196 resistant and 63 susceptible plants. All 4 SSR markers were linked to the stripe rust resistance gene in PIW138. The genetic distances of Xwmc52, Xbarc61, Xgwm268, and Xgwm153 to the resistance gene were 29.8, 6.2, 6.8, and 8.2 cM, respectively. 相似文献
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CH223是一个衍生于中间偃麦草的多抗性小偃麦种质系,通过感病的小麦品种与八倍体小偃麦TAI7047杂交、回交选育而成。抗性鉴定表明,CH223对我国当前小麦条锈病的流行小种CYR32,CYR33均有良好抗性。利用CH223与感病品种(系)的F2,F2∶3和BC1抗性分离群体进行抗性遗传分析,发现其条锈病抗性来自中间偃麦草,且由1对显性基因控制,暂时命名为YrCH223。用CYR32对来自台长29×CH223的221个F2植株进行接种鉴定,并构建抗、感DNA池。共筛选738对SSR引物,发现5对共显性SSR标记与抗病基因连锁,位置顺序为:Xgwm540-Xbarc1096-YrCH223-Xwmc47-Xwmc310-Xgpw7272,遗传距离分别为21.9,8.0,7.2,12.5,11.3 cM。进一步利用中国春缺体-四体和双端体材料扩增鉴定,将YrCH223定位于小麦4B染色体的长臂上(4BL)。经F2∶3群体验证,5个标记与YrCH223连锁。迄今为止,在4BL上未发现有公开报道的抗小麦条锈病基因。因此,基于抗病基因所在的染色体位置与来源,推断YrCH223是一个新的抗条锈病基因。 相似文献
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小麦品种N.Strampelli的抗条锈基因定位与分子作图 总被引：1，自引：0，他引：1
【目的】N.Strampelli是一个十分重要的持久抗源材料,研究其抗病性遗传特点,抗条锈病基因的定位与分子作图,对揭示品种持久抗病性遗传机制,科学有效利用该优质抗源材料选育持久抗病性品种具有重要意义。【方法】将N.Strampelli分别与铭贤169和中国春杂交、回交并对双亲及其杂交后代进行遗传分析。以中国春单体系作母本分别与N.Strampelli杂交获得经镜鉴的F1代,F1代套袋自交获得F2代单体材料并进行抗病基因染色体定位。用于遗传分析和单体定位的小麦条锈菌为SU-4、CYR31、CYR29-mut3。选用普通小麦的208对SSR分子标记对N.Strampelli及铭贤169的基因组DNA进行PCR扩增和电泳分析。【结果】N.Strampelli对SU-4菌系的抗病性由2对隐性基因重叠或独立控制;对CYR31菌系的抗病性由2对隐性基因互补控制;对CYR29-mut3的抗病性由一对隐性核基因控制,并将该基因暂命名为YrN.S。建立了与YrN.S连锁的3个微卫星标记Xgwm499、Xwmc415、Xwmc537,其与YrN.S的遗传距离分别为7.6、5.4和10.7cM,将YrN.S定位于小麦5BL上。【结论】YrN.S是一个与已知抗条锈病基因不同的新基因。 相似文献
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【目的】明确中国小麦条锈菌重要鉴别寄主维尔的抗条锈病基因及其遗传特点,建立与其连锁的微卫星标记,将病菌小种监测和抗病性分析提高到基因水平。【方法】由维尔为基因供体转育而成的含有小麦重要抗条锈基因YrVir1的近等基因系Taichung29*6/YrVir1,用小麦条锈菌单胞菌系2E16对近等基因系Taichung29*6/YrVir1、轮回亲本Taichung29及其杂交后代进行遗传分析;选用YrVir1所在2B染色体上的141对引物对近等基因系和轮回亲本的基因组DNA进行SSR分析。【结果】近等基因系Taichung29*6/YrVir1对2E16的抗病性由1对显性基因控制;引物Xbarc349在近等基因系与轮回亲本间稳定扩增出特异性DNA片段,同时在近等基因系和基因供体维尔间存在相同扩增片段,经F2代群体200个抗、感单株检测证实,Xbarc349标记位点与抗条锈病基因YrVir1连锁,遗传距离为4.2 cm。【结论】Xbarc349引物扩增出的特异性DNA片段可作为抗条锈病基因YrVir1的SSR标记;根据小麦SSR遗传图谱,将YrVir1基因定位在小麦2B染色体上。 相似文献
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小麦白粉病抗病新基因PmHNK的遗传分析和分子标记定位 总被引：2，自引：0，他引：2
【目的】周98165对河南省当前流行白粉菌生理小种具有较好的抗性,并且综合农艺性状优良。明确其抗白粉病基因及遗传特性,筛选与其紧密连锁的分子标记,为抗白粉病育种提供抗源和理论支撑。【方法】将周 98165与中国春杂交、自交、测交,对双亲及其杂交后代进行苗期鉴定,用小麦白粉病菌08B1进行遗传分析,利用SSR、EST-SSR技术对双亲及抗感池进行筛选和电泳分析,并结合中国春缺四体材料进行染色体定位。【结果】周98165对3个白粉菌高毒力小种抗性良好,其抗病性受1对显性核基因控制,将该基因暂命名为PmHNK。筛选了与PmHNK 连锁的5个微卫星标记,在遗传图谱上的顺序为Xbarc77、Xgwm547、Xwmc326、Xgwm299、PmHNK、Xgwm108,Xgwm299和Xgwm108分别为PmHNK两侧距离最近的标记,图距分别为4.2 cM、5.6 cM,最远标记Xbarc77与PmHNK图距为10.6 cM,并将PmHNK 定位于3BL。【结论】抗病鉴定、遗传分析结合分子标记分析结果表明,PmHNK是一个白粉病抗病新基因。 相似文献
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中梁12小麦抗条锈病基因遗传分析与SSR分子定位 总被引：1，自引：0，他引：1
中梁12具有抗逆性强、适应性广、抗条锈性强等许多优良的生物学特性。为明确其抗条锈性及遗传规律,利用当前流行的中国条锈菌小种CYR30对抗病品种中梁12与感病品种铭贤169及其杂交后代代F1、F2、F3和BC1代进行苗期抗条锈性遗传分析,并对其抗条锈基因进行SSR分子标记。结果表明,中梁12对CYR30小种具有良好的抗性,由1对显性基因控制,暂命名为YrZh12。该基因与位于小麦7AL染色体上的4个SSR位点Xwmc695、Xcfd20、Xbarc121和Xbarc49连锁,其中最近的侧翼位点为Xcfd20和Xbarc121,其遗传距离分别是3.1cM和4.9cM。系谱分析YrZh12基因可能来自抗引655,由于7AL染色体上没有其他抗条锈病基因,YrZh12可能是一个抗条锈病的新基因。 相似文献
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《农业科学学报》2016,(11)
Stripe rust is a serious foliar disease posing a grave threat to wheat production worldwide. The most economical and environmentally friendly way to control this disease is to breed and deploy resistant cultivars. Zhongmai 175 is an elite winter wheat cultivar conferring resistance to a broad spectrum of Puccinia striiformis f. sp. tritici(Pst) races. To identify the resistance gene in the cultivar, genetic analysis was conducted using the parents, F1, F2 and F2:3 populations derived from the cross of Lunxuan 987/Zhongmai 175. Segregations in the F2 and F2:3 populations indicated a single dominant gene conferring resistance to stripe rust in Zhongmai 175, temporarily designated Yr ZM175. Bulked segregant analysis(BSA) with wheat i Select 90 K SNP array determined a preliminary location of Yr ZM175. Subsequently, Yr ZM175 was mapped on chromosome 2AS using simple sequence repeats(SSR), expressed sequence tags(EST) and newly-developed kompetitive allele specific PCR(KASP) markers, being flanked by Xgwm636 and Xwmc382 at genetic distances of 4.9 and 8.1 c M, respectively. Comparison of reaction patterns of Yr ZM175 on 23 Pst races or isolates and pedigree analysis with other genes on chromosome 2AS suggested that it is likely to be a new gene for resistance to stripe rust. The resistance gene and linked molecular markers will be useful in wheat breeding targeting for the improvement of stripe rust resistance. 相似文献
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采用条锈病优势小种条中33（CYR33）对陕西关中地区小麦主要品种进行苗期抗病性鉴定,并采用SSR分子标记对抗病品种进行遗传多样性分析,以期了解陕西抗条锈品种的遗传多样性,为深入发掘优异的抗性基因资源及利用这些抗性基因,培育优良抗条锈新品种奠定基础。结果表明,在94个小麦品种中,对目前条锈病优势小种CYR33具有抗性的品种有24个,占25.5%。24个抗条锈小麦品种材料的遗传相似系数(GS)平均值为0.590,其变辐为0.338～0.824。这些结果说明,陕西关中地区的小麦抗条锈病品种具有较丰富的遗传多样性。 相似文献
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中国小麦品种兰天9号慢叶锈性QTL分析 总被引：1，自引：0，他引：1
【目的】由小麦叶锈菌（Puccinia triticina）引起的小麦叶锈病是影响小麦稳产、高产的一种重要真菌病害。目前防治小麦叶锈病最经济、安全、有效的方法是种植抗病品种。中国小麦品种兰天9号苗期对大多数叶锈菌小种表现感病,成株期对小麦叶锈菌则表现为明显的慢锈性。研究旨在分析中国小麦品种兰天9号的成株抗叶锈性,发掘其中含有的QTL,并利用分子标记进行定位,为小麦分子育种提供理论基础。【方法】利用抗病亲本兰天9号和感病亲本辉县红杂交获得到197个家系的F2:3群体,2011-2014年连续3年在河北保定种植,并利用3个叶锈菌生理小种混合菌种（THTT、THTS、THTQ）进行田间接菌,小麦成株期调查最终发病严重度,获得表型数据。利用1 232对SSR标记对兰天9号、辉县红以及F2:3群体进行基因检测,获得基因型数据。结合表型数据和基因型数据,利用Map Manager QTXb20创建连锁图、QTL Icimapping 3.2软件进行抗叶锈病QTL分析。【结果】检测到5个QTL,其中位于2B染色体上的QTL暂命名为QLr.hbau-2BS,在连续两年的数据结果中都被检测到,解释的遗传变异分别为6.0%和9.1%;标记区间分别为Xbarc55-Xgwm148和Xgwm429-Xwmc154;LOD值分别为2.6和3.46;加性效应分别为-6.1和-8.7;显性效应分别为3.03和3.4。1B染色体上1个QTL暂命名为QLr.hbau-1BL.2,连续两年被检测到,解释的遗传变异分别为7.7%和10.7%;标记区间为Xwmc766-Xbarc269;LOD值分别为2.5和3.1;加性效应分别为-1.0和-1.1;显性效应分别为-13.0和-14.9。其他3个QTL只在一个年份被检测到,1B染色体上暂命名为QLr.hbau-1BL.1、4B上暂命名为QLr.hbau-4BS、3A上暂命名为QLr.hbau-3A,均在2011-2012年度检测到,解释的遗传变异分别为11.7%、8.5%、5.6%;标记区间分别为Xbarc80-Xwmc728、Xgwm495-Xwmc652和Xgwm161-Xbarc86;LOD值分别为5.1、4.0和2.8;加性效应分别为6.5、-5.5和-3.1;显性效应分别为-6.5、6.2和6.6。QLr.hbau-1BL.1来源于感病亲本辉县红,其余4个QTL来源于兰天9号。【结论】结合田间表型数据和基因型数据,检测到位于1B、2B、3A、4B染色体上5个控制成株抗叶锈的QTL。 相似文献
15.
Jing Yin Guangjin Wang Fengming Ma Hongji Zhang Jialei Xiao Yan Sun Yanling Diao Jinghua Huang Qiang Guo 《Frontiers of Agriculture in China》2008,2(2):131-136
Wheat (Triticum aestivum L.) stem rust caused by Puccinia graminis f. sp. tritici is one of the main diseases of wheat worldwide. Wheat mutant line D51, which forms a highly susceptive cultivar ‘L6239’ to
the three races notated and cultured with immature embryos, shows resistance to prevailing races 21C3CPH, 21C3CKH, and 21C3CTR
of P. graminis f. sp. tritici in China. In this study, the number and the expression stages of the resistance genes in mutant D51 were studied using inoculation
identification and microsatellite (SSR) marker analysis. Two F1 populations from the crosses of D51 × L6239 (60 individuals) and D51 × Chinese Spring (60 individuals), their F2 populations (185 and 175 individuals respectively) at the seedling stage, and one F2 population derived from the cross of D51 × L6239 (194 individuals) at the adult stage were inoculated with pathogen race
21C3CPH to test for resistance. All F1 individuals of the two crosses were immune to stem rust at both seedling and adult stages. The response pattern of the three
F2 populations showed that the R:S segregation ratio was 3:1, suggesting that the stem rust resistance of D51 is controlled
by a single dominant gene, and is expressed during the entire growth period. The identification of the stem rust resistance
by the F3 progeny test confirmed the credibility of the F2 population test. Segregating populations and small population analyses were used to identify chromosomal regions and molecular
markers linked to the gene by the SSR marker method. A total of 675 SSR markers and 185 individuals of the D516L6239 F2 population
were used to search genetically linked markers to the target gene. Using Mapmaker 3.0 and Map-draw with Kosambi’s function
and other options set at default values, molecular mapping revealed that the gene was located on chromosome 5DS, linked with
and flanked by two SSR markers, Xgwm190 and Xwmc150, at 18.58 and 21.33 cM, respectively. It has been reported that only one
stem rust resistant gene, Sr30, is located on the wheat chromosome 5DL, and that it has no resistance to 34C2MKK and 34C2MFK, while the parent L6239 of
mutant D51 has no resistance to 21C3CPH, 21C3CTK and 21C3CTR, but has resistance to 34C2MKK and 34C2MFK. The results above
indicate that the gene identified in the study might be a novel resistance gene to stem rust, tentatively designated as SrD51.
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Translated from Acta Agronomica Sinica, 2007, 33(8): 1262–1266 [译自: 作物学报] 相似文献
16.
Zhen-zhong WANG Jing-zhong XIE Li GUO De-yun ZHANG Gen-qiao LI Ti-lin FANG Yong-xing CHEN Jun LI Qiu-hong WU Ping LU Miao-miao LI Hai-bin WU Huai-zhi ZHANG Yan ZHANG Wu-yun YANG Ming-cheng LUO Fahima Tzion Zhi-yong LIU 《农业科学学报》2018,17(6):1267-1275
Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is a devastating disease that can cause severe yield losses. Identification and utilization of stripe rust resistance genes are essential for effective breeding against the disease. Wild emmer accession TZ-2, originally collected from Mount Hermon, Israel, confers near-immunity resistance against several prevailing Pst races in China. A set of 200 F6:7 recombinant inbred lines (RILs) derived from a cross between susceptible durum wheat cultivar Langdon and TZ-2 was used for stripe rust evaluation. Genetic analysis indicated that the stripe rust resistance of TZ-2 to Pst race CYR34 was controlled by a single dominant gene, temporarily designated YrTZ2. Through bulked segregant analysis (BSA) with SSR markers, YrTZ2 was located on chromosome arm 1BS flanked by Xwmc230 and Xgwm413 with genetic distance of 0.8 cM (distal) and 0.3 cM (proximal), respectively. By applying wheat 90K iSelect SNP genotyping assay, 11 polymorphic loci (consisting of 250 SNP markers) closely linked to YrTZ2 were identified. YrTZ2 was further delimited into a 0.8-cM genetic interval between SNP marker IWB19368 and SSR marker Xgwm413, and co-segregated with SNP marker IWB28744 (co-segregated with 28 SNP). Comparative genomics analyses revealed high level of collinearity between the YrTZ2 genomic region and the orthologous region of Aegilops tauschii 1DS. The genomic region between loci IWB19368 and IWB31649 harboring YrTZ2 is orthologous to a 24.5-Mb genomic region between AT1D0112 and AT1D0150, spanning 15 contigs on chromosome 1DS. The genetic and comparative maps of YrTZ2 provide a framework for map-based cloning and marker-assisted selection of YrTZ2. 相似文献
17.
Yellow rust of wheat （caused by Puccinia striiformis Westend. f. sp. tritici Eriks.） has been periodically epidemic and severely damaged wheat production in China. The development of resistant cultivars could be an effective way to reduce yield losses of wheat caused by yellow rust. Rust reaction tests and genetic analysis indicated that M08, the synthetic hexaploid wheat derived from hybridization between Triticum durum （2n = 6X = 28; genome AABB） and Aegilops tauschii （2n = 2X = 14; genome DD）, showed resistance to current prevailing yellow rust races at seedling stage, which was controlled by a single dominant gene, designated as YrAm. Bulked segregant analysis was used to identify microsatellite markers linked to gene YrAm in an F2 population derived from cross M08 （resistant） × Jinan 17 （susceptible）. Three microsatellite marker loci Xgwm77, Xgwm285, and Xgwml31 located on chromosome 3B were mapped to the YrAm locus. Xgwml31 was the closest marker locus and showed a linkage distance of 7.8 cM to the resistance locus. Thus, it is assumed that YrAm for resistance to yellow rust may be derived from Triticum durum and is located on the long arm of chromosome 3B. 相似文献
18.
小麦条锈菌生理小种国际鉴别寄主Spaldings Prolific中抗条锈病基因YrSpP的微卫星标记 总被引：1，自引：2，他引：1
Spaldings Prolific是国际小麦条锈菌鉴别寄主和国内外重要抗源。以含有小麦抗条锈病基因YrSpP的近等基因系Taichung29*6/YrSpP及其轮回亲本Taichung29为材料， 用目的基因所在2B染色体上88对微卫星引物对其基因组DNA进行PCR扩增和电泳分析，发现用WMC441引物在近等基因系与轮回亲本间稳定扩增出特异性DNA片段。经F2代群体162个抗、感单株检测证实，该片段位点与抗条锈病基因YrSpP连锁，遗传距离为10.9 cM，确定WMC441为抗条锈病基因YrSpP的标记，并可用于该基因的检测和辅助选择。 相似文献
19.
染色体定位粗山羊草抗小麦白粉病基因PmAeY1 总被引：9，自引：0，他引：9
小麦白粉病是严重影响小麦生产的重要病害之一，利用抗病品种是防治该病最为经济、有效和环境安全的方法。目前已经标记31个小麦抗白粉病基因，但大多数抗性丧失或与不良性状紧密连锁。粗山羊草存在许多小麦抗病基因，它可以扩大小麦抗病基因的基础，提供新的抗小麦白粉病基因的来源。使用分离群体分组分析法（BAS），将抗小麦白粉病E11菌株的粗山羊草材料Y219与感病材料Y169杂交，F1代表现抗病，F2代出现抗感3：1分离，用SSR标记技术，抗病新基因PmAeY1定位在2D染色体上，与Xgwm484、Wmc453、Xgwrrd15和Xgwm157的遗传距离分别是30．4、23．4、6．1和5．5cM。 相似文献
20.
80份国外春小麦种质资源抗条锈性评价 总被引：4，自引：3，他引：1
【目的】小麦条锈病是由小麦条锈菌（Puccinia striiformis f. sp. tritici,Pst）引起的世界范围内小麦重要病害之一,培育和种植抗病品种是控制该病害的最有效策略。评价80份国外春小麦种质资源对中国当前小麦条锈菌流行小种的抗条锈性,为中国小麦抗条锈病育种提供依据和抗源。【方法】应用中国流行小麦条锈菌生理小种CYR29、CYR31、CYR32、CYR33以及致病类型PST-HY8和PST-V26对80份国外小麦种质资源进行苗期温室抗病性鉴定,以铭贤169和AvS为感病对照品种;并于2013年和2014年分别在陕西省杨凌和甘肃省天水进行田间成株期抗病性鉴定。根据苗期和田间成株期的抗病性鉴定结果对其进行抗病类型分类和评价。【结果】80份小麦种质资源的抗病类型可分为3类。第1类为全生育期抗病类型,有8份。其中PI660067、PI660119和PI660122在苗期和田间成株期均表现较高水平的抗病性。其余5个品系PI660056、PI607839、PI591045、TA5602和PI660064在苗期则对个别小种表现感病,并且在不同年份和不同测试地点成株期也表现感病。第2类为成株抗病类型,有28份。其苗期对所有测试小种均表现感病,有23份在田间成株期均表现抗病。但PI660075、PI660083、PI660085、PI660097和PI660107在不同年份和不同测试地点成株期表现感病。第3类为兼具成株期和对部分中国小种失去抗性的全生育期抗病类型,有44份,其苗期至少对一个测试小种表现抗病。有37份在田间成株期均表现抗病。但PI660065、PI660076、PI660079、PI660080、PI660095、PI660096和PI610750在不同年份和不同测试地点成株期表现感病。【结论】80份国外小麦种质资源中大部分对中国小麦条锈菌流行小种表现优良的抗病性。这些种质资源可作为抗源在今后抗病育种中加以利用,将丰富中国小麦抗条锈病基因的多样性。可能由于不同年份田间流行小种不同,造成一些成株抗病品系在不同年份和不同测试地点表现感病,由此推测成株抗病性可能也具有小种专化性。 相似文献