关键词:小麦; 孢囊线虫; 白粉病; 抗病性 Development and Identification of Wheat Lines H3714 and H4058 Resistant to Cereal Cyst Nematode SUN Xi-Ying1,2, CUI Lei2,3, SUN Lei2, SUN Yan-Ling2, QIU Dan1,2, ZOU Jing-Wei1,2, WU Xiao-Fei2, WANG Xiao-Ming2, LI Hong-Jie2,* 1 College of Life Science and Technology, Hebei Normal University of Science and Technology, Qinhuangdao 066004, China
2 National Key Facility for Crop Gene Resources and Genetic Improvement / Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China
3 Institute of Crop Science, Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China
AbstractCereal cyst nematode (CCN, Heteroderaspp.) has occurred in major wheat ( Triticum aestivum L.) producing regions in China. Developing wheat cultivars resistant to CCN is limited due to the shortage of effective sources of resistance. Madsen, a winter wheat cultivar released in the Pacific Northwest Region of the USA, is highly resistant to CCN populations from China. However, it is difficult to use this cultivar in breeding programs because of its late heading and maturity. In the present study, Chinese winter wheat cultivars Yannong 21 and Jimai 19 were crossed and backcrossed to Madsen, and lines H3714 and H4058 were developed from BC1F4 progenies. Tests under both natural infestation and artificial inoculation conditions indicated that resistance of H3714 and H4058 to the H. avenae Xingyang population (pathotype Ha43) and the H. filipjevi Xuchang population (pathotype Hfc-1) from Henan province was superior to that of Yannong 21 and Jimai 19. Results of the field test inoculated with a mixture of Bgt isolates demonstrated that both lines showed adult plant resistance to powdery mildew, and line H4058 was also resistant to different Bgt isolates at the seedling stage. The heading date of these lines was comparable to that of Yannong 21 and Jimai 19, and obviously earlier than that of Madsen. The fragments of chromosome 2NS from Aegilops ventricosa were detected in lines H3714 and H4058 using a pair of chromosome-specific primers VENTRIUP-LN2 and the molecular markers Vlr2.6-3′-Vlr2.4-5′ and VRGA-F11-VRGA-R5 that were specific for Vrga1D gene from Ae. ventricosa. Results of Illumina iSelect 90K SNP assay showed that the two lines differed in their chromosome constitutions. Two thirds of the polymorphic SNPs were identical and the remaining ones were different among 4918 polymorphic SNPs between the two sib lines. The newly developed wheat lines H3714 and H4058 can be used as sources of resistance in developing CCN-resistant wheat cultivars.
Keyword: Triticum aestivum; Cereal cyst nematode; Powdery mildew; Resistance Show Figures Show Figures
图1 田间病圃和接种条件下H3714和H4058及其亲本Madsen、烟农21和济麦19的单株孢囊数Fig. 1 Mean number of white females per plant developed on the roots of H3714, H4058 and their parental cultivars Madsen, Yannong 21, and Jimai 19 under natural infestation in the field tests and in the artificial inoculation test
表1 H3714、H4058和Madsen苗期和成株期对白粉病的反应 Table 1 Reactions of H3714, H4058, and Madsen to Blumeria graminis f. sp. tritici (Bgt) isolates at the seedling and adult plant stages
品系/品种 Line/cultivar
苗期接种Bgt菌株 Bgt isolates inoculated at the seedling stage
成株期 Adult plant stage
E09
E11
E20
E21
反应型 Infection type
最大病害严重度 Maximum disease severity
H3714
3
3
3
3
4
0
H4058
1
0
1
0
0
0
Madsen
3
3
4
3
7
85
中作9504 Zhongzuo 9504
4
4
4
4
8
100
表1 H3714、H4058和Madsen苗期和成株期对白粉病的反应 Table 1 Reactions of H3714, H4058, and Madsen to Blumeria graminis f. sp. tritici (Bgt) isolates at the seedling and adult plant stages
图2 利用偏凸山羊草2NS染色体特异引物VENTRIUP-LN2 (A)、Vlr2.6-3′ -Vlr2.4-5′ (B)和VRGA-F11-VRGA-R5 (C)对H3714和H4058及其亲本和对照材料的扩增M: 100 bp DNA ladder; 1: 偏凸山羊草; 2: VPM1; 3: Madsen; 4: H3714; 5: H4058; 6: 烟农21; 7: 济麦19; 8: 温麦19。 箭头示各标记扩增的特征带。Fig. 2 Amplification of H3714 and H4058 as well as their parental cultivars and the controls using primers Vlr2.6-3′ - Vlr2.4-5′ (A), VENTRIUP-LN2 (B), and VRGA-F11-VRGA-R5 (C) specific to chromosome 2NS from Aegilops ventricosaM: 100 bp DNA ladder; 1: Aegilops ventricosa; 2: VPM1; 3: Madsen; 4: H3714; 5: H4058; 6: Yannong 21; 7: Jimai 19; 8: Wenmai 19. Arrows indicate the diagnostic bands amplified by each pair of primers.
图3 多态性SNP位点在H3714和H4058部分同源群(A)和基因组(B)上的分布Fig. 3 Distributions of polymorphic SNPs on different homoeologous groups (A) and genomes (B) in lines H3714 and H4058
图4 根据多态性SNP绘制的H3714和H4058的染色体构成图相同编号并列的2条染色体, 左侧为H3714, 右侧为H4058; 染色体编号下的数字为SNP数。Fig. 4 A diagram of chromosomal compositions for H3714 and H4058 based on the polymorphic SNPsThe two chromosomes under the same codes belong to H3714 (left) and H4058 (right). The number of SNPs used to construct the genetic maps of individual chromosomes is indicated under the chromosome codes.
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