Identification of the resistance gene to powdery mildew in Chinese wheat landrace Baiyouyantiao
XU Xiao-dan1, 2, FENG Jing1, FAN Jie-ru1, LIU Zhi-yong3, LI Qiang4, ZHOU Yi-lin1, MA Zhan-hong2
1 State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China 2 College of Plant Protection, China Agricultural University, Beijing 100193, P.R.China 3 State Key Laboratory of Plant Cell and Chromosome Engineering/Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, P.R.China 4 College of Plant Protection, Northwest A&F University/State Key Laboratory of Crop Stress Biology for Arid Areas, Yangling 712100, P.R.China
Abstract Powdery mildew, caused by Blumeria graminis f. sp. tritici (Bgt), is one of the most damaging diseases to wheat in the world. The cultivation of resistant varieties of wheat is essential for controlling the powdery mildew epidemic. Wheat landraces are important resources of resistance to many diseases. Mapping powdery mildew resistance genes from wheat landraces will promote the development of new varieties with disease resistance. The Chinese wheat landrace Baiyouyantiao possesses characteristic of disease resistance to powdery mildew. To identify the resistance gene in this landrace, Baiyouyantiao was crossed with the susceptible cultivar Jingshuang 16 and seedlings of parents and F1, BC1, F2, and F2:3 were tested with Bgt isolate E09. The genetic results showed that the resistance of Baiyouyantiao to E09 was controlled by a single recessive gene, tentatively designated PmBYYT. An Illumina wheat 90K single-nucleotide polymorphism (SNP) array was applied to screen polymorphisms between F2-resistant and F2-susceptible DNA bulks for identifying the chromosomal location of PmBYYT. A high percentage of polymorphic SNPs between the resistant and susceptible DNA bulks was found on chromosome 7B, indicating that PmBYYT may be located on this chromosome. A genetic linkage map of PmBYYT consisting of two simple sequence repeat markers and eight SNP markers was developed. The two flanking markers were SNP markers W7BL-8 and W7BL-15, with genetic distances of 3 and 2.9 cM, respectively. The results of this study demonstrated the rapid characterization of a wheat disease resistance gene and SNP marker development using the 90K SNP assay. The flanking markers of gene PmBYYT will benefit marker-assisted selection (MAS) and map-based cloning in breeding wheat cultivars with powdery mildew resistance.
The study was funded by the National Key Research and Development Program of China (2017YFD0201701), the Special Fund for Agro-scientific Research in the Public Interest, China (201303016) and the Science and Technology Project for Xingjiang Uygur Autonomous Region, China (2013911092).
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Cite this article:
XU Xiao-dan, FENG Jing, FAN Jie-ru, LIU Zhi-yong, LI Qiang, ZHOU Yi-lin, MA Zhan-hong. Identification of the resistance gene to powdery mildew in Chinese wheat landrace Baiyouyantiao[J]. Journal of Integrative Agriculture,
2018, 17(01): 37-45.
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