Person: Xia, Xianchun
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Xia
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Xianchun
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Xianchun Xia
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0000-0003-2071-197X 18 results
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- SNP markers for low molecular glutenin subunits (LMW-GSs) at the Glu-A3 and Glu-B3 loci in bread wheat(Public Library of Science, 2020) Dreisigacker, S.; Yonggui Xiao; Sehgal, D.; Guzman, C.; He Zhonghu; Xianchun Xia; Peña-Bautista, R.J.
Publication - Effective resistance to wheat stripe rust in a region with high disease pressure(American Phytopathological Society (APS), 2014) Bin Bai; Jiuyuan Du; Lu, Q.L.; He, C.Y.; Zhang, L.J.; Zhou, G.; Xianchun Xia; He Zhonghu; Wang, C.S.Stripe rust is a major fungal disease of wheat. It frequently becomes epidemic in southeastern Gansu province, a stripe rust hot spot in China. Evaluations of wheat germplasm response are crucial for developing cultivars to control the disease. In total, 57 wheat cultivars and lines from Europe and other countries, comprising 36 cultivars with documented stripe rust resistance genes and 21 with unknown genes, were tested annually with multiple races of Puccinia striiformis f. sp. tritici in the field at Tianshui in Gansu province from 1993 to 2013. Seven wheat lines were highly resistant, with infection type (IT) 0 during the entire period; 16 were moderately resistant (IT 0;-2); and 26 were moderately susceptible (IT 0;-4), with low maximum disease severity compared with the susceptible control Huixianhong. ‘Strampelli’ and ‘Libellula’, with three and five quantitative trait loci, respectively, for stripe rust resistance have displayed durable resistance in this region for four decades. Ten cultivars, including ‘Lantian 15’, ‘Lantian 26’, and ‘Lantian 31’, with stripe rust resistance derived from European lines, were developed in our breeding program and have made a significant impact on controlling stripe rust in southeastern Gansu. Breeding resistant cultivars with multiple adult-plant resistance genes seems to be a promising strategy in wheat breeding for managing stripe rust in this region and other hot spots.
Publication - Identification of QTL for adult-plant resistance to powdery mildew in Chinese wheat landrace Pingyuan 50(Crop Science Society of China, 2014) Muhammad Azeem Asad; Bin Bai; Lan, C.; Yan, J.; Xianchun Xia; He ZhonghuPowdery mildew caused by Blumeria graminis f. sp. tritici is one of the major wheat diseases worldwide. The Chinese wheat landrace Pingyuan 50 has shown adult-plant resistance (APR) to powdery mildew in the field for over 60 years. To dissect the genetic basis of APR to powdery mildew in this cultivar, a mapping population of 137 double haploid (DH) lines derived from Pingyuan 50/Mingxian 169 was evaluated in replicated field trials for two years in Beijing (2009–2010 and 2010–2011) and one year in Anyang (2009–2010). A total of 540 polymorphic SSR markers were genotyped on the entire population for construction of a linkage map and QTLanalysis. Three QTL were mapped on chromosomes 2BS (QPm.caas-2BS.2), 3BS (QPm.caas-3BS), and 5AL (QPm.caas-5AL) with the resistance alleles contributed by Pingyuan 50 explaining 5.3%, 10.2%, and 9.1% of the phenotypic variances, respectively, and one QTL on chromosome 3BL (QPm.caas-3BL) derived from Mingxian 169 accounting for 18.1% of the phenotypic variance. QPm.caas-3BS, QPm.caas-3BL, and QPm.caas-5AL appear to be new powdery mildew APR loci. QPm.caas-2BS.2 and QPm.caas-5AL are possibly pleiotropic or closely linked resistance loci to stripe rust resistance QTL. Pingyuan 50 could be a potential genetic resource to facilitate breeding for improved APR to both powdery mildew and stripe rust.
Publication - QTL mapping of adult-plant resistance to leaf rust in the wheat cross Zhou 8425B/Chinese spring using high-density SNP markers(Frontiers, 2017) Peipei Zhang; Guihong Yin; Aiyong Qi; Fengmei Gao; Xianchun Xia; He Zhonghu; Zaifeng Li; Daqun LiuWheat leaf rust is an important disease worldwide. Growing resistant cultivars is an effective means to control the disease. In the present study, 244 recombinant inbred lines from Zhou 8425B/Chinese Spring cross were phenotyped for leaf rust severities during the 2011-2012, 2012-2013, 2013-2014, and 2014-2015 cropping seasons at Baoding, Hebei province, and 2012-2013 and 2013-2014 cropping seasons in Zhoukou, Henan province. The population was genotyped using the high-density Illumina iSelect 90K SNP assay and SSR markers. Inclusive composite interval mapping identified eight QTL, designated as QLr.hebau-2AL, QLr.hebau-2BS, QLr.hebau-3A, QLr.hebau-3BS, QLr.hebau-4AL, QLr.hebau-4B, QLr.hebau-5BL, and QLr.hebau-7DS, respectively. QLr.hebau-2BS, QLr.hebau-3A, QLr.hebau-3BS, and QLr.hebau-5BL were derived from Zhou 8425B, whereas the other four were from Chinese Spring. Three stable QTL on chromosomes 2BS, 4B and 7DS explained 7.5-10.6%, 5.5-24.4%, and 11.2-20.9% of the phenotypic variance, respectively. QLr.hebau-2BS in Zhou 8425B might be the same as LrZH22 in Zhoumai 22; QLr.hebau-4B might be the residual resistance of Lr12, and QLr.hebau-7DS is Lr34. QLr.hebau-2AL, QLr.hebau-3BS, QLr.hebau-4AL, and QLr.hebau-5BL are likely to be novel QTL for leaf rust. These QTL and their closely linked SNP and SSR markers can be used for fine mapping, candidate gene discovery, and marker-assisted selection in wheat breeding.
Publication - QTL mapping of adult-plant resistance to stripe rust in Chinese wheat cultivar Chuanyu 16(Canadian Center of Science and Education, 2012) Ling Wu; Zheng Youliang; Xianchun Xia; Peng Yunliang; Zhu Huazhong; Liu Yongjian; Wu Yu; Shizhao Li; He ZhonghuStripe rust, caused by Puccinia striiformis f. sp. tritici, is a serious wheat fungal disease, causing significant annual yield losses worldwide. The Chinese wheat cultivar Chuanyu 16 has shown good adult-plant resistance (APR) to stripe rust in Sichuan province, a hotspot for stripe rust epidemics. Chuanyu 16 was crossed with Chuanyu 12 and Chuanmai 32. Two populations, each with 140 recombinant inbred lines (RILs), were developed by single-seed descent, and used for quantitative trait locus (QTL) mapping. Field trials were conducted in Chengdu and Yaan from 2005 to 2008, providing stripe rust reaction data for six environments. Seven hundred and thirty one simple sequence repeat (SSR) markers were screened for association with stripe rust reaction, initially through bulked segregant analysis (BSA). Three QTLs for stripe rust resistance derived from Chuanyu 16 were detected in the first cross. They were detected by inclusive composite interval mapping (ICIM) and designated QYr.caas-1BL.1, QYr.caas-1BL.2 and QYr.caas-2AS. They explained 6.0 - 12.8%, 4.5 - 5.8% and 14.9 - 43.0%, respectively, of the phenotypic variance across environments. One digenic epistatic QTL between QYr.caas-1BL.2 and QYr.caas-2AS explained 4.3 - 10.4% of the phenotypic variance. QYr.caas-2AS was also detected in Chuanmai 32/Chuanyu 16, explaining 27.9 - 57.2% of the phenotypic variance across six environments. This QTL showed a major effect against stripe rust in Chuanyu 16, and was located in a similar position to Yr17. Specific markers indicated the presence of a segment from chromosome 2N of Triticum ventricosum that carries Yr17. Despite the lack of evidence for Yr17 in Chuanyu 16 based on pedigree, and inconsistencies in stripe rust response relative to a near-isogenic reference stock with the gene, we concluded that QYr.caas-2AS is Yr17. QYr.caas-1BL.1 and QYr.caas-1BL.2 showed minor effects for APR against stripe rust. QYr.caas-1BL.1 is probably a new gene for APR to stripe rust
Publication - Contribution of CIMMYT wheat germplasm to genetic improvement of grain yield in spring wheat of Sichuan, Yunnan, Gansu, and Xinjiang provinces(Institute of Crop Sciences, 2011) Yong Zhang; Shizhao Li; Wu Zhen-lu; Yang Wen-Xiong; Yu Ya-xiong; Xianchun Xia; He ZhonghuInformation on advances in wheat (Triticum aestivum L.) productivity is essential for genetic improvement on yield potential. Four yield potential trials with totally 59 leading cultivars from Sichuan, Yunnan, Gansu, and Xinjiang, China were conducted using a randomized complete block design with three replications under controlled environments in two successive cropping seasons from 2007 to 2009. The experimental sites were located in Chengdu in Sichuan province, Lijiang in Yunnan province, Wuwei in Gansu province, and Changji in Xinjiang province. Molecular markers were used to detect the presence of dwarfing genes and 1B/1R translocation. The results indicated that the annual genetic gain in yield in Sichuan, Yunnan, Gansu, and Xinjiang was 0.73%, 0.34%, 0.58%, and 1.43%, respectively. There was no obvious trend of yield component improvement for yield increase in Sichuan province; while reduced spikes per square meter and increased kernels per spike were the main factor for yield increase in Yunnan province; increased kernels per spike were the main factor for yield increase in Gansu province; and increased kernel weight of main spike and harvest index were the main factor for yield increase in Xinjiang province, together with the contribution from reduced plant height and earlier maturity. It also indicated that the dwarfing genes Rht-B1b and Rht-D1b were all from CIMMYT lines, and the significant progresses of genetic gain in yield in the four provinces were mainly due to the direct and indirect use of CIMMYT germplasm. Stripe rust resistance was the main contribution of CIMMYT germplasm in Sichuan and Yunnan; while CIMMYT germplasm contributed to high yield potential with high kernel number per spike, short plant height, and wide adaptability in Xinjiang and Gansu.
Publication - Progress of wheat breeding in China and the future perspective(Institute of Crop Sciences, 2011) He Zhonghu; Xianchun Xia; Xinmin Chen; Zhuang Qiao-ShengDuring the last ten years, Chinese wheat breeding has mainly made progresses in three aspects, i.e., (1) two sets of cultivars with high yielding potential, improved quality, and multi-resistance to various diseases were developed and extended, (2) three elite parents, viz. Zhou 8425B, Lumai 14, and 6VS/6AL translocation line played a leading role in cultivar development; and (3) a significant progress has been achieved in breeding methodology and applied research. Main constrains on wheat breeding were also summarized. The development and utilization of molecular markers such as SSR marker and functional maker, was reviewed from breeding point of view, and the priority areas for the next five to ten years were proposed. It summarized the progress of wheat quality study which is closely associated with cultivar development, including laboratory evaluation methods and selection criteria for pan bread, cookie, Chinese noodles and steamed bread. China?s strategies for wheat breeding were analyzed in four areas: (1) a draft points on improving Chinese wheat yield potential; (2) utilization of durable resistance for cultivar development; (3) more efforts on water use efficiency, tolerance to high temperature and traits associated with broad adaptation due to the serious impact of climate change; and (4) increased investment in breeding and seed marketing from private sector.
Publication - Identification of genomic regions controlling adult-plant stripe rust resistance in Chinese Landrace Pingyuan 50 through bulked segregant analysis(American Phytopathological Society (APS), 2010) Lan, C.; Shanshan Liang; Xiangchun Zhou; Gang Zhou; Qinglin Lu; Xianchun Xia; He ZhonghuStripe rust, caused by Puccinia striiformis f. sp. tritici, is one of the most widespread and destructive wheat diseases worldwide. Growing resistant cultivars with adult-plant resistance (APR) is an effective approach for the control of the disease. In this study, 540 simple sequence repeat markers were screened to map quantitative trait loci (QTL) for APR to stripe rust in a doubled haploid (DH) population of 137 lines derived from the cross Pingyuan 50 × Mingxian 169. The DH lines were planted in randomized complete blocks with three replicates in Gansu and Sichuan provinces during the 2005?06, 2006?07, and 2007?08 cropping seasons, providing data for four environments. Artificial inoculations were carried out in Gansu and Sichuan with the prevalent Chinese race CYR32. Broad-sense heritability of resistance to stripe rust for maximum disease severity was 0.91, based on the mean value averaged across four environments. Inclusive composite interval mapping detected three QTL for APR to stripe rust on chromosomes 2BS, 5AL, and 6BS, designated QYr.caas-2BS, QYr.caas-5AL, and QYr.caas-6BS, respectively, separately explaining from 4.5 to 19.9% of the phenotypic variation. QYr.caas-5AL, different from QTL previously reported, was flanked by microsatellite markers Xwmc410 and Xbarc261, and accounted for 5.0 to 19.9% of phenotypic variance. Molecular markers closely linked to the QTL could be used in marker-assisted selection for APR to stripe rust in wheat breeding programs.
Publication - Wheat flour, pan bread, and steamed bread qualities of common wheat near-isogenic lines differing in puroindoline b alleles(Institute of Crop Sciences, 2010) Ma Dong-Yun; Zhang, Y.; Xianchun Xia; Morris, C.F.; He ZhonghuThe alleles at puroindoline b (Pinb) locus affect processing quality of wheat (Triticum aestivum L.) flour. The effects of Pinb alleles have been studies using varieties with different genetic backgrounds, which may interfere in the results. In this study, seven near-isogenic lines (NILs) derived from Alpowa/Pinb allele donor parent//7* Alpowa were used to compare their qualities of flour, pan bread, and steamed bread. The NILs were grown in two environments in Xinjiang, China in 2008. The Pina-D1b/Pinb-D1a genotype possessed significantly higher values in grain hardness, protein content and starch damage than other genotypes, whereas the Pina-D1a/Pinb-D1d genotype had a better milling quality. For mixograph parameters, the Pina-D1b/Pinb-D1a genotype showed the highest peak value, peak width, and 8 min curve height, and the lowest values went to the Pina-D1a/Pinb-D1d genotype. The Pina-D1a/Pinb-D1d genotype had the lowest right of peak slope. For steamed bread quality, higher texture score was observed in the genotype Pina-D1a/Pinb-D1g. Genotypes Pina-D1a/Pinb-D1c and Pina-D1a/Pinb-D1d appeared in the best stress relaxation score and total score, followed by Pina-D1a/Pinb-D1e and Pina-D1a/Pinb-D1g. Genotype Pina-D1a/Pinb-D1f had slightly superior total loaf score in comparison with other genotypes.
Publication - Seedling and slow rusting resistance to leaf rust in Chinese wheat cultivars(American Phytopathological Society (APS), 2010) Li, Z.F.; Xianchun Xia; He Zhonghu; Li, X.; Zhang, L.J.; Wang, H.Y.; Meng, Q.F.; Yang, W.X.; Li, G.Q.; Liu, D.Q.Identification of resistance genes is important for developing leaf rust resistant wheat (Triticum aestivum) cultivars. A total of 102 Chinese winter wheat cultivars and advanced lines were inoculated with 24 pathotypes of Puccinia triticina for postulation of leaf rust resistance genes effective at the seedling stage. These genotypes were also planted in the field for characterization of slow rusting responses to leaf rust in the 2006?07 and 2007?08 cropping seasons. Fourteen leaf rust resistance genes?Lr1, Lr2a, Lr3bg, Lr3ka, Lr14a, Lr16, Lr17a, Lr18, Lr20, Lr23, Lr24, Lr26, Lr34, and LrZH84?either singly or in combinations, were postulated in 65 genotypes, whereas known resistance genes were not identified in the other 37 accessions. Resistance gene Lr26 was present in 44 accessions. Genes Lr14a and Lr34 were each detected in seven entries. Lr1 and Lr3ka were each found in six cultivars, and five lines possessed Lr16. Lr17a and Lr18 were each identified in four lines. Three cultivars were postulated to possess Lr3bg. Genes Lr20, Lr24, and LrZH84 were each present in two cultivars. Each of the genes Lr2a and Lr23 may exist in one line. Fourteen genotypes showed slow leaf rusting resistance in two cropping seasons.
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