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ARS Home » Pacific West Area » Pullman, Washington » WHGQ » Research » Publications at this Location » Publication #317346
Title: Identification of QTL for adult plant resistance to stripe rust in Chinese wheat landrace Caoxuan 5

Author
item ZHOU, X - Northwest Agriculture And Forestry University
item ZHANG, Y - Northwest Agriculture And Forestry University
item ZENG, Q - Northwest Agriculture And Forestry University
item Chen, Xianming
item HAN, D - Northwest Agriculture And Forestry University
item HUANG, L - Northwest Agriculture And Forestry University
item KANG, Z - Northwest Agriculture And Forestry University

Submitted to: Euphytica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/27/2014
Publication Date: 1/2/2015
Citation: Zhou, X.L., Zhang, Y., Zeng, Q.D., Chen, X., Han, D.J., Huang, L.L., Kang, Z.S. 2015. Identification of QTL for adult plant resistance to stripe rust in Chinese wheat landrace Caoxuan 5. Euphytica. 204:1349. doi: 10.1007/s10681-014-1349-0.

Interpretive Summary: Stripe rust is an important wheat disease worldwide. The development of wheat cultivars with adult plant resistance has been given increasing emphasis in recent years because of the reputed durability of adult plant resistance compared to all-stage resistance. Wheat landrace Caoxuan 5 showed a high level of adult plant resistance in field nurseries from 2008 to 2014. Bulked segregant analysis using resistance gene analog polymorphism, simple sequence repeat and sequence-tagged site markers identified molecular markers linked to resistance genes. A total of 176 progeny lines were evaluated for stripe rust response in field nurseries at two sites for two years. Broad sense heritability of adult plant resistance in the population was estimated as 0.81. Two quantitative trait loci were identified to confer adult plant resistance. Based on molecular markers, both loci appear to be different from previously identified stripe rust resistance genes. These resistance loci and their molecular markers identified in Caoxuan 5 should be useful in breeding for stripe rust resistance.

Technical Abstract: Yellow (or stripe) rust, caused by Puccinia striiformis f. sp. tritici (Pst), is an important wheat disease worldwide. The development of wheat cultivars with adult plant resistance (APR) has been given increasing emphasis in recent years because of the reputed durability of APR compared to all-stage resistance. Wheat landrace Caoxuan 5 showed a high level of APR in field nurseries from 2008 to 2014. Bulked segregant analysis using resistance gene analog polymorphism, simple sequence repeat and sequence-tagged site markers identified molecular markers linked to resistance genes. A total of 176 F3 lines were evaluated for stripe rust response in field nurseries at two sites for 2 years. Broad sense heritability of APR in the population was estimated as 0.81. Inclusive composite interval mapping identified quantitative trait loci (QTL) QYrcx.nafu-3BS and QYrcx.nafu-6AL conferring adult plant resistance and they explained 17.3–38.1 %and 9.7–19.8 % of the phenotypic variations, respectively. Based on molecular markers, both QTL appear to be different from previously identified stripe rust resistance genes. The resistance QTL and their molecular markers identified in Caoxuan 5 should be useful in breeding for stripe rust resistance.