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United States Department of Agriculture

Agricultural Research Service

Research Project: RESPONSE OF DIVERSE RICE GERMPLASM TO BIOTIC AND ABIOTIC STRESSES

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Title: An update of genetic studies of disease resistance genes and their utilizations for rice protection)

Author
item Jia, Yulin
item Costanzo, Stefano
item Lee, Seonghee
item Dai, Yuntao
item Correll, James
item Roy-chodhury, Moytri
item Cartwright, Richard
item Lee, Fleet

Submitted to: Rice Technical Working Group Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 1/15/2010
Publication Date: 2/22/2010
Citation: Jia, Y., Costanzo, S., Lee, S., Dai, Y., Correll, J., Roy-Chodhury, M., Cartwright, R., Lee, F. 2010. An update of genetic studies of disease resistance genes and their utilizations for rice protection. In: Proceedings of the Rice Technical Working Group Meeting, Feb. 22-24, 2010, Biloxi, MS. CDROM

Interpretive Summary:

Technical Abstract: The use of resistance (R) genes is one of the most economical and environmentally sound methods of crop protection. Most recently, through molecular analysis of a pathogenic factor AVR-Pita in field blast isolates from the southern U.S., we demonstrated that the blast fungus is capable of overcoming resistance provided by a single R gene through various genetic mechanisms. These findings suggest that effective resistance to blast cannot be achieved by a single R gene. In the southern U.S., rice germplasm containing blast R genes, Pi-ta, Pi-b, Pi-k(m/h/s), Pi42(t), Pi43(t), Pi-z(t) conferring overlapped resistance to all common U.S. races of blast fungus were introduced and used as resistant gene donors. DNA markers closely linked to these blast R genes and user friendly markers, “the perfect DNA markers,” derived from portions of three blast R genes, Pi-ta, Pi-b, Pi-km, have been developed. These markers can be effectively used for developing cultivars with improved blast resistance through marker assisted selection (MAS).

Last Modified: 8/24/2016
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