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United States Department of Agriculture

Agricultural Research Service

Title: Cooking quality and blast disease resistance linked markers: Genotyping a working rice germplasm collection for future marker-assisted breeding applications

Authors
item Boyett, Virginia - UNIV. OF AR RREC
item Agrama, H - UNIV. OF AR RREC
item Gibbons, James - UNIV. OF AR RREC
item Bryant, Rolfe
item Eizenga, Georgia
item Moldenhauer, Karen A - UNIV. OF AR RREC

Submitted to: Plant and Animal Genome Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: November 1, 2006
Publication Date: January 12, 2007
Citation: Boyett, V., Agrama, H., Gibbons, J., Bryant, R.J., Eizenga, G.C., Moldenhauer, K.K. 2007. Cooking quality and blast disease resistance linked markers: Genotyping a working rice germplasm collection for future marker-assisted breeding applications [abstract]. Plant and Animal Genome XV. p. 150. Available: http://www.intl-pag.org/15/abstracts/PAG15_P03f_197.html.

Technical Abstract: Marker-assisted breeding is being used in US rice breeding programs to enhance development of rice cultivars with improved cooking quality and genetic resistance to rice blast disease. Because there is a continuous threat of race shifts within the Magnaporthe grisea populations found in Southern US rice fields, which can lead to a breakdown in host plant resistance, it is important to identify, introgress, and pyramid additional sources of resistance into new cultivars. Frequently though, highly disease resistant cultivars possess undesirable cooking traits for US market classes. Using molecular marker technology to select those cultivars with both improved blast disease resistance and good cooking quality can accelerate the breeding process by increasing selection efficiency, as it can be performed without regard to environmental influences or confounding phenotypic traits. Genotyping the germplasm collection gives the breeders additional information regarding the genetic background and diversity of the parental material. The data also assists in variety verification and assessment of seed purity. When compared with phenotypic data, associations between phenotype and genotype can be confirmed. Genotyping data and association confirmation will help determine not only which current cross populations would benefit from marker analysis, but also which breeding lines will be used as parents of future crosses and the manner in which they will be used.

Last Modified: 12/20/2014
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