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ARS Home » Southeast Area » Stuttgart, Arkansas » Dale Bumpers National Rice Research Center » Research » Publications at this Location » Publication #383909
Research Project: Gene Discovery and Crop Design for Current and New Rice Management Practices and Market Opportunities

Location: Dale Bumpers National Rice Research Center

Title: Mapping rice genes involved in blast resistance, chalkiness and yield related component

Author
item Jia, Yulin
item Dunlap, Heather
item Jia, Melissa
item SITES, ALAN - University Of Arkansas
item HERRING, NICK - University Of Arkansas
item ZONGBU, YAN - Texas A&M Agrilife

Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/1/2021
Publication Date: 8/4/2021
Citation: Jia, Y., Box, H.N., Jia, M.H., Sites, A., Herring, N., Zongbu, Y. 2021. Mapping rice genes involved in blast resistance, chalkiness and yield related component. Abstract. American Phytopathological Society Virtual Meeting, August 2-6, 2021.

Interpretive Summary:

Technical Abstract: Plant genes for disease resistance, quality and productivity are often co-located within small genomic intervals and the same molecules and resources of plants are often simultaneously allocated for disease resistance, quality, and productivity. ‘Minghui 63’ is a late maturing long grain indica cultivar resistant to rice blast disease, has good yield potential, and is one of the most widely used fertility restorers in hybrid rice production. ‘M-202’ is an early maturing, semi dwarf medium grain temperate japonica cultivar susceptible to rice blast disease and is one the parents for many rice cultivars with premium quality. Genomic regions in Minghui 63 and M-202 involved in reactions to the US blast races, chalkiness, and yield components are unclear. In this study, we evaluated Minghui 63 and M-202 with 12 commonly found US blast races, IA45, IB1, IB45, IB49, IB54, IC1, IC17, ID1, IE1, IE1k, IG1 and IH1 under greenhouse conditions, percent chalk, number of days to heading, tiller angle, plant height, panicle length, number of primary branch /panicle, panicle weight, grain length, and thousand grain weight of plants grown under field conditions A recombinant inbred line population consisting of 275 individuals was developed using progenies derived from the cross of Minghui 63 with ‘M-202’ under greenhouse conditions. This Minghui 63/M-202 population was genotyped with 156 polymorphic simple sequence repeat (SSR) markers distributed among 12 chromosomes. A linkage map with 1022.84 cM was constructed using the Inclusive Composite Interval Mapping (ICIM) software and the entire population was evaluated for the above-mentioned traits and underlying genomic regions in both ‘Minghui 63’ and ‘M-202’. The possibility of trade-offs among blast resistance, quality and productivity and its implication for rice breeding will be presented.