Journal
BREEDING SCIENCE
Volume 65, Issue 5, Pages 403-410Publisher
JAPANESE SOC BREEDING
DOI: 10.1270/jsbbs.65.403
Keywords
genome-wide association mapping; local population; Oryza sativa L.; plant breeding programs; rice
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Funding
- Ministry of Agriculture, Forestry and Fisheries of Japan (Science and Technology Research Promotion Program for Agriculture, Forestry, Fisheries and Food Industry)
- JSPS KAKENHI Grant [25450015]
- Grants-in-Aid for Scientific Research [25450015] Funding Source: KAKEN
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Plant breeding programs in local regions may generate genetic variations that are desirable to local populations and shape adaptability during the establishment of local populations. To elucidate genetic bases for this process, we proposed a new approach for identifying the genetic bases for the traits improved during rice breeding programs; association mapping focusing on a local population. In the present study, we performed association mapping focusing on a local rice population, consisting of 63 varieties, in Hokkaido, the northern-most region of Japan and one of the northern limits of rice cultivation worldwide. Six and seventeen QTLs were identified for heading date and low temperature germinability, respectively. Of these, 13 were novel QTLs in this population and 10 corresponded to the QTLs previously reported based on QTL mapping. The identification of QTLs for traits in local populations including elite varieties may lead to a better understanding of the genetic bases of elite traits. This is of direct relevance for plant breeding programs in local regions.
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