Seed germination is a complex trait regulated by multiple genes in rice. However, the regulators of rice seed germination have yet to be sufficiently determined. Here, a quantitative trait locus (QTL) for rice seed germination was identified in a genome-wide association study. The candidate gene JASMONATE ZIM-DOMAIN 5 (OsJAZ5) of the QTL was verified that positively regulates seed germination. OsJAZ5 regulation of seed germination involves an OsABI3-mediated abscisic acid pathway. Overexpression of OsJAZ5 facilitated seed germination. The application of OsJAZ5 might be useful for increasing seed germination for rice direct seeding.
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Sun et al. (2024) studied this question.
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