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GRAIN LENGTH AND AWN 1 negatively regulates grain size in rice
Author(s) -
Wang Tao,
Zou Ting,
He Zhiyuan,
Yuan Guoqiang,
Luo Tao,
Zhu Jun,
Liang Yueyang,
Deng Qiming,
Wang Shiquan,
Zheng Aiping,
Liu Huainian,
Wang Lingxia,
Li Ping,
Li Shuangcheng
Publication year - 2019
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12736
Subject(s) - mutant , grain size , dephosphorylation , biology , gene , phosphatase , grain yield , phosphorylation , agronomy , genetics , materials science , metallurgy
Summary Grain size is an important factor determining yield in rice. Here, we identified a recessive mutant gene, grain length and awn 1 ( gla1 ), which caused a significant increase in grain length and weight, and was associated with long awns. The gla1 mutation was mapped to a single‐nucleotide polymorphism in a gene encoding a cytoplasmically‐localized mitogen‐activated protein kinase (MAPK) phosphatase. Overexpression of GLA1 caused a decrease in grain length, and the GLA1 protein interacted with OsMAPK6. These results suggest that GLA1 may serve as a negative regulator of the OsMAPKK4‐OsMAPK6 cascade, controlling grain size via the dephosphorylation of OsMAPK6.