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Rare allele of a previously unidentified histone H4 acetyltransferase enhances grain weight, yield, and plant biomass in rice

2014; National Academy of Sciences; Volume: 112; Issue: 1 Linguagem: Inglês

10.1073/pnas.1421127112

1091-6490

Xian Jun Song, Takeshi Kuroha, Madoka Ayano, Tomoyuki Furuta, Keisuke Nagai, Norio Komeda, Shuhei Segami, Kotaro Miura, Daisuke Ogawa, Takumi Kamura, Takamasa Suzuki, Tetsuya Higashiyama, Masanori Yamasaki, Hitoshi Mori, Yoshiaki Inukai, Jian Wu, Hidemi Kitano, Hitoshi Sakakibara, Steven E. Jacobsen, Motoyuki Ashikari,

Rice Cultivation and Yield Improvement

Significance Grain weight is an important crop yield component; however, its underlying regulatory mechanisms are largely unknown. Here, we identify a grain-weight quantitative trait locus (QTL) in rice encoding a new-type GNAT-like protein that harbors intrinsic histone acetyltransferase activity (OsglHAT1). Elevated OsglHAT1 expression enhances grain weight and yield by enlarging spikelet hulls via increasing cell number and accelerating grain filling, and increases global acetylation levels of histone H4. Our findings reveal the first example, to our knowledge, of a QTL for a yield component trait being due to a chromatin modifier that has the potential to improve crop high-yield breeding.