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Title of Journal: Mol Breeding

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Abbravation: Molecular Breeding

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Springer Netherlands

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ISSN

1572-9788

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Loss of function of Emphasis Type="Italic"OsMADS

Authors: Yu Zhang Haiping Yu Jin Liu Wei Wang Jian Sun Qi Gao Yanhong Zhang Dianrong Ma Jiayu Wang Zhengjin Xu Wenfu Chen
Publish Date: 2016/11/04
Volume: 36, Issue: 11, Pages: 147-
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Abstract

Rice Oryza sativa L is one of the most important food crops especially in Asia The spikelet is a characteristic structure of grass inflorescences that determines crop output However the molecular mechanism that controls spikelet development and grain yield in rice remains unclear In this study we isolated a new osmads34 allelic mutant ie osmads34t The osmads34t mutant showed more primary branch numbers short panicles and long sterile lemmas The sterile lemmas were transformed into the lemmas and had the lemma identity in the osmads34t mutant suggesting that the sterile lemma and lemma are homologous organs Additionally osmads34t displayed smaller grains on its secondary branches of panicles and a lower seedsetting rate These results suggest that OsMADS34 plays an important role in determination of grain size and yield in rice OsMADS34 was expressed in tested organs and tissues and its green fluorescent protein GFP signal was located in the nucleus The result of this study will be used to understand the identity of unique organs in grass spikelets and may improve grain yield in breeding practice

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