Chinese Bulletin of Botany ›› 2014, Vol. 49 ›› Issue (1): 1-7.DOI: 10.3724/SP.J.1259.2014.00001

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Phenotype Analyses and Gene Mapping of abnormal palea and lodicules, a Rice Mutant with Abnormal Floral Organs

Huanhuan Wang, Qiang Cai, Mingjiao Chen, Zhijing Luo, Dabing Zhang, Zheng Yuan*   

  1. School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2013-08-06 Revised:2013-09-01 Online:2014-01-01 Published:2014-01-01
  • Contact: Zheng Yuan

Abstract: Rice is an important food crop, and the initiation and morphogenesis of flower organs directly affects the grain yield. To uncover the mechanism controlling rice flower development, we isolated the mutant abnormal palea and lodicules (apl) showing abnormal flower organs. Compared to the wild-type flower, the apl flower showed defective development, including enlarged palea, transition of lodicule into elongated or glume-like structures, and decreased number of stamens, which suggests that APL plays a key role in specifying flower organ identity, including palea, lodicule and stamen. Genetic analysis indicated that apl was caused by a single recessive locus, and gene mapping analysis showed that APL was localized on chromosome 1. This study provides a basis for future functional analysis of APL in rice flower organ morphogenesis.