Molecular mechanism of hybrid rice has a major breakthrough
Since the 70s of last century, the hybrid rice in China has been promote large-scale. And hybrid rice played an irreplaceable role in the issue of food security in China. Although the heterosis in agricultural production was widely used, but its genetic basis and molecular mechanism is still poorly understood, this is a classic of scientific problems. Chinese researchers get a major breakthrough achieved about the advantages of hybrid rice, and the molecular mechanism of heterosis. They are Zhu Lihuang、Zhu Zhen and Yu jun form The Institute of Genetics and Developmental Biology (IGDB) of the Chinese Academy of Sciences (CAS), also Hunan Hybrid Rice Center Yuan Longping Academician. Related papers published in the Proc Natl Acad Sci USA.
For the important progress, life science journal Cell in their authority “Leading Edge” column in Vocational Studies paper and spoke the study clarify the heterosis in rice as a starting point for the molecular mechanism:
these findings provide a starting point for uncovering its mechanistic basis in one of the world’s most important food crops
Via: (http://www.pnas.org/content/106/19/7695)
A transcriptomic analysis of superhybrid rice LYP9 and its parents
Gang Weia, Yong Taoa,Guozhen Liuc, Chen Chenc, Renyuan Luob, Hongai Xiaa, Qiang Gana,b, Haipan Zengc, Zhike Luc, Yuning Hanc, Xiaobing Lia, Guisheng Songa, Hongli Zhaia, Yonggang Penga, Dayong Lia,Honglin Xua, Xiaoli Weia, Mengliang Caoe, Huafeng Denge, Yeyun Xine, Xiqin Fue Longping Yuane, Jun Yuc, Zhen Zhua and Lihuang Zhua
Abstract
By using a whole-genome oligonucleotide microarray, designed based on known and predicted indica rice genes, we investigated transcriptome profiles in developing leaves and panicles of superhybrid rice LYP9 and its parental cultivars 93-11 and PA64s. We detected 22,266 expressed genes out of 36,926 total genes set collectively from 7 tissues, including leaves at seedling and tillering stages, flag leaves at booting, heading, flowering, and filling stages, and panicles at filling stage. Clustering results showed that the F1 hybrid’s expression profiles resembled those of its parental lines more than that which lies between the 2 parental lines. Out of the total gene set, 7,078 genes are shared by all sampled tissues and 3,926 genes (10.6% of the total gene set) are differentially expressed genes (DG). As we divided DG into those between the parents (DGPP) and between the hybrid and its parents (DGHP), the comparative results showed that genes in the categories of energy metabolism and transport are enriched in DGHP rather than in DGPP. In addition, we correlated the concurrence of DG and yield-related quantitative trait loci, providing a potential group of heterosis-related genes.
中文简讯：水稻杂交优势分子机理研究取得重大突破
自上世纪70年代起，杂交水稻在我国的大面积推广，为解决中国粮食安全问题发挥了不可替代的作用。虽然杂交优势在农业生产上广泛应用，但其遗传基础和分子机理仍知之甚少，是一个经典的科学难题。植物基因研究中心朱立煌课题组和朱祯课题组与基因组所于军课题组、湖南杂交水稻中心袁隆平院士经过数年的研究，在水稻杂交优势的分子机理方面取得重大突破，相关论文发表在Proc Natl Acad Sci USA (http://www.pnas.org/content/106/19/7695）。对于这一重要进展，生命科学权威刊物Cell在其”Leading Edge”专栏中专文介绍并给予高度评价，认为这项研究是阐明水稻杂种优势的分子机理的一个起点（these findings provide a starting point for uncovering its mechanistic basis in one of the world’s most important food crops）
