Differential Gene Expression Between Hybrids and Their Parents During the Four Crucial Stages of Cotton Growth and Development

文献类型： 外文期刊

第一作者： Zhao Yun-lei

作者： Zhao Yun-lei;Yu Shu-xun;Xing Chao-zhu;Fan Shu-li;Song Mei-zhen;Ye Wu-wei

作者机构：

关键词： cotton;heterosis;molecular mechanism;gene expression;differential display

期刊名称：AGRICULTURAL SCIENCES IN CHINA （ 影响因子：0.82； 五年影响因子：0.997 ）

ISSN： 1671-2927

年卷期： 2009 年 8 卷 2 期

页码：

收录情况： SCI

摘要： The study aims to clarify the differential gene expression between cotton hybrids and their parents in order to better understand the molecular basis of cotton heterosis. The research focused on cotton heterotic and lower heterotic hybrids and their parents during the four crucial stages, which were analyzed using a differential display technique. The results indicated that there were both quantitative and qualitative differences in gene expression amongst them. The quantitative differences include over- and under-expression of parental genes and the dominant expression of highly-expressed parental genes in hybrids. In contrast, the qualitative differences are the following: (i) Bands were observed in both parents but not in the F(1) hybrid (BPnF(1)); (ii) bands occurred in either of the parents but not in the F(1) hybrid (UPnF(1)); (iii) bands presented only in the F(1) hybrid but not in either of the parents (UF(1)nP); and (iv) bands were detected in either of the parents and the F(1) hybrid (UPF(1)). Overall, the major differences of gene expression occurred in the qualitative level and four related differential patterns were observed. Furthermore, the amount of differential patterns during the flowering stage was relatively higher than those of other stages. At this juncture, both the amount of hybrid-specific expression patterns at flowering stage and the silenced expression patterns at boll-forming stage in highly heterotic hybrids were found higher than those in the lower heterotic ones. It was concluded that significant differences of gene expression in leaves were present between cotton hybrid and its parents during the whole growing stages. Hence, these differences might be responsible for the observed cotton heterosis.

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