| 两份新株型水稻品系的农艺性状与遗传特性分析 |
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| 引用本文： | 梁程,向珣朝,张欧玲,游慧,许亮,陈永军.两份新株型水稻品系的农艺性状与遗传特性分析[J].中国水稻科学,2022,36(2):171-180. |
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| 作者姓名： | 梁程 向珣朝 张欧玲 游慧 许亮 陈永军 |
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| 作者单位： | 西南科技大学 植物分子遗传育种实验室,四川 绵阳621010 |
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| 基金项目： | 四川省科技厅重点研发计划(重大科技专项)(2019YFN0019);西南科技大学研究生创新基金资助项目(20ycx0038)。 |
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| 摘 要： | 目的]理想株型水稻能提高光合作用效率、经济产量和抗病能力.通过探究两份新株型水稻种质的农艺性状变异和遗传特性,为水稻高产抗病育种提供优异理想株型种质资源.方法]以两个重组自交系中发现的两份自然重组的新株型种质08yi和RIL60以及由同一自交系选育出来的常规种质08yc和RILc为材料,进行不同生长时期的株型构成因...
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| 关 键 词： | 水稻(Oryza sativa L.) 理想株型 农艺性状 遗传特性 IPA1基因 |
| 收稿时间： | 2021-02-06 |
| 修稿时间： | 2021-06-03 |
Analyses on Agronomic Traits and Genetic Characteristics of Two New Plant-architecture Lines in Rice |
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| LIANG Cheng,XIANG Xunchao,ZHANG Ouling,YOU Hui,XU Liang,CHEN Yongjun.Analyses on Agronomic Traits and Genetic Characteristics of Two New Plant-architecture Lines in Rice[J].Chinese Journal of Rice Science,2022,36(2):171-180. |
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| Authors: | LIANG Cheng XIANG Xunchao ZHANG Ouling YOU Hui XU Liang CHEN Yongjun |
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| Institution: | Laboratory of Plant Molecular Genetics and Breeding, Southwest University of Science and Technology, Mianyang 621010, China |
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| Abstract: | 【Objective】Ideal plant-architecture(IPA)can increase photosynthetic efficiency,economic yield and resistance to disease of rice.The objective is to develop excellent germplasms with IPA for high-yield and resistance breeding by exploring variation in traits and genetic characteristics of two rice germplasm with new plant-architectures.【Method】The two germplasms‘08yi’and‘RIL60’with new plant-architecture from two recombinant inbred lines(RIL)by natural recombination,and their corresponding conventional germplasm‘08yc’and‘RILc’from the same RIL were used as materials.The constitute factors of plant architecture,yield traits in different developmental periods,as well as sequencing of IPA1 gene and waxy identification in four germplasm were comparatively analyzed.【Result】The functional leaf traits,dry matter accumulation at different developmental stages as well as panicle and yield traits of the two new lines were significantly different from those of conventional germplasms.Compared to the corresponding conventional germplasm,‘08yi’and‘RIL60’were featured with favorable variations including reduced angles of functional leaf,proper leaf length,compact plant architecture,an increase of 1-2 panicle in the effective panicles per plant and increased seed setting rate by 7.37%and 5.09%,respectively.In addition,the chlorophyll contents of the new germplasm‘08yi’significantly increased,and the stem of‘RIL60’was thicker than that of‘RILc’.The panicle traits of the two new germplasm under stress condition were better because they had smaller reduction of economic yield and stronger stress resistance compared to their corresponding conventional germplasm.However,their unfavorable variations include decreased panicle weight,shorter panicle length,decreased number of grains per panicle,seeds,branch length and branch number.The results of IPA1 gene sequencing showed that there were no mutations at 874 site of IPA1(C→A)in the two new germplasm compared with the Shaoniejing ipa1,and the variation of plant architecture was attributed to other factors.The result of waxy identification showed that‘RIL60’had waxy variation.【Conclusion】Thanks for preferred variation in agronomic traits,the two new lines can be used as excellent germplasms for IPA breeding and research.As a glutinous rice variety with IPA and economic yield equal to non-glutinous rice,RIL60 has enormous potential for extension. |
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| Keywords: | rice(Oryza sativa L ) ideal plant architecture agronomic trait genetic characteristics IPA1 gene |
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