水稻籽粒伸长突变体lgdp的鉴定与基因定位
水稻粒形与产量和营养品质密切相关,挖掘水稻粒形发育相关基因并解析其分子机制,对提高水稻产量、改善籽粒营养品质具有重要意义.利用甲基磺酸乙酯(ethyl methanesulfonate,EMS)处理籼稻品种西大1B,获得了1个水稻粒形突变体,命名为long grain and degenerated palea(lgdp).lgdp表现出外稃伸长,从而导致籽粒长度增加的特征,进一步扫描电镜分析发现,lgdp籽粒变长主要原因是其外稃细胞数目极显著增加.遗传分析表明该性状受1对隐性基因调控;利用lgdp与ZH11杂交构建的F2分离群体,通过BSA法将目标基因定位在3号染色体分子标记ZLN43和ZL...
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| Published in | 作物学报 Vol. 49; no. 6; pp. 1699 - 1707 |
|---|---|
| Main Authors | , , , , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
西南大学水稻研究所 / 西南大学农业科学研究院 / 转基因植物与安全控制重庆市重点实验室, 重庆 400715
12.06.2023
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0496-3490 |
| DOI | 10.3724/SP.J.1006.2023.22028 |
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| Abstract | 水稻粒形与产量和营养品质密切相关,挖掘水稻粒形发育相关基因并解析其分子机制,对提高水稻产量、改善籽粒营养品质具有重要意义.利用甲基磺酸乙酯(ethyl methanesulfonate,EMS)处理籼稻品种西大1B,获得了1个水稻粒形突变体,命名为long grain and degenerated palea(lgdp).lgdp表现出外稃伸长,从而导致籽粒长度增加的特征,进一步扫描电镜分析发现,lgdp籽粒变长主要原因是其外稃细胞数目极显著增加.遗传分析表明该性状受1对隐性基因调控;利用lgdp与ZH11杂交构建的F2分离群体,通过BSA法将目标基因定位在3号染色体分子标记ZLN43和ZLN-1之间,物理距离大约810 kb.通过转录测序和PCR分析初步确认LGDP候选基因编码一个MADS-box基因.qPCR分析表明,LGDP可能通过负向调控GW7/GL7、GS3、TGW6等水稻粒长正向调控因子的表达,从而影响了颖壳细胞数目的增殖,进而影响籽粒长度.本研究结果为应用LGDP基因改良水稻粒形提供了新的资源. |
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| AbstractList | 水稻粒形与产量和营养品质密切相关,挖掘水稻粒形发育相关基因并解析其分子机制,对提高水稻产量、改善籽粒营养品质具有重要意义.利用甲基磺酸乙酯(ethyl methanesulfonate,EMS)处理籼稻品种西大1B,获得了1个水稻粒形突变体,命名为long grain and degenerated palea(lgdp).lgdp表现出外稃伸长,从而导致籽粒长度增加的特征,进一步扫描电镜分析发现,lgdp籽粒变长主要原因是其外稃细胞数目极显著增加.遗传分析表明该性状受1对隐性基因调控;利用lgdp与ZH11杂交构建的F2分离群体,通过BSA法将目标基因定位在3号染色体分子标记ZLN43和ZLN-1之间,物理距离大约810 kb.通过转录测序和PCR分析初步确认LGDP候选基因编码一个MADS-box基因.qPCR分析表明,LGDP可能通过负向调控GW7/GL7、GS3、TGW6等水稻粒长正向调控因子的表达,从而影响了颖壳细胞数目的增殖,进而影响籽粒长度.本研究结果为应用LGDP基因改良水稻粒形提供了新的资源. |
| Author | 李云峰 王子怡 李忠成 黄明江 李彦羲 庄慧 韦祎 陈锐 林孝欣 朱洪慧 |
| AuthorAffiliation | 西南大学水稻研究所 / 西南大学农业科学研究院 / 转基因植物与安全控制重庆市重点实验室, 重庆 400715 |
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| Author_FL | LI Yun-Feng LI Zhong-Cheng ZHUANG Hui WEI Yi HUANG Ming-Jiang WANG Zi-Yi LI Yan-Xi CHEN Rui ZHU Hong-Hui LIN Xiao-Xin |
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