水稻早衰叶突变体PLS2的遗传分析与基因定位
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1 Rice and Sorghum Research Institute,Sichuan Academy of Agricultural Sciences/Key Laboratory of Southwest Rice Biology and Genetic Breeding,Ministry of Agriculture,Deyang 618000,China;2 Luzhou Branch of National Rice Improvement Center,Luzhou 646100,China;3Institute of Crop Science,Chinese Academy of Agricultural Sciences,Beijing 100081,China;4 Crop Research Institute,Sichuan Academy of Agricultural Sciences,Chengdu 610066,China;5Bioengineering College,Chongqing University,Chongqing 400044,China
Genetic A nalysis and Fine Mapping of a Premature Leaf Senescence M utant in
Rice(Orzya sativa L.)
ZHANG Tao1,2,**,SUN Yu-Ying3,**,ZHENG Jian-Min4,**,CHENG Zhi-Jun3,JIANG Kai-Feng1,2,YANG Li1,2,CAO Ying-Jiang1,2,YOU Shu-Mei1,2,WAN Jian-Min3,and ZHENG Jia-Kui1,2,5,*
Abstract:Leaf senescence induces degradation of chlorophyll and other macromolecules,reducing leaf photosynthetic capacity. This process is accompanied by the accumulation of reactive oxygen species(ROS),the decreasing of cell antioxidant enzyme (SOD,CAT,andAPX)activity,and the increasing of aging related gene(SAG)expression,leading in early maturity and yield reduction.Therefore,studies on the genetic mechanism and gene function of premature senescence in rice,has the important effect and significance in genetic improvement of rice.PLS2 from space radiation mutation breeding project showed leaf senility,at booting pared with the wild type,in PLS2 the photosynthetic capacity decreased,the plant height,intemode and panicle length shortened,tiller and effective tiller number reduced,number of grains per ear and seed setting rate were significantly lower,1000-grainweight decreased,main panicle was stunted and grain-filling was not full.CAT activity decreased significantly in leaves,H2O2 accumulated,and the number of dead cell increased,chloroplast structures in leaves were worse,with more
作物学报 ACTA AGRONOMICA SINICA 2014,40(12):2070-7080 ISSN 0496-3490;CODENTSHPA9
DOI:10.3724/SP.J.1006.2014.02070
http:/// E-mail:xbzw@
水稻早衰叶突变体PLS2的遗传分析与基因定位
张 涛 孙玉莹 郑建敏 程治军 1,2,**
3Байду номын сангаас,**
4 ,**
3
曹应江 游书梅 , 万建民 郑家奎 1,2
12
3
1,2,5,*
蒋开锋1,2
杨 莉1,2
1 四川省农业科学院水稻高粱研究所/农业部西南水稻生物学与遗传育种重点实验室,四川德阳 618000;2 国家水稻改良中心四川泸 州分中心,四川泸州 646100;3 中国农业科学院作物科学研究所,北京 100081;4 四川省农业科学院作物研究所,四川成都 610066;5 重
庆大学生物工程学院,重庆 400044
摘 要:叶片早衰引起叶绿素和其他大分子被降解,叶片光合能力降低。这个过程常伴随着活性氧(ROS)的积累,以 及细胞中抗氧化酶(SOD、CAT和APX)活性的降低,衰老相关基因(SAG)表达量上调,最终导致整个植株过早成熟, 产量降低。因此,研究水稻早衰遗传机制和基因功能对于水稻的遗传改良具有重要的作用和意义。PLS2是通过航天 育种工程经空间辐射诱变得来的突变体,在孕穗期表现早衰。与野生型相比,PLS2的光合能力降低,株高变矮,节间 和穗长缩短,分蘖数和有效分蘖数减少,穗粒数和结实率明显下降,千粒重降低,穗发育不良,灌浆不充分;叶片的 CAT活性显著降低、H2O2积累、死亡细胞增加,叶绿体结构变差,叶绿体中淀粉和嗜锇颗粒增多。黑暗处理加速突 变体叶片衰老,叶绿体超微结构球状化。利用PLS2/蜀恢527和PLS2/02428的隐性定位群体,将pls2定位在第3染 色体标记RM14704(8674283bp)与SL-I-5(8758394bp)之间,物理距离84.11kb,区间内包括14个基因,测序发现 在LOC_Os03g15840第9个外显子第41位的C被替换为T,导致精氨酸(R)替换为半胱氨酸(C),LOC_Os3g15840编 码水稻中的一个糖基转移酶(glycosyltransferases,GTs),可能是pls2的候选基因。为下一步调控基因的克隆和功能研 究奠定了基础。 关键词:叶片衰老;叶绿体;图位克隆;糖基转移酶
Genetic A nalysis and Fine Mapping of a Premature Leaf Senescence M utant in
Rice(Orzya sativa L.)
ZHANG Tao1,2,**,SUN Yu-Ying3,**,ZHENG Jian-Min4,**,CHENG Zhi-Jun3,JIANG Kai-Feng1,2,YANG Li1,2,CAO Ying-Jiang1,2,YOU Shu-Mei1,2,WAN Jian-Min3,and ZHENG Jia-Kui1,2,5,*
Abstract:Leaf senescence induces degradation of chlorophyll and other macromolecules,reducing leaf photosynthetic capacity. This process is accompanied by the accumulation of reactive oxygen species(ROS),the decreasing of cell antioxidant enzyme (SOD,CAT,andAPX)activity,and the increasing of aging related gene(SAG)expression,leading in early maturity and yield reduction.Therefore,studies on the genetic mechanism and gene function of premature senescence in rice,has the important effect and significance in genetic improvement of rice.PLS2 from space radiation mutation breeding project showed leaf senility,at booting pared with the wild type,in PLS2 the photosynthetic capacity decreased,the plant height,intemode and panicle length shortened,tiller and effective tiller number reduced,number of grains per ear and seed setting rate were significantly lower,1000-grainweight decreased,main panicle was stunted and grain-filling was not full.CAT activity decreased significantly in leaves,H2O2 accumulated,and the number of dead cell increased,chloroplast structures in leaves were worse,with more
作物学报 ACTA AGRONOMICA SINICA 2014,40(12):2070-7080 ISSN 0496-3490;CODENTSHPA9
DOI:10.3724/SP.J.1006.2014.02070
http:/// E-mail:xbzw@
水稻早衰叶突变体PLS2的遗传分析与基因定位
张 涛 孙玉莹 郑建敏 程治军 1,2,**
3Байду номын сангаас,**
4 ,**
3
曹应江 游书梅 , 万建民 郑家奎 1,2
12
3
1,2,5,*
蒋开锋1,2
杨 莉1,2
1 四川省农业科学院水稻高粱研究所/农业部西南水稻生物学与遗传育种重点实验室,四川德阳 618000;2 国家水稻改良中心四川泸 州分中心,四川泸州 646100;3 中国农业科学院作物科学研究所,北京 100081;4 四川省农业科学院作物研究所,四川成都 610066;5 重
庆大学生物工程学院,重庆 400044
摘 要:叶片早衰引起叶绿素和其他大分子被降解,叶片光合能力降低。这个过程常伴随着活性氧(ROS)的积累,以 及细胞中抗氧化酶(SOD、CAT和APX)活性的降低,衰老相关基因(SAG)表达量上调,最终导致整个植株过早成熟, 产量降低。因此,研究水稻早衰遗传机制和基因功能对于水稻的遗传改良具有重要的作用和意义。PLS2是通过航天 育种工程经空间辐射诱变得来的突变体,在孕穗期表现早衰。与野生型相比,PLS2的光合能力降低,株高变矮,节间 和穗长缩短,分蘖数和有效分蘖数减少,穗粒数和结实率明显下降,千粒重降低,穗发育不良,灌浆不充分;叶片的 CAT活性显著降低、H2O2积累、死亡细胞增加,叶绿体结构变差,叶绿体中淀粉和嗜锇颗粒增多。黑暗处理加速突 变体叶片衰老,叶绿体超微结构球状化。利用PLS2/蜀恢527和PLS2/02428的隐性定位群体,将pls2定位在第3染 色体标记RM14704(8674283bp)与SL-I-5(8758394bp)之间,物理距离84.11kb,区间内包括14个基因,测序发现 在LOC_Os03g15840第9个外显子第41位的C被替换为T,导致精氨酸(R)替换为半胱氨酸(C),LOC_Os3g15840编 码水稻中的一个糖基转移酶(glycosyltransferases,GTs),可能是pls2的候选基因。为下一步调控基因的克隆和功能研 究奠定了基础。 关键词:叶片衰老;叶绿体;图位克隆;糖基转移酶