The leaf blade consists of color and shape traits.Studies of leaf-blade development are important for improvement of rice yield and quality because it is an essential organ for photosynthesis.A narrow and upper-albino...The leaf blade consists of color and shape traits.Studies of leaf-blade development are important for improvement of rice yield and quality because it is an essential organ for photosynthesis.A narrow and upper-albino leaf mutant(nul1) was identified from among progeny of the indica restorer line Jinhui10 raised from seeds treated with ethyl methane sulfonate.Under field conditions,the mutant displayed narrow and upper-albino leaf blades with significantly decreased photosynthetic pigment contents throughout their development.The narrow-leaf trait is caused by a decreased number of small veins.In contrast to the wild type,the growth period was extended by approximately 8 d and agronomic traits,such as effective panicle number,percentage seed set and 1000-grain weight,declined significantly in the nul1 mutant.Genetic analysis suggested that the narrow and upper-albino leaf characteristics showed coseparation and were controlled by one recessive gene.The Nul1 gene was mapped onto chromosome 7 between the Indel marker Ind07-1 and the Simple Sequence Repeat marker RM21637.The physical distance between the markers was 75 kb and eight genes were annotated in this region based on the rice Nipponbare genome sequence.These results provide a foundation for cloning and function analysis of Nul1.展开更多
在水稻品种宜香B中发现了一个白化转绿叶突变体,经过多代自交获得了稳定的白化转绿叶色突变体。该突变体在4叶期前叶色为黄绿色,之后逐渐变绿,从苗龄4周到12周,突变体/野生型叶绿素含量比值从34.5%逐渐升高到99.4%。遗传分析表明该突变...在水稻品种宜香B中发现了一个白化转绿叶突变体,经过多代自交获得了稳定的白化转绿叶色突变体。该突变体在4叶期前叶色为黄绿色,之后逐渐变绿,从苗龄4周到12周,突变体/野生型叶绿素含量比值从34.5%逐渐升高到99.4%。遗传分析表明该突变受1对隐性核基因控制,暂命名为gra。利用微卫星标记将gra初步定位于第10染色体标记RM596和RM5620之间,进一步利用极端个体定位法把gra精细定位于标记RM25522和RM25535之间。gra基因距RM25522和RM25535标记的遗传距离均为0.05 c M,其物理距离约为136 kb。展开更多
基金supported by the National Natural Science Foundation of China (31171178)the Fundamental Research Funds for the Central Universities (XDJK2009B019)
文摘The leaf blade consists of color and shape traits.Studies of leaf-blade development are important for improvement of rice yield and quality because it is an essential organ for photosynthesis.A narrow and upper-albino leaf mutant(nul1) was identified from among progeny of the indica restorer line Jinhui10 raised from seeds treated with ethyl methane sulfonate.Under field conditions,the mutant displayed narrow and upper-albino leaf blades with significantly decreased photosynthetic pigment contents throughout their development.The narrow-leaf trait is caused by a decreased number of small veins.In contrast to the wild type,the growth period was extended by approximately 8 d and agronomic traits,such as effective panicle number,percentage seed set and 1000-grain weight,declined significantly in the nul1 mutant.Genetic analysis suggested that the narrow and upper-albino leaf characteristics showed coseparation and were controlled by one recessive gene.The Nul1 gene was mapped onto chromosome 7 between the Indel marker Ind07-1 and the Simple Sequence Repeat marker RM21637.The physical distance between the markers was 75 kb and eight genes were annotated in this region based on the rice Nipponbare genome sequence.These results provide a foundation for cloning and function analysis of Nul1.
文摘在水稻品种宜香B中发现了一个白化转绿叶突变体,经过多代自交获得了稳定的白化转绿叶色突变体。该突变体在4叶期前叶色为黄绿色,之后逐渐变绿,从苗龄4周到12周,突变体/野生型叶绿素含量比值从34.5%逐渐升高到99.4%。遗传分析表明该突变受1对隐性核基因控制,暂命名为gra。利用微卫星标记将gra初步定位于第10染色体标记RM596和RM5620之间,进一步利用极端个体定位法把gra精细定位于标记RM25522和RM25535之间。gra基因距RM25522和RM25535标记的遗传距离均为0.05 c M,其物理距离约为136 kb。
