Identification and genetic analysis of a thermo-sensitive seedling-colour mutant in rice (Oryza sativa L.)
Identification and genetic analysis of a thermo-sensitive seedling-colour mutant in rice (Oryza sativa L.)
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DOI：
10.1270/jsbbs.51.1
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发表时间：
2001-03-01
期刊：
影响因子：
2.4
通讯作者：
Jin, QS
中科院分区：
文献类型：
--
作者：
Dong, YJ;Dong, WQ;Jin, QS
1991年在我国的一个育种圃中发现了一个苗色温敏突变体7436S。试验在人工控制温度（23.1 ℃、26.1 ℃、20.1 ℃）的培养箱中进行。结果表明，突变体7436 S在播种后10 d的苗色分别为白色（23.1 ℃）、浅黄色（26.1 ℃）和正常绿色（30.1 ℃），在播种后20 d的苗色分别为黄绿色（23.1 ℃）和正常绿色（26.1 ℃，30.1 ℃）。结果表明，随着苗龄的增加，其温度敏感性逐渐降低。此外，它对幼苗颜色的温度敏感性是定向的，因为白色幼苗在高温下变成绿色，但不是相反的方向。如果F-2群体的分离比率表明，一对隐性核基因（暂命名为tsc-1）控制着苗色温敏性状。根据tsc-1基因与短穗形态标记（sp）基因在F2代的遗传连锁和重组值（34.1%），初步确定tsc-1基因位于第11染色体上。
A thermo-sensitive seedling-colour mutant 7436S was detected in the field from a breeding nursery in China, in 1991, The experiments were conducted at artificially controlled temperatures (23.1 degreesC, 26.1 degreesC, 20.1 degreesC) in growth chambers. The results showed that the seedling colour of the mutant 7436S was white (23.1 degreesC), light yellow (26.1 degreesC) and normal green (30.1 degreesC) at 10 days after sowing and yellowish green (23.1 degreesC) and normal green (26.1 degreesC, 30.1 degreesC) at 20 days after sowing, respectively. It was concluded that its thermo-sensitivity decreased gradually with the increase of the seedling age. In addition, its thermo-sensitivity for seedling colour was oriented, as white seedlings turned green at high temperatures, but not in the opposite direction. If he segregation ratios in the F-2 populations showed that a recessive nuclear gene (tentatively designated as tsc-1) controlled the thermo-sensitive seedling-colour character. Based on genetic linkage and the recombination value (34.1%) between the tsc-1 gene and short panicle morphological marker (sp) gene in the F-2 generation, the results indicated that the tsc-1 gene was located on chromosome 11.