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Identification and genetic analysis of a thermo-sensitive seedling-colour mutant in rice (Oryza sativa L.)

文献类型: 外文期刊

作者: Dong, YJ 1 ; Dong, WQ 1 ; Shi, SY 1 ; Jin, QS 1 ;

作者机构: 1.Zhejiang Acad Agr Sci, Crop Res Inst, Hangzhou 310021, Peoples R China

关键词: thermo-sensitive;seedling colour;marker gene;rice

期刊名称:BREEDING SCIENCE ( 影响因子:2.086; 五年影响因子:2.632 )

ISSN: 1344-7610

年卷期: 2001 年 51 卷 1 期

页码:

收录情况: SCI

摘要: 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.

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