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Construction of near isogenic lines for Pericarp Color and Evaluation on Their near isogenicity in Rice

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Rice science 2009年第4期16卷 261-266页

作者： WANG Xiao-guang JI Zhi-juan CAI Jing MA Liang-yong LI Xi-ming YANG Chang-deng State Key Laboratory of Rice Biology China National Rice Research Institute Hangzhou 310006 China

The inheritance of purple pericarp was studied through genetic analysis using F2, BC1F1 and F3 from a cross between a purple pericarp rice variety Zixiangnuo and a white pericarp rice variety Chunjiangnuo 2. Seven pairs of near isogenic lines （NILs） for pericarp color of rice were further constructed. Genetic analysis indicated that the purple pericarp was controlled by two complementary genes （Pb and Pp）. Agronomic trait analysis and polymorphism analysis using SSR markers on these seven pairs of NILs were used in the evaluation of near-isogenicity. No significant differences in agronomic traits were found except 1000-grain weight between the NILs. The polymorphic SSR markers for the parents were only detected in target segments of the five pairs of NILs different in Pb, which revealed the ideal near isogenicity of them. However, for the two pairs of NILs different in Pp, the polymorphic markers for the two parents were detected as well as in non-targeted segments of chromosomes 11 and 12, respectively.

关键词： pericarp color near isogenic line agronomic trait molecular marker near isogenicity rice

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Development of Heat Tolerant Two-line Hybrid Rice Restorer line Carrying Dominant Locus of OsHTAS

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Rice science 2021年第1期28卷 99-108页

作者： Mehmood Jan Gulmeena Shah Huang Yuqing Liu Xuejiao Zheng Peng Du Hao Chen Hao Tu Jumin Zhejiang Key Laboratory of Crop Germplasm Resources Institute of Crop ScienceZhejiang UniversityHangzhou 310058ZhejiangChina

In order to create novel germplasm resources for breeding heat tolerant variety,we transferred a dominant allele OsHTAS,previously characterized and cloned from a high-temperature tolerant local variety HT54,which was collected from the rice production area of southern China,into a high-temperature sensitive intermediate breeding line HT13 through six rounds of successive backcross by using marker-assisted *** molecular analysis showed that the recovery of genetic background of a resultant near isogenic line(NIL),MHT13,was around 99.8%.The OsHTAS gene introduced in the MHT13 expressed normally in the HT13 genetic background,mediating heat tolerance and phenotype similar to those of the donor parent *** major agronomic traits of MHT13 resembled those of the recurrent parent ***,MHT13 had high general combining ability and its rice quality reached the grade 3 standard of edible high-quality rice issued by Ministry of Agriculture of the People’s Republic of China,which greatly improved its application value in rice production.

关键词： rice heat tolerance high temperature yield near isogenic line marker-assisted selection grain quality OsHAT gene

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Genetic Identification of a New Small Grain Dwarf Gene in Rice

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Rice science 2003年第1期10卷 11-15页

作者： WuCheng LIXiu-lan DENGXiao-jian WANGPing-rong LIRen-duan YANGZhi-rong CollegeofLifeScience SichuanUniversityChengdu610064China RiceResearchInstitute SichuanAgriculturalUniversityChengdu611130China

The plant material used in the study was rice line 162d, a new small grain dwarf mutant. Polymorphic analysis of 221 SSR loci demonstrated that 162d derived from a semidwarf variety Shuhui 162 through mutation, and 162d and Shuhui 162 were just a pair of near isogenic lines. Genetic analysis of F_1 and F_2 populations suggested that dwarfism in 162d was controlled by a single recessive gene. Phenotypic characteristics of the mutant gene were that plant height was about a quarter of normal height, grain size about a quarter of normal size, leaf was short and broad, and seed setting rate was very low, compared with the near isogenic line Shuhui 162. The mutant gene was sensitive to gibberellin (GA_3) treatment and did not located on the region near the centromere of rice chromosome 5, where dl gene located. Therefore, it was concluded that the mutant gene of 162d was a new small grain dwarf gene in rice.

关键词： rice dwarf gene genetic identification genetic marker gene location near isogenic line

Genetic Identification of a New Small Grain Dwarf Gene in Rice

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Rice Science 2003年第Z1期 11-15页

作者： WU Cheng~1, LI Xiu-lan~2, DENG Xiao-jian~(1,2), WANG Ping-rong~2, LI Ren-duan~2, YANG Zhi-rong~1 (~1 College of Life Science, Sichuan University, Chengdu 610064, China ~2 Rice Research Institute, Sichuan Agricultural University, Chengdu 611130, China)

The plant material used in the study was rice line 162d, a new small grain dwarf mutant. Polymorphic analysis of 221 SSR loci demonstrated that 162d derived from a semidwarf variety Shuhui 162 through mutation, and 162d and Shuhui 162 were just a pair of near isogenic lines. Genetic analysis of F1and F2populations suggested that dwarfism in 162d was controlled by a single recessive gene. Phenotypic characteristics of the mutant gene were that plant height was about a quarter of normal height, grain size about a quarter of normal size, leaf was short and broad, and seed setting rate was very low, compared with the near isogenic line Shuhui 162. The mutant gene was sensitive to gibberellin （GA3） treatment and did not located on the region near the centromere of rice chromosome 5, where dl gene located. Therefore, it was concluded that the mutant gene of 162d was a new small grain dwarf gene in rice.

关键词： rice dwarf gene genetic identification genetic marker gene location near isogenic line

Identification of a locus increasing seed number and yield and physiological analysis of its function in rapeseed(Brassica napus L.)

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Identification of a locus increasing seed number and yield a...