Analysis of QTLs for yield-related traits in Yuanjiang common wild rice (Oryza rufipogon Griff.).
Using an accession of common wild rice (Oryza rufipogon Griff.) collected from Yuanjiang County, Yunnan Province, China, as the donor and an elite cultivar 93-11, widely used in two-line indica hybrid rice production in China, as the recurrent parent, an advanced backcross populations were developed. Through genotyping of 187 SSR markers and investigation of six yield-related traits of two generations (BC(4)F(2) and BC(4)F(4)), a total of 26 QTLs were detected by employing single point analysis and interval mapping in both generations. Of the 26 QTLs, the alleles of 10 (38.5%) QTLs originating from O. rufipogon had shown a beneficial effect for yield-related traits in the 93-11 genetic background. In addition, five QTLs controlling yield and its components were newly identified, indicating that there are potentially novel alleles in Yuanjiang common wild rice. Three regions underling significant QTLs for several yield-related traits were detected on chromosome 1, 7 and 12. The QTL clusters were founded and corresponding agronomic traits of those QTLs showed highly significant correlation, suggesting the pleiotropism or tight linkage. Fine-mapping and cloning of these yield-related QTLs from wild rice would be helpful to elucidating molecular mechanism of rice domestication and rice breeding in the future.
State Key Laboratory of Plant Physiology and Biochemistry, National Center for Evaluation of Agricultural Wild Plants (Rice), Laboratory of Crop Heterosis and Utilization of Ministry of Education, Beijing Key Laboratory of Crop Genetic Improvement, Key Laboratory of Crop Genetic Improvement and Genome of Ministry of Agriculture, Department of Plant Genetics and Breeding, China Agricultural University, Beijing 100193, China.
Qiang
Q
Fu
Peijiang
P
Zhang
Lubin
L
Tan
Zuofeng
Z
Zhu
Dan
D
Ma
Yongcai
Y
Fu
Xinchun
X
Zhan
Hongwei
H
Cai
Chuanqing
C
Sun
D002681:China; D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics; D003433:Crosses, Genetic; D018744:DNA, Plant / Q000235:genetics; D005838:Genotype; D018895:Microsatellite Repeats; D012275:Oryza / Q000235:genetics* / Q000254:growth & development; D010641:Phenotype; D011110:Polymorphism, Genetic; D040641:Quantitative Trait Loci
D018744:DNA, Plant