[Molecular mapping of two semidwarf genes in an indica rice variety Aitaiyin3 (Oryza sativa L.)].
The rice dwarf variety Aitaiyin3 is derived from a semidwarf cultivar Taiyin1. Genetic analysis indicated that the dwarf phenotype in Aitaiyin3 is involved in two recessive loci. Using bulk analysis with SSR markers, the two loci were located on the chromosome 1 and chromosome 4, respectively. Moreover, the allelism test showed that the locus on the chromosome 1 is allelic to the semidwarf gene sd1, while the other one is a new locus, here was named as sdt2. Further molecular mapping showed that sd1 was linked with SSR markers in the order of RM297-RM302-RM212-OSR3-sd1 with genetic distances of 4.7 cM, 0 cM, 0.8 cM and 0 cM, respectively. The linkage relationship of sdt2 with five SSR markers was SSR332-RM1305-sdt2-RM5633-RM307-RM401 with genetic distances of 11.6 cM, 3.8 cM, 0.4 cM, 0 cM and 0.4 cM, respectively.
Zhao
Xiang-Qiang
XQ
The Agricultural College, Yangzhou University, Yangzhou 225009, China.
Liang
Guo-Hua
GH
Zhou
Jin-Song
JS
Yan
Chang-Jie
CJ
Cao
Xiao-Ying
XY
Gu
Ming-Hong
MH
D000483:Alleles; D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D003433:Crosses, Genetic; D017343:Genes, Plant; D005838:Genotype; D018895:Microsatellite Repeats; D012275:Oryza / Q000033:anatomy & histology / Q000145:classification / Q000235:genetics*; D011110:Polymorphism, Genetic