Identification and molecular tagging of two complementary dominant resistance genes to maize dwarf mosaic virus.
Maize dwarf mosaic is one of the devastating and widespread viral diseases in the world. So far, only a few genes were identified and mapped in the resistant materials. A new resistant elite inbred line Siyi was identified with resistance to maize dwarf mosaic virus strain B at early and adult stage. Two complementary dominant genes conditioned the resistance, with a new genetic model, of the maize inbred line were found at adult stage by the genetic analysis based on parents, F1, F2 and backcrosses in two years. The microsatellite analysis of a F2 population from the cross between Siyi and Mo17 was used to identify the two resistance genes on chromosome 3 and 6 respectively by 87 pairs of microsatellite markers. The linkage distance between phi029 and the one resistance gene on chromosome 3 is 14.5 cM, and phi126 to the other on chromosome 6 is 7.2 cM.
Wu
Jian-Yu
JY
College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China. wtongpublic2.zz.ha.cn
Ding
Jun-Qiang
JQ
Du
Yan-Xiu
YX
Chen
Wei-Cheng
WC
D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics; D003433:Crosses, Genetic; D005799:Genes, Dominant / Q000235:genetics*; D017343:Genes, Plant / Q000235:genetics; D007113:Immunity, Innate / Q000235:genetics; D018895:Microsatellite Repeats; D009029:Mosaic Viruses / Q000254:growth & development*; D010935:Plant Diseases / Q000235:genetics / Q000821:virology; D003313:Zea mays / Q000235:genetics* / Q000821:virology