AFLP analysis among different ploidy levels of I pomoea species
Cultivar sweetpotato is a hexaploid species,of which the exact proceeding of origin and domestication of polyploidization has not been well defined. A diploid progenitor,a naturally crossed tetra-ploid,and three artificially synthesized tetraploid were used as materials to study the relationship between ploidy variations and numbers of DNA bands,to explore the phylogentic relationship of three new artificially sythesized interspicific hybrids with sweetpotato cultivar. The results show that the number of amplified AFLP bands is increasing accompanied with the increase of ploidy levels. The similarity coefficients among all pairs of six Ipomoea species varied from 0.54 to 0.90,all showing above 50％ genetic distance. The similarity coefficients between Xushu 18 and other 5 Ipomoea species are different and the order from high to low is as the following:H67-1 ,H10-1 ,H14-1, I. trifida and/. tabascana. It appears that the three new artificial hybrids are close relatives of Xushu18.
Ipomoea ploidy phylogeny AFLP
CAO Qing-he Wang Lu Tang Jun Zhao Dong Ian Zhou Zhilin
Sweetpotato Research Institute,Chinese Academy of Agricultural Sciences/National Sweetpotato Improvement Center,Sweeetpotato Genetics and Improvement Key Lab of CAAS,Xuzhou,Jiangsu
国际会议
徐州
英文
128-133
2010-11-27（万方平台首次上网日期，不代表论文的发表时间）