Studies on Genetic Diversity among F1 Generation Group Materials of Sweet Potato

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    Ipomoea batatas(L.)Lam, is an important food crop which can be used as an industry material, a new energy resource and forage crop in the world. The main method of sweet potato breeding has commonly been selecting excellent materials from sexual reproduction F1 generation. In order to optimize the sweet potato’s hybrid breeding methods so as to match reasonable hybrid combinations and improve breeding efficiency,in this experiment, hybrid groups of sweet potato were studied based on SSR markers and 13 angronomic traits,and the cluster diagrams of the groups were gotten.High-yield strains were selected through this experiment. From cross group of SSR markers’ clustering analysis results, the distance between group materials and parents was far, group materials were clustered in three classes ,while parents gathered in another kind. The cluster analyses based on 13 angronomic traits of sweet potato hybrid groups herded parents with some group materials together,then its variation of genetic distance was up to 30% when group materials and parents were taken as a whole, which was far higher than that of SSR markers.

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  • Received:March 27,2014
  • Revised:May 30,2014
  • Adopted:January 28,2015
  • Online: February 03,2015
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