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Karyotypes and Chromosomal Differentiation in Cultivars of Tree Peony (Paeonia suffruticosa)

  • Received Date: 2011-12-01
  • 30 traditional cultivars of Paeonia suffruticosa with 10 different colors were selected as materials, and the squash method was used to analyze the features of chromosome. According to Stebbins theory of karyotypic evolution as well as using the method of coding of cladistics, 4 significant characters were analyzed. The results suggested that all the materials were diploid, 2n=10; the karyotypes mostly were 2A, and most was primitive type; the karyotype formulas mostly were 2n=6m+2sm+2st. The chromosomal differentiation of ‘Yin Fen Jin Lin’,‘Luo Yang Hong’ and ‘Ying Luo Bao Zhu’ was high, and that of ‘Gong Yang Zhuang’,‘Yi Pin Zhu Yi’ and ‘Chi Long Huan Cai’ was low. The importance of karyotype parameters was A.A.R > A.sk% > Lt/St > P.C.A%. The karyotypes were similar among different flower colors. The cultivars of the same color system had similar evolution levels, and the darker colors were more evolutional than the lighter ones. This research could provide some references for the study on evolution of traditional cultivars of P. suffruticosa
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Karyotypes and Chromosomal Differentiation in Cultivars of Tree Peony (Paeonia suffruticosa)

  • 1. State Key Laboratory of Forest Genetics and Tree Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China

Abstract: 30 traditional cultivars of Paeonia suffruticosa with 10 different colors were selected as materials, and the squash method was used to analyze the features of chromosome. According to Stebbins theory of karyotypic evolution as well as using the method of coding of cladistics, 4 significant characters were analyzed. The results suggested that all the materials were diploid, 2n=10; the karyotypes mostly were 2A, and most was primitive type; the karyotype formulas mostly were 2n=6m+2sm+2st. The chromosomal differentiation of ‘Yin Fen Jin Lin’,‘Luo Yang Hong’ and ‘Ying Luo Bao Zhu’ was high, and that of ‘Gong Yang Zhuang’,‘Yi Pin Zhu Yi’ and ‘Chi Long Huan Cai’ was low. The importance of karyotype parameters was A.A.R > A.sk% > Lt/St > P.C.A%. The karyotypes were similar among different flower colors. The cultivars of the same color system had similar evolution levels, and the darker colors were more evolutional than the lighter ones. This research could provide some references for the study on evolution of traditional cultivars of P. suffruticosa

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