Investigation and Diversity Analysis of Wild Actinidia Resources in Daba Mountain of Chongqing
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Chongqing Academy of Agricultural Scinces,Chongqing Academy of Agricultural Scinces,Chongqing Academy of Agricultural Scinces,Chongqing Academy of Agricultural Scinces,Chongqing Academy of Agricultural Scinces

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    Abstract:

    The field study and sampling, focusing on the analysis of the specificity and diversity of the wild Actinidia resources, have been made in order to address the present distribution and genetic diversity of such fruit resources in the Daba Mountain of Chongqing, for further protecting and exploiting such germplasm resources. The results showed that the wild Actinidia resources in this area, dominated by A. chinensis, A. deliciosa, and their hybrid types, also including A. venosa, A. callosa and A. arguta, are centrally distributed in high mountains, at an altitude of 978m to 1758m. In all survey areas, Chengkou County was the most abundant in wild Actinidia species. The analysis of fruit characters indicated that a great variety of phenotype diversity and resources specificity widely exist among the kiwifruits in the Daba Mountain of Chongqing. This was confirmed by SSR molecular markers from the genetic level. The 41 wild Actinidia resources can be divided into three types based on their maturity: 5 early-maturing kiwifruit varieties, 34 mid-maturing kiwifruit varieties and 2 late-maturing kiwifruit varieties. There were 14 kiwifruit resources with soluble solids above 15% and 4 kiwifruit resources with VC content more than 200 mg / 100 g. In addition, of them five with high practical value have been singled out. The conclusion could be drawn that the kiwifruit resources in the Daba Mountain of Chongqing have a great potential for domestication and breed improvement.

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History
  • Received:September 01,2017
  • Revised:December 15,2017
  • Adopted:December 18,2017
  • Online: March 19,2018
  • Published:
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