Journal
NEOTROPICAL ENTOMOLOGY
Volume 39, Issue 6, Pages 967-976Publisher
ENTOMOLOGICAL SOC BRASIL
DOI: 10.1590/S1519-566X2010000600019
Keywords
RAPD; genetic variation; AMOVA; dendrogram
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Funding
- National Natural Science Foundation of China [30800803, 30671591]
- Hi-Tech Research and Development (863) Program of China [2006AA 10A 117]
- National Modern Agriculture Industry Technology System Construction Project (Silkworm and Mulberry)
- Scientific Research Project for Commonwealth Industry of the Agricultural Ministry [nyhyzx07-020-17]
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The genetic diversity and genetic structure of three Chinese silkworm species Bombyx mori L., Antheraea pernyi Guerin-Meneville and Samia cynthia ricini Donovan were comparatively assessed based on RAPD markers. At the species level, A. pernyi and B. mori showed high levels of genetic diversity, whereas S. cynthia ricini showed low level of genetic diversity. However, at the strain level, A. pernyi had relatively highest genetic diversity and B. mori had lowest genetic diversity. Analysis of molecular variance (AMOVA) suggested that 60% and 72% of genetic variation resided within strains in A. pernyi and S. cynthia ricini, respectively, whereas only 16% of genetic variation occurred within strains in B. mori. In UPGMA dendrogram, individuals of A. pernyi and B. mori formed the strain-specific genetic clades, whereas those of S. cynthia ricini were distributed in a mixed way. The implications of these results for the conservation and utilization in breeding programs of three silkworm species are discussed.
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