Abstract:

Abstract: DNA sequence comparison analysis is most abroad in plant phylogenetic research. At present, DNA sequence analysis is changed from common DNA fragment (cpDNA, nrDNA) to LCNG (Low-copy nuclear gene), COS (Conserved Ortholog Set) markers check LCNG site. The characteristics and development of COS markers and also their utilization and applications foreground in Pyrus are briefly reviewed in this article, which could apply a new method for resovling phylogenetic problems in Pyrus.