[Objective]This study aims to identify the karyotypic characteristics and genetic relationships of 12 species of Oxalis from a cytologic view,in order to provide a reference for exploring chromosome diver-sity of Oxalis,identifying germplasm resources of Oxalis,and selecting parents for cross-breeding.[Methods]The chromosome morphology,number,and karyotype of 12 species of Oxalis plants were ob-served and analyzed by the root-tip compression method.[Results](1)Chromosome numbers were repor-ted for the first time for 7 species.Of the 5 reported species,O.fabaefolia and O.pes-caprae had chro-mosome numbers consistent with previous reports,while the remaining 3 differed from previous reports,of which 2n=26 was the rarely reported chromosome number in the genus Oxalis.A total of 7 chromo-some bases were found,of which x=13 was rarely reported,and ploidy ranged from 2x to 6x.Actual chromosome sizes ranged from 0.27 μm to 2.23 μm.The location of the attachment point was the meta-centric(m)and submetacentric(sm)chromosomes.There were 4 karyotype types and the karyotype asymmetry coefficients ranged from 56.31％to 65.40％.(2)O.fabaefolia was the most evolved while O.compressa was the most primitive.(3)According to the similarity of chromosomal karyotypes,the 12 species of Oxalis can be divided into 4 groups.[Conclusion]The 12 species of Oxalis have extensive kary-otypic diversity.Karyotypic classification is not in complete agreement with the morphological classifica-tions of previous reports.
NETL
NSTL
万方数据
维普
