【摘要】 以5种裸腹溞Moina为试验材料进行了染色体数目和核型的研究。染色体制片采用气干法,依据Levan等和Stebbins的标准进行染色体分类。结果表明:蒙古裸腹溞M.mongolica的核型公式为2N=6M+18T,NF=30,1A;多刺裸腹溞M.macrocopa,2N=10M+12T,NF=32,1A;直额裸腹溞M.rectirostris,2N=12M+12T,NF=36,1B;微型裸腹溞M.micrura,2N=10M+14T,NF=34,1A;近亲裸腹溞M.affinis,2N=12M+14T,NF=38,1B。在此基础上进一步探讨了5种裸腹溞的亲缘进化关系,认为5种裸腹溞按进化地位的高低顺序依次为直额裸腹溞>近亲裸腹溞>多刺裸腹溞>微型裸腹溞>蒙古裸腹溞。更多还原

【Abstract】 The chromosomal numbers and karyotypes of 5 species water fleas Moina were studied by the air-drying method.The chromosomes were classified by the methods of Levan et al.and Stebbins.The karyotype formula was found as following: 2N=24=6M +18T,NF=30,1A in M.mongolica;2N=22=10M+12T,NF=32,1A in M.macrocopa;2N=24=12M+12T,NF=36,1B in M.rectirostris;2N=24=10M+14T,NF=34,1A in M.micrura;2N=26=12M+14T,NF=38,1B in M.affinis.Furthermore,the evolutionary relationship among 5 species of Moina was discussed,and the comparable result revealed that the phylogenetic status was descendantly arranged as the following: M.rectirostris>M.affinis>M.macrocopa>M.micrura>M.mongolica.更多还原