中国特有的露蕊乌头亚属及铁破锣的染色体研究

The paper reports chromosomal number and chromosomal morphologies ofannual Aconitum gymnandrum endemic to China and Beesia calthifolia for the firsttime.  Of the two spcies, chromosome number is same (X=8, 2n=16) and chromosomeaverage lengths are 6.17μ , 10.73μ respectively.  The longest chromosome 1, the shortchromosomes 3-5, 7 and the shortest chromosome 8 are metacentrical (m), the chro-mosomes 2, 6 are submetacentrical (sm), and the pairs 4, 5, 8 have satellites in thekaryotype of A. gymnandrum.  In B. calthifolia, all of the chromosome 1-5 are thelong m, the chromosomes 6, 8 are the short sm and the 7 is telocentrical (t). The pairs3, 4, 6 have satellites.     According to the comparison of karyotypes of three subgenera—subgen. Para-conitum, subgen. Aconitum and subgen. Gymnaconitum in Aconitum, the evolution trendof chromosomes is further discussed.     Finally, the relationship between Aconitum and Beesia is also discussed in thispaper.

Chromosome Studies of Subgenus Gymnaconitum Endemic to China and Beesia (Ranunculaceae)

The paper reports chromosomal number and chromosomal morphologies ofannual Aconitum gymnandrum endemic to China and Beesia calthifolia for the firsttime.  Of the two spcies, chromosome number is same (X=8, 2n=16) and chromosomeaverage lengths are 6.17μ , 10.73μ respectively.  The longest chromosome 1, the shortchromosomes 3-5, 7 and the shortest chromosome 8 are metacentrical (m), the chro-mosomes 2, 6 are submetacentrical (sm), and the pairs 4, 5, 8 have satellites in thekaryotype of A. gymnandrum.  In B. calthifolia, all of the chromosome 1-5 are thelong m, the chromosomes 6, 8 are the short sm and the 7 is telocentrical (t). The pairs3, 4, 6 have satellites.     According to the comparison of karyotypes of three subgenera—subgen. Para-conitum, subgen. Aconitum and subgen. Gymnaconitum in Aconitum, the evolution trendof chromosomes is further discussed.     Finally, the relationship between Aconitum and Beesia is also discussed in thispaper.