Abstract:
The cytological features of 6 samples belonging to 5 species of
Allium L. are analysed in this paper. The karyotypes formulae of these species are as follows:
A. prattii C. H. Wright apud Forb. et Hemsl. (Ⅰ. Ⅱ.), Ⅰ. K(2n)=2x=16=9m+1m(SAT)+4sm+2st, Ⅱ. K(2n)=2x=16=10m+5sm+1sm(SAT);
A. paepalanthoides Airy-Shaw: K(2n)=2x=16=14m+2sm+3B;
A. plurifoliatum Rendle: K(2n)=2x=16=14m+2sm+1B;
A. tubiflorum Rendle: K(2n)=2x=16=12m+2m(SAT)+2sm;
A. omeiense Z. Y. Zhu: K(2n)=2x=22=2m+18sm+2T(SAT). All of investigated samples are diploid. The cytological results revealed a basis chromosome number of x=8 in all the investigated samples except
A. omeiense Z. Y. Zhu. The chromosome numbers and karyotypes of
A. plurifoliatum and
A. omeiense are reported here for first time. B-chromosome were detected in
A. paepalanthoides and
A. plurifoliatum. The cytological and taxonomic relationships of the investigated species are discussed.
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