【摘要】 分析了葱属(Allium L.)5个种6个居群的细胞学特征。这些种是太白韭(A.prattii C.H.Wright apud Forb.et Hemsl.),该种包括两个居群(Ⅰ、Ⅱ)。居群Ⅰ:K(2n)=2x=16=9m+1m(SAT)+4sm+2st,居群Ⅱ:K(2n)=2x=16=10m+5sm+1sm(SAT);天蒜(A.PaePalanthoides Airy-Shaw):K(2n)=2x=16=14m+2sm+3B;多叶韭(A.Plurifoliatum Rendle):K(2n)=2x=16=14m+2sm+1B;合被韭(A.tubiflorum Rendle):K(2n)=2x=16=12m+2m(SAT)+2sm;峨眉韭(A.omeiense Z.Y.Zhu):K(2n)=2x=22=2m+18sm+2T(SAT)。所研究的6批材料均为二倍体,除合被韭的核型为“1A”型,蛾眉韭的核型为“3A”型外,其余4批材料的核型均为“2A”型。其中峨眉韭和多叶韭的染色体数目为首次报道,天蒜和多叶韭的细胞中首次发现B染色体,并对其相互关系进行了探讨。更多还原

【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.更多还原