%A Yan Yi-Xiang, Huang Rui-Fu, Wei Rong-Cheng, Xu Jie-Mei
%T Studies on the Karyotype of 5 Samples of Allium Sect. Bromatorrhiza Ekberg
%0 Journal Article
%D 1990
%J J Syst Evol
%R
%P 177-184
%V 28
%N 3
%U {https://www.jse.ac.cn/CN/abstract/article_17456.shtml}
%8 1990-05-10
%X The karyotypes of 5 samples in Allium Sect. Bromatorrhiza Ekberg were
analysed in this paper.
In Allium wallichii Kunth, the first sample is a diploid, with genome formula is AA and
karyotype formula is K(2n)=2x=14=2m(SAT)+2m+10sm. The second is an autotetraploid,
with genome formula AAAA, karyotype formul K(2n)=4x=28=2m(SAT)+6m+20sm. These
two karyotypes belong to “3A”. The two karyotypes of A. wallichii Kunth are similar in
morphology, though different in ploidy.
In Allium hookeri Thwaites, the first sample is a dibasic autoallotriploid. Its genome
formula is AAB_{1}; the basic number of the genome A is 7 and that of the genome B_{1} is 8. The
karyotype formula is K(2n)=2x+x'=22=(12sm+2t)+(1m+4sm+1st+2t). The second is
also an autoallotriploid. The genomes in pairs are similar to those in the first sample in size
and morphology of chromosomes. However, the unpaired genome differs from the first one
apparently. Therefore, its genome formula is AAB_{2}, and karyotype formula is K(2n)=2x+
x'=22=(12sm+2t)+(3m+1sm+2st+2t). The third is doubling of the first karyotype. It is
an autoallohexaploid, with genome formula AAAAB_{1} B_{1} and karyotype formula K(2n)=4x+2x'= 44= (24sm+4t) + (2m+8sm+2st+4t). These three karyotypes belong to “3A”.