Title: Chromosome Karyotype Analysis of Gynura bicolor
Abstract: The chromosome number and karyotype of Gynura bicolor young root tips were studied with enzymic hydrolysis method involving wall degradation and hypotonic treatment.G.bicolor was found to be diploid with the chromosome number of 2n=20,the karyotype formula of K(2n)=2x=20=20m,and basic chromosome number x=10.No satellites were found in the morphological observation of chromosomes,neither were chromosomes with arm ratio above 2.The ratio of chromosome length was 1.6384,belonging to 1Akaryotype,and primitive species.The coefficient of asymmetry was 56.05%,the chromosome was symmetrical type.The composition of relative length of chromosome was 2n=20=10M2+8M1+2S.This research provided the cytological basis for identify its germ plasm resources,further understanding,the cultivation and improved variety selection of G.bicolor.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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