Document Detail


A comparative study of chromosome morphology among the nine annual species of Cicer L.
MedLine Citation:
PMID:  10697744     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Thirty-six accessions, representing the full complement of all the nine annual Cicer L. species, viz C. arietinum, C. reticulatum, C. echinospermum, C. pinnatifidum, C. judaicum, C. bijugum, C. chorassanicum, C. yamashitae and C. cuneatum, were subjected to karyotype analysis for the first time in a single comprehensive study. The detailed karyotype of C. chorassanicum was also investigated for the first time. A 12 h cold water pretreatment and 13 min 60 degrees C 1 N HCl hydrolysis confirmed a somatic chromosome number of 2n = 16 in all the species. Within species interchromosomal size variation was observed to be quite large in C. arietinum, C. reticulatum and C. echinospermum, but not in the remaining six species. Individual chromosome size ranged from 3.77 microns in C. echinospermum to 1.32 microns in C. arietinum while the haploid genome length ranged from 20.65 microns in C. echinospermum to 14.92 microns in C. cuneatum. Ample rearrangement of chromatin among chromosomes within a species was implied to have played a role in Cicer genome evolution. The nine species were classified in two groups based on karyotypic similarity, with the first group comprising the inter-crossable species C. arietinum, C. reticulatum and C. echinospermum, while the remaining species forming the second group. The first group species are also genetically close to each other as deduced by other morphological, biochemical and DNA based studies. Circumstantial evidence has lead to the speculation that perhaps karyotypic similarity and interspecific crossability are positively related to each other.
Authors:
F Ahmad
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Cytobios     Volume:  101     ISSN:  0011-4529     ISO Abbreviation:  Cytobios     Publication Date:  2000  
Date Detail:
Created Date:  2000-03-24     Completed Date:  2000-03-24     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0207227     Medline TA:  Cytobios     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  37-53     Citation Subset:  IM    
Affiliation:
Department of Botany, Brandon University, Manitoba, Canada.
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MeSH Terms
Descriptor/Qualifier:
Centromere / ultrastructure
Chromosomes / ultrastructure*
DNA, Plant / ultrastructure*
DNA, Satellite / ultrastructure
Diploidy
Fabaceae / genetics*
Heterochromatin / ultrastructure
Karyotyping
Plants, Medicinal*
Species Specificity
Chemical
Reg. No./Substance:
0/DNA, Plant; 0/DNA, Satellite; 0/Heterochromatin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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