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Allozyme Variation in Accessions of Russian Wildrye
Author(s) -
Wei JunZhi,
Campbell William F.,
Wang Richard R.C.
Publication year - 1996
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1996.0011183x003600030042x
Subject(s) - biology , outcrossing , locus (genetics) , germplasm , allele , genetic diversity , genetic variation , botany , genetics , gene , population , pollen , demography , sociology
Many accessions in a gene bank collection lack adequate genetic characterization. To measure genetic variability in Russian wildrye [ Psathyrostachys juncea (Fisch.) Nevski; 2 n = 2 x = 14; NsNs] for effective management and utilization of germplasm resources, 160 plants representing 11 accessions of this outcrossing species from five countries were analyzed by starch gel electrophoresis. Ten enzymes revealed 14 putative and scorable loci, of which 11 were polymorphic (on average, 66% of loci were polymorphic and 2.6 alleles were found per locus). High levels of isozyme diversity were found mainly within accessions. Fixation of the Idh allele occurred in accessions from Russia, Turkey, and China, whereas polymorphisms at that locus existed in accessions from Mongolia and Iran. Allelic variation at the locus Ak ‐1 was only detected in accessions of Russian origin. A large amount of allelic diversity occurred at most polymorphic loci. Approximately 90% of the allelic diversity existed within accessions. Most of the accessions, except one from Turkey, were genetically similar. Accessions collected from Russia and Mongolia were closely related, except for accession JA 251, which is closely similar to PI 499558, an accession from Xingjiang, China.