USGS Science⌕ Search

Geology topics

M.L. Beck

Publications and source records attributed to M.L. Beck.

2 recordsLinked to original sources

Electrophoretic analysis of protein systems of Ctenopharyngodon idella (Val.), Hyophthalmichthys nobilis (Rich.) and the F1 triploid hybrid

Electrophoretic analysis was performed on eight protein systems (lactate dehydrogenase, liver esterases, superoxide dismutase, haemoglobin, isocitrate dehydrogenase, glucose-6-phosphate dehydrogenase, 6-phosphogIuconate dehydrogenase, transferrin) in Ctenopharyngodon idella, Hypophthalmichthys nobilis , and their F 1 triploid hybrid. The data demonstrated codominant Mendelian inheritance at individual loci for each protein system. Transferrin and superoxide dismutase were the only proteins found to be polymorphic in either parental species. Both parental alleles were present and functional at each enzyme locus examined in the F 1 triploid hybrid.

Journal of Fish Biology↗

Karyological analysis of Ctenopharyngodon idella, Aristichthys nobilis, and their F1 hybrid

Ctenopharyngodon idella (grass carp) and Aristichthys nobilis (bighead carp) have a diploid chromosome number of 48 with no acrocentric chromosomes. The hybrid of these species is triploid with 72 chromosomes. The frequencies of metacentric and submetacentric chromosomes suggest that the hybrid receives two maternal and one paternal set of chromosomes.

Transactions of the American Fisheries Society↗