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Ploidy of Hybrids between Grass Carp and Bighead Carp Determined by Morphological Analysis
Author(s) -
Beck Melvin L.,
Biggers Charles J.
Publication year - 1983
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1983)112<808:pohbgc>2.0.co;2
Subject(s) - hybrid , biology , ploidy , meristics , discriminant function analysis , grass carp , bighead carp , hypophthalmichthys , zoology , botany , genetics , carp , fishery , silver carp , fish <actinopterygii> , gene , statistics , mathematics
Twenty‐six morphological and meristic characters of diploid and triploid hybrids between female grass carp, Ctenopharyngodon idella and bighead carp Hypophthalmichthys nobilis were analyzed by discriminant‐function analysis. Twelve characters were useful in distinguishing between diploids and triploids. When these 12 characters were subjected to discriminant‐function analysis, 97% of the hybrids were correctly classified as either diploid or triploid. No single character allowed diploids to be distinguished from triploids. Triploid hybrids had fewer morphological abnormalities than did diploid hybrids, possibly because triploid hybrids had two sets of chromosomes from the same species. Received March 5, 1983 Accepted August 8, 1983