Section 7
Chapter 6,137

Ploidy of hybrids between grass carp ctenopharyngodon idella and bighead carp hypophthalmichthys nobilis determined by morphological analysis

Beck, M.L.; Biggers, C.J.

Transactions of the American Fisheries Society 112(6): 808-811


ISSN/ISBN: 0002-8487
Accession: 006136228

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Morphological and meristic characters (26) of diploid and triploid hybrids between female grass carp, C. idella, and bighead carp, H. 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 2 sets of chromosomes from the same species.

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