Polymorphism and inheritance of serum esterases and β‐globulins in the paradise fish (Macropodus opercularis; Anabantidae)

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Abstract
Electrophoretic variants of serum esterases and .beta.-globulins in 2 sspp. of paradise fish (M. opercularis) were studied. Four esterase loci (Est-1, Est-2, Est-3 and Est-4), a single transferrin (Tf) and another major .beta.-globulin locus (Bg) were identified by segregational analysis. Est-3 seems to be a monomorphic locus. Three alleles of Est-1, 2 of Est-2, 2 of Est-4, 4 of Tf and 2 alleles of Bg were found in the laboratory population. None of these loci were closely linked. Electrophoretic patterns of F1 hybrids confirmed the monomeric structures of each of the studied proteins. Allelic segregation at the Tf and Bg loci was normal in F2 and backcross populations. In crosses of the 2 Macropodus subspecies there were deviations from Mendelian ratios because of missing recombinant esterase phenotypes. Each of these were homozygous Est-2f/f. Est-2f/f may cause lethality in the early phase of development, except in the Est-1c/c, Est-2f/f combination characteristic of the parental subspecies M. o. concolor.