リンゴガイにおけるロイシンアミノベプチダーゼの連鎖遺伝子座の異型接合度と孵化率との関連性

抄録

In order to examine probable association of hatchability of eggs with the degree of heterozygosi-ty at isozyme coding loci in the cultured populations of the apple snail Pomacea canaliculata, two loci of Lap-2 and Lap-3 linked each other, both coding leucine aminopeptidases, were selected for the progeny test.
A series of observations on frequency distributions of hatchability from each egg lump ex-hibited a two modal distribution, indicating the apparent associations of lower and higher modal values with the degrees of combined heterozygosities of 0.5 and 0.75 at the two loci examined re-spectively. This result suggests an apparent advantage of heterozygotic pairs of the chromosomes in hatchability.