Precocious Maturation in Male Tiger Pufferfish Takifugu rubripes: Genetics and Endocrinology.
Precocious Maturation in Male Tiger Pufferfish Takifugu rubripes: Genetics and Endocrinology.
复制标题
雄性虎河豚红鳍东方鲀的早熟：遗传学和内分泌学。
DOI：
10.1007/s12562-019-01390-4
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发表时间：
2020
影响因子：
1.9
通讯作者：
Kikuchi K. Hosoya S.
中科院分区：
文献类型：
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作者：
Yoshikawa S.;Chuda H.;Hamasaki M.;Kadomura K.;Yamada T.;Kikuchi K. Hosoya S.
红东方鲀的睾丸在日本是一种美味佳肴，而雄性早熟表型的选择性育种，睾丸发育的早期启动是所希望的。然而，这是未知的，如果早熟性腺发育在这个物种是遗传控制。在这里，我们调查了遗传参与早熟通过使用后代测试从两个培养的人群，包括一个家庭线轶事已知的早熟，和野生人口的公畜。即使在考虑了体重的影响后，来自“早熟”系的后代也始终比来自其他系的后代具有更大的睾丸重量，这表明早熟是真正可遗传的。我们还比较了早熟家系和野生群体雄性后代血浆类固醇激素的时间变化，发现早熟家系在睾丸发育开始前血浆雌二醇-17 β（E2）水平较高。我们的研究结果表明，在虎河豚睾丸早熟的选择性育种是可行的，血浆E2可能是这种表型的一个指标，这将允许表型评估，而不需要牺牲标本。
Testes of the tiger pufferfishTakifugu rubripesare a delicacy in Japan, and selective breeding for a male precocious phenotype, i.e., with early initiation of testes development, is desirable. However, it is unknown if precocious gonad development in this species is under genetic control. Here, we investigated genetic involvement in precociousness by using progeny tests with sires from two cultured populations, including a family line anecdotally known for its precociousness, and a wild population. Progeny derived from the “precocious” line consistently had greater testes weight than that from the other lines, even after accounting for effects of body weight, which indicates that precociousness is truly heritable. We also compared chronological changes in plasma steroid hormones between progenies sired by males from the precocious line and a wild population, and found that the precocious family line had higher levels of plasma estradiol-17β (E2) prior to the initiation of testicular development. Our findings suggest that selective breeding for testes precociousness in the tiger pufferfish is feasible, and that plasma E2 may be an indicator of this phenotype, which would allow for phenotype evaluation without the need to sacrifice specimens.