ニジマスの産卵期および卵サイズ形質における雌性発生近交系の作出

DOI 日本農学文献記事索引 Web Site 参考文献33件
  • Kobayashi Toru
    Shiga Prefectural Samegai Trout Farm Department of Fisheries, Faculty of Agriculture, Kinki University
  • Fushiki the Late Shozo
    Shiga Prefectural Samegai Trout Farm Fisheries Laboratory of Kinki University

書誌事項

タイトル別名
  • Production of Gynogenetic Inbred Lines of Rainbow Trout (<I>Oncorhynchus mykiss</I>) and Selection for Early Spawning Time and Large Egg Size
  • Production of gynogenetic inbred lines of rainbow trout Oncorhynchus mykiss and selection for early spawning time and large egg size

この論文をさがす

抄録

We used gynogenetic selection to stabilize genetically reproductive traits, namely, early spawning time and large egg size, in the Samegai breeding stock of rainbow trout (Oncorhynchus mykiss). We examined the distribution of reproductive characteristics, such as ovulation time and egg size, in a summer-spawning group, P, which matured by night-lighting in 1986. Large eggs were selected from females during the early, middle, and end stages of this spawning period and used to produce gynogenetic progeny. After the first gynogenetic generation, 1G, matured in the autumn of 1988, we compared their reproductive characteristics with those of P. Although the size of the 1G egg varied widely, their mean diameter was slightly larger than that of the Samegai stock. From P to 1G, the heritability of egg diameter was 0.164. The 1G progeny that inherited their maternal parent’s large egg size and early spawning time traits were called the early spawning and large egg strain. The second gynogenetic generation, 2G, which was produced from the eggs of this strain, started to ovulate 6 weeks earlier than the peak ovulation period of the Samegai stock. Our results suggested that gynogenetic selection may be faster and more effective than traditional selective breeding.

収録刊行物

  • 水産増殖

    水産増殖 59 (2), 191-198, 2011

    日本水産増殖学会

参考文献 (33)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ