Estimation of heritability and genetic correlation of number of abdominal and caudal vertebrae in masu salmon
Estimation of heritability and genetic correlation of number of abdominal and caudal vertebrae in masu salmon
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DOI：
10.1111/j.1444-2906.2008.01531.x
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发表时间：
2008-04-01
影响因子：
1.9
通讯作者：
Nakajima, Masamichi
中科院分区：
文献类型：
--
作者：
Ando, Daisei;Mano, Shu-ichi;Nakajima, Masamichi
利用10个兄弟姐妹马苏鲑（Oncorhynchus masou masou）家系，对其腹部椎骨（AV）和尾部椎骨（CV）数量的遗传力进行了估计，并计算了这两个性状之间的遗传相关性。分别计算亲本和子代的AV和CV，通过亲本-子代回归分析估计遗传力。在相同水温条件下饲养，亲本椎数类型相同，但不同科间后代的平均椎数存在差异。估计AV和CV的遗传力分别为0.65和0.84。计算出AV数与CV数的遗传相关为-0.92。这些结果表明，即使在相同的环境条件下饲养，AV和CV也受遗传成分的支配，并且总椎体数预计会在一定范围内收敛。在研究马苏鲑鱼的椎体数时，有必要分别分析AV和CV数的变化。
Ten sibship masu salmon Oncorhynchus masou masou families were produced to estimate the heritability of the number of abdominal vertebrae (AV) and caudal vertebrae (CV), and the genetic correlation between the two traits were calculated. The AV and CV of both the parents and their offspring were counted separately, and the heritability was estimated by performing parent-offspring regression analysis. The mean vertebral number of the offspring differed among families although they were reared under identical water temperature conditions and had the same parental vertebral number type in crossbreeding. The heritabilities were estimated as 0.65 for AV and 0.84 for CV. The genetic correlation between the number of AV and CV was calculated as -0.92. These results suggest that AV and CV are governed by genetic components even when the fish are reared under identical environmental conditions, and the total vertebral number is expected to converge within a certain range. It is necessary to analyze separately the variations in the number of AV and CV when investigating the vertebral number in masu salmon.