Garwood V A, Diehl K C
U. S. Department of Agriculture, Georgetown, Delaware 19947.
Poult Sci. 1987 Aug;66(8):1264-71. doi: 10.3382/ps.0661264.
A device was developed for the nondestructive measure of body volume by air displacement. Two experiments were performed on Coturnix quail to determine the feasibility of using body density and volume of the live bird as criteria of selection for changing whole body lipid content. In Experiment 1,423 birds were used from three selected lines differing in adult weight. Three measurements of volume were taken on each bird. Repeatability of volume was consistently high for all line-sex subclasses, averaging .75. A phenotypic correlation of .55 was derived for body density and lipid content of the whole carcass. Estimates of heritabilities and genetic relationships for body density, volume and weight, and whole body lipid content were derived in Experiment 2 on 739 birds representing 50 sires and 125 dams of a randombred population. Heritability of volume averaged over full and half-sibs and over sexes was high (.66). The average genetic correlation for volume and lipid content was .44. Heritabilities of density averaged .38 and were highly genetically correlated (.69) with lipid content, which had an average heritability of .35. Body weight was very highly heritable in the population (.82) and correlated genetically with body lipid (.60).
开发了一种通过空气置换对身体体积进行无损测量的设备。对鹌鹑进行了两项实验，以确定将活禽的身体密度和体积作为改变全身脂质含量的选择标准的可行性。在实验1中，使用了来自三个成年体重不同的选定品系的423只鸟。对每只鸟进行了三次体积测量。所有品系-性别亚类的体积重复性一直很高，平均为0.75。得出整个胴体的身体密度与脂质含量的表型相关性为0.55。在实验2中，对代表一个随机交配群体的50个父本和125个母本的739只鸟进行了身体密度、体积和体重以及全身脂质含量的遗传力和遗传关系估计。全同胞和半同胞以及不同性别的体积遗传力平均较高（0.66）。体积与脂质含量的平均遗传相关性为0.44。密度的遗传力平均为0.38，与脂质含量高度遗传相关（0.69），脂质含量的平均遗传力为0.35。该群体中的体重遗传力非常高（0.82），并且与身体脂质存在遗传相关性（0.60）。
