Quijandria B, Zaldivar M, Robison O W
J Anim Sci. 1983 Apr;56(4):820-8. doi: 10.2527/jas1983.564820x.
Four generations of selection for litter size, 13-wk weight and an index combining litter size and 13-wk body weight were conducted in a guinea pig population formed by intercrossing several local lines from different areas of Peru. A random selection control line was maintained also. Responses in the selected traits per generation were .069 +/- .069, 19.1 g +/- 16.2 and 2.5 +/- 20.3 for the litter size, 13-wk weight and index lines, respectively. Realized heritabilities were estimated by two methods. Estimates obtained from regression of response on cumulative selection differentials were .01 +/- .45 for litter size, .27 +2- .06 for 13-wk weight and -.09 +/- .13 for index values. Estimates from weighted multiple regression procedures were .07 +/- .01, .18 +/- .004 and .04 +/- .01 for litter size, 13-wk weight and index, respectively.
在由秘鲁不同地区的几个本地品系杂交形成的豚鼠群体中，对产仔数、13周龄体重以及结合产仔数和13周龄体重的一个指数进行了四代选择。同时还维持了一个随机选择的对照品系。产仔数品系、13周龄体重品系和指数品系每代所选性状的反应分别为0.069±0.069、19.1克±16.2和2.5±20.3。通过两种方法估计了实现遗传力。从反应对累积选择差的回归得到的估计值，产仔数为0.01±0.45，13周龄体重为0.27±0.06，指数值为-0.09±0.13。加权多元回归程序得到的估计值，产仔数为0.07±0.01，13周龄体重为0.18±0.004，指数为0.04±0.01。
