EFFECTS OF POPULATION SIZE AND SELECTION INTENSITY ON SHORT-TERM RESPONSE TO SELECTION FOR POSTWEANING GAIN IN MICE
نویسندگان
چکیده
منابع مشابه
Effects of population size and selection intensity on correlated responses to selection for postweaning gain in mice.
Correlated responses to selection for postweaning gain in mice were studied to determine the influence of population size and selection intensity. Correlated traits measured were three-, six- and eight-week body weights, litter size, twelve-day litter weight, proportion infertile matings and two indexes of reproductive performance. In general, the results agreed with observations made on direct...
متن کاملPopulation size and selection intensity effects on long-term selection response in mice.
Long-term response to within full-sib family selection for increased postweaning gain was evaluated in lines having different effective population sized (Ne) and selection intensities (i). Line designations were I4(4), I8(2), I16(2), M4(4), M8(2) and M16(2), where I and M indicate selection of the top 50% and 25%, respectively; 4, 8 and 16 represent the number of parental pairs per replicate an...
متن کاملthe effects of keyword and context methods on pronunciation and receptive/ productive vocabulary of low-intermediate iranian efl learners: short-term and long-term memory in focus
از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...
15 صفحه اولEffects of selection for rapid postweaning gain on maturing patterns of fat depots in mice.
Correlated responses to selection for rapid 3 to 6-wk postweaning gain in male mice were estimated for five fat depots weighed at specific degrees of maturity in body weight (37.5, 50.0, 62.5, 75, 87.5 and 100%). Fat pads measured were from regions of the subcutaneous hindlimb, subcutaneous forelimb, epididymides, mesentery and kidneys. At the same degree of maturity, selected mice (M16) were o...
متن کاملSelection for weaning weight and postweaning gain in Hereford cattle. I. Population structure and selection applied.
Single trait selection was practiced in three lines of Hereford cattle derived from a common base population. Selection was practiced on males only within sire families for increased weaning weight (WW) in the WW line (WWL), for postweaning gain (PG) in the PG line (PGL) and at random in the control line (CTL). Females were culled on the basis of age or reproductive failure. Progeny of selected...
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ژورنال
عنوان ژورنال: Genetics
سال: 1973
ISSN: 1943-2631
DOI: 10.1093/genetics/73.3.513