LONG-TERM SELECTION RESPONSE FOR 12-DAY LITTER WEIGHT IN MICE
نویسندگان
چکیده
منابع مشابه
Alternative methods of selection for litter size in mice: III. Response to 21 generations of selection.
Alternative methods of selection to increase litter size in mice have been practiced for 21 generations followed by six generations of relaxed selection. Three replicates were used with four selection criteria: index of components (IX:I = 1.21 x total ovulation rate + 9.05 x ova success), uterine capacity (UT), litter size (LS), and an unselected control (LC). In IX, ovulation rate and ova succ...
متن کاملBehavioural differences in non-reproductive adult females in a long-term selection experiment for litter size in mice
In a previous study, it has been shown that adult, non-reproductive female mice from a line Ž . Ž . selected for high litter size at birth S-line have higher residual feed intake RFI than females of Ž . a non-selected control line C-line . Several studies have indicated that a higher RFI is related to a higher activity level. Differences in activity may suggest underlying differences in coping ...
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 کاملEffect of selection for litter size and body weight on hormone-induced ovulation rate in mice.
Genetic differences in natural vs hormone-induced ovulation rates were compared in immature female mice from five lines that had undergone long-term single-trait and antagonistic index selection for litter size and(or) 6-wk BW. Lines used were control (K); high litter size (L+); high BW (W+); low litter size and high BW (L-W+); and high litter size and low BW (L+W-). Natural ovulation rate at a...
متن کاملSingle-trait and antagonistic index selection for litter size and body weight in mice.
INDIVIDUAL SELECTION BASED ON FEMALE PERFORMANCE ONLY WAS CONDUCTED IN FOUR LINES OF MICE: L(+) for increased litter size, W(+) for increased 6-week body weight, L(-)W(+) for a selection index aimed at decreasing litter size and increasing 6-week body weight and L(+)W(-) for a selection index aimed at increasing litter size and decreasing 6-week body weight. A fifth line (K) served as an unsele...
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ژورنال
عنوان ژورنال: Genetics
سال: 1972
ISSN: 1943-2631
DOI: 10.1093/genetics/72.1.129