RELATIONSHIP BETWEEN GENOTYPE OF SIRE AND DAM, AND PLASMA INSULIN-LIKE GROWTH FACTOR-I CONCENTRATIONS IN CROSSBRED COWS POSTPARTUM

被引：9
|
作者：
SPICER, LJ
TINKER, ED
WETTEMANN, RP
BUCHANAN, DS
机构：
[1] Department of Animal Science, Oklahoma State University, Stillwater, OK
来源：
LIVESTOCK PRODUCTION SCIENCE | 1993年 / 33卷 / 3-4期
关键词：
CROSSBRED COWS; INSULIN-LIKE GROWTH FACTOR-I; BODY CONDITION;
D O I：
10.1016/0301-6226(93)90013-8
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
Five breeds of sires (Hereford, Angus, Simmental, Brown Swiss, Jersey) were crossed with two breeds of dams (Hereford, Angus) to form eight crossbred groups of F1 cows. Five to 20 mature multiparous cows per crossbred group were maintained on grass pasture and bled approximately 85 days post partum during the luteal phase of an oestrous cycle (i.e., day 8-17). Plasma insulin-like growth factor-I (IGF-I) concentrations were determined by radioimmunoassay. Breed of sire had a significant effect on plasma IGF-I concentrations whereas breed of dam had no effect. IGF-I and body condition score were positively correlated across breed groups. In conclusion, plasma concentrations of IGF-I in cattle are influenced by breed/genotype in cattle.
引用
收藏
页码：355 / 360
页数：6
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