Factors affecting pregnancy rate of embryo transfer in Bos indicus and Bos taurus/Bos indicus cows

被引：6
|
作者：
Montiel, F
Galina, C
Rubio, I
Corro, M
机构：
[1] Univ Veracruzana, Fac Med Vet & Zootecnia, Veracruz 91710, Mexico
[2] Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Mexico City 04510, DF, Mexico
[3] Ctr Ensenanza Invest & Extens Ganado Trop, Martinez De La Torre, Veracruz, Mexico
来源：
JOURNAL OF APPLIED ANIMAL RESEARCH | 2006年 / 29卷 / 02期
关键词：
cryopreservation; embryo transfer; synchronisation of oestrus; tropic; Zebu cattle;
D O I：
10.1080/09712119.2006.9706592
中图分类号：
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号：
0905 ;
摘要：
The present study was conducted to determine the factors affecting pregnancy rate after embryo transfer (ET) in cows from the tropics. Zebu (n=105, Experiment I) andBos taurus/Bos indicus (n=110, Experiment II) potential recipients of embryos were synchronised with a norgestomet implant and received feed supplementation. In both experiments, recipients were divided in two groups: 1) subsequent spontaneous oestrus (SSO) and 2) synchronised oestrus (SO). At ET, recipients of Experiment I (n=50) and II (n=47) were transferred with a single frozen-thawed, in vitro fertilised F1 (Holstein/ Zebu) embryo. Pregnancy rate for Experiment I and II was 16% and 36.2%, respectively. In Experiment I, pregnancy rate was affected by day of transfer (day 7 or day 8, P < 0.05). In Experiment II, pregnancy rate was affected by oestrus type (SSO and SO), feed supplementation (with and without), and body condition score (low and high; P < 0.05).
引用
收藏
页码：149 / 152
页数：4
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