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

页码：149 / 152

页数：4

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