SOURCES OF VARIATION IN THE REPRODUCTIVE-PERFORMANCE OF EWES INSEMINATED WITH FROZEN-THAWED RAM SEMEN BY LAPAROSCOPY

被引：30

作者：

EPPLESTON, J ^{[1
]}

MAXWELL, WMC ^{[1
]}

机构：

[1] UNIV NEW S WALES, DEPT ANIM SCI, SYDNEY, NSW 2052, AUSTRALIA

来源：

THERIOGENOLOGY | 1995年 / 43卷 / 04期

关键词：

FROZEN RAM SEMEN; LAPAROSCOPIC INSEMINATION; VARIATION BETWEEN RAMS; FERTILITY; SEMEN ASSESSMENT;

D O I：

10.1016/0093-691X(95)00020-9

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Fertility data from 8 artificial insemination programs, involving more than 5000 ewes and 110 rams in 3 flocks, were analyzed to determine variation due to individual AI program and ram in the reproductive performance of ewes inseminated with frozen-thawed semen by laparoscopy. The semen had been previously frozen by commercial Al centers in either pellets or straws. Both AI program and individual ram affected the proportion of ewes pregnant and the number of fetuses per ewe inseminated, but not the number of fetuses per pregnant ewe. Semen samples from 97 of the rams used were analyzed on a Hamilton Thorn HTM 2000 image analyzer for sperm concentration, percentage of motile and progressively motile spermatozoa, mean progressive velocity, and mean linear index. The correlations between these traits and reproductive performance obtained after insemination were calculated. There was large variation in the quantity and quality of the frozen semen, but only the number of total and motile spermatozoa inseminated per ewe was correlated with fertility (0.25 and 0.26, respectively). Regression analysis showed that none of the traits measured were useful for predicting fertility.

引用

页码：777 / 788

页数：12

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