OVULATION RATE, EMBRYO NUMBER AND UTERUS LENGTH IN PUREBRED AND CROSSBRED DUROC, LANDRACE AND LARGE WHITE GILTS

被引：15

作者：

IRGANG, R

SCHEID, IR

WENTZ, I

FAVERO, JA

机构：

[1] National Swine and Poultry Research Center-EMBRAPA Concórdia, Santa Catarina

来源：

LIVESTOCK PRODUCTION SCIENCE | 1993年 / 33卷 / 3-4期

关键词：

CROSSBRED GILTS; PRENATAL TRAITS; HETEROSIS; REPRODUCTIVE EFFICIENCY;

D O I：

10.1016/0301-6226(93)90006-4

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Ovulation and embryo survival rate, number of live and degenerated embryos and uterus length were examined between 28-35 d of gestation in purebred Landrace (LD) and Large White (LW), and in crossbred LDLW, LWLD, Duroc (DR) LD and DRLW gilts. Purebred and crossbred gilts were mated to purebred DR, LD or LW boars. Ovulation rate and live embryo number differed between breed combinations (P < 0.05) but differences in number of degenerated embryos, embryo survival rate and uterus length were not significant. Heterosis estimated from contrasts between crossbred LDLW and LWLD and purebred LD and LW gilts were 17.7% for ovulation rate and 13.3% for number of live embryos. Crossbred gilts from LD dams had higher ovulation rate (P < 0.01) and live embryo number (P < 0.10) than crossbred gilts from LW dams. Differences between white- and Duroc-crossbreds were not significant. Live embryo number was highly correlated with embryo survival and uterus length. Correlation and regression coefficients between live embryo number and ovulation rate were significant in all breed combinations. Crossbred LWLD gilts had the highest ovulation rate and the largest number of live embryos. They had the largest potential to improve reproductive efficiency and were followed by crossbred DRLD and LDLW gilts.

引用

页码：253 / 266

页数：14

共 28 条

[1]

[Anonymous], 1988, SAS STAT USERS GUIDE

[2] GENETIC-IMPLICATIONS OF A SIMULATION-MODEL OF LITTER SIZE IN SWINE BASED ON OVULATION RATE, POTENTIAL EMBRYONIC VIABILITY AND UTERINE CAPACITY .1. GENETIC THEORY [J].

BENNETT, GL ;

LEYMASTER, KA .

JOURNAL OF ANIMAL SCIENCE, 1990, 68 (04) :969-979

[3]

BENNETT GL, 1989, J ANIM SCI, V67, P1230

[4]

Bichard M., 1986, 3rd World Congress on Genetics applied to Livestock Production, Lincoln, Nebraska, USA, July 16-22, 1986. X. Breeding programs for swine, poultry, and fish., P130

[5] THE RELATIONSHIP BETWEEN OVULATION RATE AND EMBRYONIC SURVIVAL IN GILTS [J].

BLICHFELDT, T ;

ALMLID, T .

THERIOGENOLOGY, 1982, 18 (05) :615-620

[6]

BOLLETT G, 1989, GENET SEL EVOL, V21, P93

[7] JUSTIFICATION OF UNILATERAL HYSTERECTOMY-OVARIECTOMY AS A MODEL TO EVALUATE UTERINE CAPACITY IN SWINE [J].

CHRISTENSON, RK ;

LEYMASTER, KA ;

YOUNG, LD .

JOURNAL OF ANIMAL SCIENCE, 1987, 65 (03) :738-744

[8] BREED DIFFERENCES IN UTERINE AND OVARIAN MEASUREMENTS IN GESTATING SWINE [J].

DAVIS, KL ;

ROBISON, OW ;

TOELLE, VD .

JOURNAL OF ANIMAL SCIENCE, 1987, 65 (03) :685-691

[9] GROWTH OF THE REPRODUCTIVE-TRACT OF THE GILT FROM BIRTH TO PUBERTY [J].

DYCK, GW ;

SWIERSTRA, EE .

CANADIAN JOURNAL OF ANIMAL SCIENCE, 1983, 63 (01) :81-87

[10] OVULATION RATE, EMBRYO NUMBER AND UTERUS LENGTH IN PUREBRED AND CROSSBRED DUROC, LANDRACE AND LARGE WHITE GILTS [J].

IRGANG, R ;

SCHEID, IR ;

WENTZ, I ;

FAVERO, JA .

LIVESTOCK PRODUCTION SCIENCE, 1993, 33 (3-4) :253-266

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