The Crossbred Sire: Experimental Results for Swine

Ds, Buchanan

doi:10.2527/jas1987.651117x

Cited by 22 publications

(14 citation statements)

References 18 publications

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“…The lack of paternal heterosis observed in this study seems to be a general fact, as pointed out by recent reviews of Buchanan (1987) and Bidanel (1988). Pani et al (1963) first reported significant grand-maternal effects on litter size at weaning.…”

Section: Introductionsupporting

confidence: 52%

Estimation of crossbreeding parameters between Large White and Meishan porcine breeds

Bidanel¹,

Caritez²,

Legault³

1989

Genet Sel Evol

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Section: Introductionsupporting

confidence: 52%

Estimation of crossbreeding parameters between Large White and Meishan porcine breeds

Bidanel¹,

Caritez²,

Legault³

1989

Genet Sel Evol

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“…It can therefore be concluded that heterosis was not due to earlier sexual maturity of crossbred bucks but was expressed all along the lifetime investigated. In pigs, heterosis for sperm concentration is not a general rule but it was found in most experiments involving young boars [10], in relationship with heterosis on sexual precocity.…”

Section: Discussionmentioning

confidence: 99%

“…The effect of crossbreeding on semen quality traits is not much documented in domestic animal species, except in pig. In his review, Buchanan [10] concluded that crossbred boars generally exhibited larger ejaculate volume, had better semen quality but results concerning sperm concentration varied depending on the study. In cattle, the review concerning the crossbred sire by Thrift and Aaron [28] yielded only one result for heterosis on semen traits, showing heterosis for concentration.…”

Section: Introductionmentioning

confidence: 99%

Evidence for heterosis and maternal effects on rabbit semen characteristics

2002

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-The analysis concerned 546 ejaculates from 65 bucks from two strains ('1601', a duplicate of the 'Verde' strain from INIA-Valencia, Spain-and '2066' from INRA, France) and their two reciprocal crosses, recorded during a 210 day period spanning from August 1996 to February 1997. Two ejaculates were collected from each buck every three weeks and semen traits were recorded every six weeks when the semen was used for insemination. All semen traits were recorded for both ejaculates except concentration, which was recorded only for the ejaculate selected for insemination (the better of the two ejaculates for mass motility). On average, mass motility (scale of Petitjean, 1965 [24]) was 6.75 (standard deviation 1.01), pH 7.28 (0.33), volume 0.62 mL (0.19 mL), percent of motile spermatozoa (PMS) 70.1% (7.5%), concentration 492 × 10 6 spz·mL -1 (142 × 10 6 ), the total number of spermatozoa per ejaculate (TSE) 321 × 10 6 (110 × 10 6 ) and the number of motile sperms per ejaculate (MSE) 231 × 10 6 (83 × 10 6 ). Both strains had similar performances except for the volume of the ejaculate (1601: 0.67 ± 0.04 mL; 2066: 0.52 ± 0.04 mL) and PMS (1601: 69.8 ± 1.4%; 2066: 66.4 ± 1.4%). There was a significant heterosis effect for concentration (37.5% of the parental average), mass motility (6.8%) and PMS (4.1%). Heterosis for the synthetic criteria TSE and MSE amounted to 37.6% and 42.3%, respectively. Strain differences in maternal effects were evidenced: strain 1601 exhibited favourable maternal effects on volume, PMS and mass motility.rabbit / semen / heterosis / maternal effects Résumé -Hétérosis et effets maternels sur les caractéristiques de la semence de lapin. L'analyse concerne 546 éjaculats issus de 65 mâles de deux souches ('1601', issue par duplication de la souche 'Verde'de l'INIA-Valencia, Espagne-et '2066'de l'INRA, France) et de leurs deux croisements réci-proques, contrôlés pendant 210 jours entre août 1996 et février 1997. Les mâles sont prélevés toutes les 3 semaines (2 éjaculats), mais les caractéristiques de la semence sont mesurées toutes les 6 semaines, lors de l'insémination. Tous les caractères sont contrôlés sur les 2 éjaculats sauf la concentration, mesurée uniquement sur l'éjaculat sélectionné pour l'insémination (le meilleur des 2 sur la motilité (0)5 61 28 53 53; e-mail: brun@toulouse.inra.fr massale). En moyenne, la motilité massale (échelle de Petitjean, 1965 [24]) est de 6,75 (écart-type de 1,01), le pH de 7,28 (0,33), le volume de 0,62 mL (0,19 mL), le pourcentage de spermatozoïdes motiles (PMS) de 70,1 % (7,5 %), la concentration 492 × 10 6 spz·mL -1 (142 × 10 6 ), le nombre total de spermatozoïdes par éjaculat (TSE) de 321 × 10 6 (110 × 10 6 ) et le nombre de spermatozoïdes motiles par éjaculat (MSE) de 231 × 10 6 (83 × 10 6 ). Les deux souches ont des performances identiques sauf pour le volume de l'éjaculat (1601 : 0,67 ± 0,04 mL ; 2066 : 0,52 ± 0,04 mL) et PMS (1601 : 69,8 ± 1,4 % ; 2066 : 66,4 ± 1,4 %). On observe un effet d'hétérosis significatif sur la concentration (37,5 % de...

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“…Alternative models to the widely used Dickerson (1969;1973) Kinghorn (1980Kinghorn ( , 1982 compared different epistatic models differing in the type of gene action. However, the most general and satisfactory model, based on Cockerham's (1954) decomposition of genetic variance in a 2-locus model, was proposed by Hill (1982 Buchanan, 1987;or Bidanel, 1988 Sheridan (1981). More recent evidence of epistatic effects has been provided by Kinghorn (1983) for various growth and reproductive traits in mice, by Koch et al (1985) for survival, pregnancy and marbling score in beef cattle, by Hagger (1986; and Fairfull et al (1987) for egg production and by Ericson and Danell (1986), Syrstad (1988) Hayashi et al, 1978;or Gyllensten et al, 1985).…”

Section: Discussionmentioning

confidence: 99%