Facteurs génétiques et environnementaux affectant la qualité de la semence de jeunes taureaux Holstein

Diarra, Moussa S.; Paré, Jean-Louis; Roy, Gargi

doi:10.4141/a95-084

Cited by 13 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1989) refer to low to medium heritabilities for semen traits ranging from 0.02 to 0.28. Whereas high heritabilities were observed by Ducrocq and Humblot (1995), Diarra et al. (1997) and Mathevon et al.…”

Section: Discussionmentioning

confidence: 89%

See 1 more Smart Citation

Genetic Parameters for Semen Production Traits in Austrian Dual‐Purpose Simmental Bulls

Gredler

Fuerst²,

Fuerst-Waltl

et al. 2007

Reprod Domestic Animals

View full text Add to dashboard Cite

Genetic parameters were estimated for semen production traits collected in an Austrian AI centre in the years 2000-2004. In total, 12,746 ejaculates from 301 Austrian dual-purpose Simmental (Fleckvieh) AI bulls were examined considering different effects on ejaculate volume, sperm concentration, percentage of viable spermatozoa in the ejaculate, total spermatozoa per ejaculate and motility. The model for genetic parameter estimation included the fixed effects age of bull, collection interval, number of collections on collection day, bull handler, semen collector, year and month of collection, a random additive genetic component and a permanent environmental effect. Correlations between estimated breeding values for semen traits and male fertility from the routine evaluation were calculated. The fertility trait considered in the routine evaluation is non-return rate 90 for the first insemination. All semen production traits were moderately heritable. Heritabilities for volume, concentration, percentage of viable spermatozoa, total number of spermatozoa and motility were 0.18, 0.14, 0.10, 0.22 and 0.04, respectively. Correlations between breeding values for semen quality traits and routinely estimated breeding values for male fertility were low and ranged from 0.08 to 0.17 indicating that semen production traits are rather poor predictors of male fertility.

show abstract

Section: Discussionmentioning

confidence: 89%

“…Genetic correlations obtained in the present study were contrary to literature findings. Diarra et al. (1997) found a genetic correlation of −0.47 between volume and concentration.…”

Section: Discussionmentioning

confidence: 97%

Genetic Parameters for Semen Production Traits in Austrian Dual‐Purpose Simmental Bulls

Gredler

Fuerst²,

Fuerst-Waltl

et al. 2007

Reprod Domestic Animals

View full text Add to dashboard Cite

show abstract

“…Wildt et al 1983;Roelke et al 1993) and inbreeding under domestication, leading to impaired sperm quality (e.g. Diarra et al 1997). More replicated comparisons across inbreeding coefficients in the wild (Gage et al 2006) and captivity (Gomendio et al 2000) show that increasing sperm abnormality is correlated with decreasing measures of heterozygosity.…”

Section: Discussionmentioning

confidence: 99%

Inbreeding depresses sperm competitiveness, but not fertilization or mating success in male Tribolium castaneum

et al. 2010

View full text Add to dashboard Cite

As populations decline to levels where reproduction among close genetic relatives becomes more probable, subsequent increases in homozygous recessive deleterious expression and/or loss of heterozygote advantage can lead to inbreeding depression. Here, we measure how inbreeding across replicate lines of the flour beetle Tribolium castaneum impacts on male reproductive fitness in the absence or presence of male -male competition. Effects on male evolution from mating pattern were removed by enforcing monogamous mating throughout. After inbreeding across eight generations, we found that male fertility in the absence of competition was unaffected. However, we found significant inbreeding depression of sperm competitiveness: non-inbred males won 57 per cent of fertilizations in competition, while inbred equivalents only sired 42 per cent. We also found that the P 2 'offence' role in sperm competition was significantly more depressed under inbreeding than sperm 'defence' (P 1 ). Mating behaviour did not explain these differences, and there was no difference in the viability of offspring sired by inbred or non-inbred males. Sperm length variation was significantly greater in the ejaculates of inbred males. Our results show that male ability to achieve normal fertilization success was not depressed under strong inbreeding, but that inbreeding depression in these traits occurred when conditions of sperm competition were generated.

show abstract

Relationship of age to body weight, scrotal circumference, testicular ultrasonograms, and semen quality in Sahiwal bulls

Ahmad

Naseer

et al. 2010

Trop Anim Health Prod

View full text Add to dashboard Cite

The objective of the present study was to determine the relationship of age to body weight (BW), scrotal circumference (SC), number of pixels of testicular ultrasonograms (NP), and semen quality in Sahiwal bulls. The study was based on 128 Sahiwal bulls of different age groups (from 0 to >100 months of age). Bulls were evaluated for SC, BW, and NP. Semen was evaluated once a week for five consecutive weeks from regularly collected donor bulls (n = 86) ranging in age from 25-30 to >100 months. Ejaculate volume, sperm motility, sperm concentration, sperm morphology, percent live sperms, sperm plasma membrane integrity, and normal acrosome were compared among different age groups. Mean SC and BW increased (P < 0.05) in a curvilinear manner from birth to >100 months of age. Mean NP of testicular ultrasonograms increased (P < 0.05) from 0 to 24 months and then plateaued until >100 months of age. Body weight, SC, and NP were positively correlated with age from birth until >100 months (r = 0.91, 0.87, and 0.40, respectively). Ejaculate volume (5.7 ± 0.2 vs. 4.6 ± 0.09 ml) and sperm concentration (1,281.6 ± 17.7 vs. 1,115.8 ± 55.9 × 10(6)/ml) increased (P < 0.05) in mature bulls compared to younger ones. However, motility (68.6 ± 0.3%), plasma membrane integrity (50.8 ± 1.0%), and normal acrosome (74.8 ± 0.5%) remained insignificant due to age. In six of eight age groups studied, morphological abnormalities were well within the range (18.1 ± 0.3%). In conclusion, the BW, SC, and NP of testicular ultrasonograms, ejaculate volume, and concentration increased with age. Moreover, semen quality is fairly independent of age except volume and concentration in Sahiwal bulls.

show abstract

Facteurs génétiques et environnementaux affectant la qualité de la semence de jeunes taureaux Holstein

Cited by 13 publications

References 17 publications

Genetic Parameters for Semen Production Traits in Austrian Dual‐Purpose Simmental Bulls

Genetic Parameters for Semen Production Traits in Austrian Dual‐Purpose Simmental Bulls

Inbreeding depresses sperm competitiveness, but not fertilization or mating success in male Tribolium castaneum

Relationship of age to body weight, scrotal circumference, testicular ultrasonograms, and semen quality in Sahiwal bulls

Contact Info

Product

Resources

About