Relationship between scrotal circumference and semen parameters in crossbred bulls

Latif, M. A.; Ahmed, Jalal Uddin; Bhuiyan, Mohammad Musharraf Uddin; Shamsuddin, M.

doi:10.3329/bvet.v26i2.4952

Cited by 14 publications

(7 citation statements)

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“…Baloch et al (2019) recorded 7.10 ml semen volume in Holstein Friesian which is slightly higher than this study. On the other hand, present findings on the semen volume of Sahiwal breeding bulls strongly support the previous research works (Mostari et al, 2004;Latif et al, 2009). The variation in the ejaculate volume might be attributed to the genetic potentiality of the breeding bulls; scrotal circumference, body size and body weight the secretary activities of the sex glands (Leon et al, 1991;Hafez, 1993).…”

Section: Evaluation Of Fresh Semensupporting

confidence: 90%

Frozen semen quality and fertility of imported pure Holstein Friesian and Sahiwal breeding bulls in Bangladesh

Hasan

Islam

Husain

et al. 2020

Asian Australas. J. Biosci. Biotechnol.

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The present study was conducted to evaluate the frozen semen quality in terms of different motility patterns and fertility of imported pure Holstein Friesian and Sahiwal breeding bulls maintained under farming condition of Bangladesh. 100% pure Holstein Friesian and Sahiwal breeding bulls were imported and thereafter reared in the American dairy limited (ADL). Semen samples were collected once a week, processed and frozen in the laboratory of ADL. On the day of collection, semen volume and sperm concentration measured immediately after collection. Different motility patterns of spermatozoa (progressive, fast, slow, local, immotile) were measured by Computer Assisted Semen Analyzer (CASA). Effect of breed was found significant (p<0.05) on semen volume and sperm concentration. The semen volume (ml/ejaculate) and sperm concentration (×106) were found to be 6.13±0.28 and 1664.28±62.41 in Holstein Friesian breeding bulls whereas 5.26±0.17 and 2036.00±43.99 in Sahiwal bulls, respectively. The progressive motility, fast motility, slow motility and local motility were significantly (p<0.05) higher in Holstein Friesian bulls than that of Sahiwal bulls both before and after freezing. Different motility patterns such as progressive, fast, slow, local and immotile motility were found to be 89.22±0.45%, 75.97±0.67%, 9.10±0.36%, 4.25±0.15% and 10.05±0.41% in Holstein Friesian bulls whereas 84.98±0.89%, 65.99±0.92%, 11.88±0.37%, 5.65±0.19% and 15.69±0.54% in Sahiwal breeding bulls, respectively before freezing. On the other hand, after freezing, the progressive, fast, slow, local and immotile spermatozoa were found to be 68.19±0.46%, 53.39±2.01%, 9.21±0.46%, 8.47±0.72% and 26.76±2.01% in Holstein Friesian bulls whereas 56.54±0.25%, 42.52±0.67%, 11.11±0.55%, 13.04±1.24% and 30.45±1.58% in Sahiwal bulls, respectively. Non-return rate was found insignificant between the breeds and it was 64.19% in Holstein Friesian and 64.71% in Sahiwal bulls. In conclusion, frozen semen quality of Holstein Friesian pure breed is better than that of Sahiwal breeding bulls but fertility of both breeds are similar. Therefore, frozen semen of both breeds can be used in the field level for the genetic improvement of cattle. Asian Australas. J. Biosci. Biotechnol. 2020, 5 (1), 33-41

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Section: Evaluation Of Fresh Semensupporting

confidence: 90%

Frozen semen quality and fertility of imported pure Holstein Friesian and Sahiwal breeding bulls in Bangladesh

Hasan

Islam

Husain

et al. 2020

Asian Australas. J. Biosci. Biotechnol.

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“…Scrotal circumference is an easy trait to measure and has moderate to the high magnitude of heritability estimates (Gressler et al, 2000;Fridrich et al, 2005;Eler et al, 2006;Boligon et al, 2010b). Thus, scrotal circumference presents favorable genetic correlations between semen quantity and quality (Latif et al, 2009), age at puberty in females (Santana et al, 2015), and ponderal development (Ortiz Peña et al, 2001;Brito et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle

et al. 2019

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The objectives of this study were to estimate genetic parameters and genetic trends and perform principal component analysis for the following traits: body weight adjusted at 210 days of age (W210), one year (W365), and yearling or 450 days of age (W450); weight gain from birth to weaning or 210 days of age (WGBW), from weaning to 365 days of age (WGW365), and from one year to yearling (WGY); and scrotal circumference adjusted at 365 (SC365) and 450 (SC450) days of age of Guzera beef cattle. Variance components were estimated under a two-trait animal model using the restricted maximum likelihood method. The fixed effects included in the model were birth season, contemporary group, and covariable age of dam at calving as linear and quadratic effects. Heritability estimates ranged from 0.10 (WGY) to 0.41 (W450 and SC450). The studied traits could be used as selection criteria because of their sufficient additive genetic variability to respond to the selection process. However, lower selection efficiency is expected for WGBW and WGY. Genetic trends studied were significant for all traits, except WGY. The W365 and W450 traits belonged to the "Genetic Merit Total" index and responded to selection with favorable genetic gain per year. The traits that were not included in the selection index showed favorable positive genetic correlations attributed to the indirect selection processes. The principal component analysis identified two groups of traits. The first group related to body weight and weight gain and the second related to the scrotal circumference, indicating that selection could be applied to one group of traits within each observed group. The genetic gains were attributed in the same direction for the other traits belonging to the groups. Thus, we recommend selecting animals for W365 based on first group, and SC365 based on second.

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“…A favorable phenotypic association of SC with semen quality has also been demonstrated in different studies (Kealey et al, 2006;Latif et al, 2009;Waldner et al, 2010). However, the main role of SC refers to its favorable genetic correlation with sexual precocity of females, which is very important for Bos indicus that commonly present late puberty in compar-ison with Bos taurus (Eler et al, 2004(Eler et al, , 2006Meirelles et al, 2009).…”

Section: Introductionmentioning

confidence: 89%

Testicular traits as selection criteria for young Nellore bulls

Silva

Pedrosa

Silva

et al. 2011

Journal of Animal Science

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The objective of this study was to evaluate the possible use of biometric testicular traits as selection criteria for young Nellore bulls using Bayesian inference to estimate heritability coefficients and genetic correlations. Multitrait analysis was performed including 17,211 records of scrotal circumference obtained during andrological assessment (SCAND) and 15,313 records of testicular volume and shape. In addition, 50,809 records of scrotal circumference at 18 mo (SC18), used as an anchor trait, were analyzed. The (co)variance components and breeding values were estimated by Gibbs sampling using the Gibbs2F90 program under an animal model that included contemporary groups as fixed effects, age of the animal as a linear covariate, and direct additive genetic effects as random effects. Heritabilities of 0.42, 0.43, 0.31, 0.20, 0.04, 0.16, 0.15, and 0.10 were obtained for SC18, SCAND, testicular volume, testicular shape, minor defects, major defects, total defects, and satisfactory andrological evaluation, respectively. The genetic correlations between SC18 and the other traits were 0.84 (SCAND), 0.75 (testicular shape), 0.44 (testicular volume), -0.23 (minor defects), -0.16 (major defects), -0.24 (total defects), and 0.56 (satisfactory andrological evaluation). Genetic correlations of 0.94 and 0.52 were obtained between SCAND and testicular volume and shape, respectively, and of 0.52 between testicular volume and testicular shape. In addition to favorable genetic parameter estimates, SC18 was found to be the most advantageous testicular trait due to its easy measurement before andrological assessment of the animals, even though the utilization of biometric testicular traits as selection criteria was also found to be possible. In conclusion, SC18 and biometric testicular traits can be adopted as a selection criterion to improve the fertility of young Nellore bulls.

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Relationship between scrotal circumference and semen parameters in crossbred bulls

Cited by 14 publications

References 5 publications

Frozen semen quality and fertility of imported pure Holstein Friesian and Sahiwal breeding bulls in Bangladesh

Frozen semen quality and fertility of imported pure Holstein Friesian and Sahiwal breeding bulls in Bangladesh

Genetic parameters, genetic trends, and principal component analysis for productive and reproductive traits of Guzera beef cattle

Testicular traits as selection criteria for young Nellore bulls

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