Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions

Background: Assessing breeding soundness is important to predict the potential fertility of stallions. Objective: To investigate the association of testis traits, total number of spermatozoa, and testosterone with fertility of Mangalarga Marchador breed stallions. Methods: The traits measured were t...

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Autores principales:	Miguel Alejandro S. Rua, Celia R. Quirino, Aylton Bartholazzi Junior, Wilder Hernando O. Vega, Marcus Antônio P. Barreto, Rosemary Bastos
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2018
Materias:	equine hormone male reproduction testis size Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/9bd6b6fd3b004a818f2b69f6a3ca2481
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spelling	oai:doaj.org-article:9bd6b6fd3b004a818f2b69f6a3ca24812021-12-01T19:43:13ZRelationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions2256-295810.17533/udea.rccp.v31n1a05https://doaj.org/article/9bd6b6fd3b004a818f2b69f6a3ca24812018-03-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/328335https://doaj.org/toc/2256-2958Background: Assessing breeding soundness is important to predict the potential fertility of stallions. Objective: To investigate the association of testis traits, total number of spermatozoa, and testosterone with fertility of Mangalarga Marchador breed stallions. Methods: The traits measured were testicular length, width and height, right and left testicular volume and total testicular volume. We also evaluated the total number of spermatozoa (TNS), serum testosterone concentration and fertility of stallions (by embryo recovery from donor mares) in the breeding and non-breeding seasons during 1 year. Analysis of variance was performed to verify the effects of age category (AC; young/adult) and reproductive season on the traits. Correlations and repeatability of the traits were also calculated. Results: The AC did not influence testis traits (p > 0.05). Reproduction season affected left testicular length, left testicular height, right testicular width and height (p < 0.05). The AC and season affected testis volume (p < 0.05). There were no effects of AC and season on TNS and testosterone (p > 0.05). We observed strong correlations between all testicular measurements and testicular volume (0.53 to 0.75), medium correlation between TNS and testis volume (0.32), and low correlation between testosterone and testis traits (0.20). Repeatability of the characteristics of left and right testis was medium to high (0.22 to 0.78). Embryo recovery rate was 60% and its correlation with TNS was 0.44. Conclusion: Testis size evaluation is recommended over the evaluation of serum testosterone concentration to predict sperm output. Sperm output (TNS) is a good predictor of stallion fertility.Miguel Alejandro S. RuaCelia R. QuirinoAylton Bartholazzi JuniorWilder Hernando O. VegaMarcus Antônio P. BarretoRosemary BastosUniversidad de Antioquiaarticleequinehormonemalereproductiontestis sizeAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 31, Iss 1, Pp 36-44 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	equine hormone male reproduction testis size Animal culture SF1-1100
spellingShingle	equine hormone male reproduction testis size Animal culture SF1-1100 Miguel Alejandro S. Rua Celia R. Quirino Aylton Bartholazzi Junior Wilder Hernando O. Vega Marcus Antônio P. Barreto Rosemary Bastos Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions
description	Background: Assessing breeding soundness is important to predict the potential fertility of stallions. Objective: To investigate the association of testis traits, total number of spermatozoa, and testosterone with fertility of Mangalarga Marchador breed stallions. Methods: The traits measured were testicular length, width and height, right and left testicular volume and total testicular volume. We also evaluated the total number of spermatozoa (TNS), serum testosterone concentration and fertility of stallions (by embryo recovery from donor mares) in the breeding and non-breeding seasons during 1 year. Analysis of variance was performed to verify the effects of age category (AC; young/adult) and reproductive season on the traits. Correlations and repeatability of the traits were also calculated. Results: The AC did not influence testis traits (p > 0.05). Reproduction season affected left testicular length, left testicular height, right testicular width and height (p < 0.05). The AC and season affected testis volume (p < 0.05). There were no effects of AC and season on TNS and testosterone (p > 0.05). We observed strong correlations between all testicular measurements and testicular volume (0.53 to 0.75), medium correlation between TNS and testis volume (0.32), and low correlation between testosterone and testis traits (0.20). Repeatability of the characteristics of left and right testis was medium to high (0.22 to 0.78). Embryo recovery rate was 60% and its correlation with TNS was 0.44. Conclusion: Testis size evaluation is recommended over the evaluation of serum testosterone concentration to predict sperm output. Sperm output (TNS) is a good predictor of stallion fertility.
format	article
author	Miguel Alejandro S. Rua Celia R. Quirino Aylton Bartholazzi Junior Wilder Hernando O. Vega Marcus Antônio P. Barreto Rosemary Bastos
author_facet	Miguel Alejandro S. Rua Celia R. Quirino Aylton Bartholazzi Junior Wilder Hernando O. Vega Marcus Antônio P. Barreto Rosemary Bastos
author_sort	Miguel Alejandro S. Rua
title	Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions
title_short	Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions
title_full	Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions
title_fullStr	Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions
title_full_unstemmed	Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions
title_sort	relationship of serum testosterone, sperm production, and testis traits with fertility of mangalarga marchador stallions
publisher	Universidad de Antioquia
publishDate	2018
url	https://doaj.org/article/9bd6b6fd3b004a818f2b69f6a3ca2481
work_keys_str_mv	AT miguelalejandrosrua relationshipofserumtestosteronespermproductionandtestistraitswithfertilityofmangalargamarchadorstallions AT celiarquirino relationshipofserumtestosteronespermproductionandtestistraitswithfertilityofmangalargamarchadorstallions AT ayltonbartholazzijunior relationshipofserumtestosteronespermproductionandtestistraitswithfertilityofmangalargamarchadorstallions AT wilderhernandoovega relationshipofserumtestosteronespermproductionandtestistraitswithfertilityofmangalargamarchadorstallions AT marcusantoniopbarreto relationshipofserumtestosteronespermproductionandtestistraitswithfertilityofmangalargamarchadorstallions AT rosemarybastos relationshipofserumtestosteronespermproductionandtestistraitswithfertilityofmangalargamarchadorstallions
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Relationship of serum testosterone, sperm production, and testis traits with fertility of Mangalarga Marchador stallions

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