Effect of age, season and sire on semen quality traits in Frieswal breeding bulls

IF 0.2 4区农林科学 Q4 AGRICULTURE, DAIRY & ANIMAL SCIENCE Indian Journal of Animal Sciences Pub Date : 2023-10-06 DOI:10.56093/ijans.v93i10.133063

S TYAGI, T V RAJA, A S SIROHI, N CHAND, S KUMAR, M PANDE, S MAHAJAN, S KUMAR

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Abstract

The present study was undertaken to assess the effect of season of semen collection, age and sire on semen quality of Frieswal breeding bulls. The data on 8113 semen ejaculates of 155 bulls born to 34 Frieswal sires were utilized for the study. The effect of age of bulls on semen volume, sperm concentration (million) per ml and sperm motility (%) in fresh semen (directly after collection) was highly significant. Additionally, it was discovered that the sire effect of bulls on different semen quality parameters and the influence of season on sperm concentration and motility both were statistically significant. Heritability estimates of different semen quality traits studied were moderately high and exceptionally significant. For semen volume, the estimate was found to be 0.336±0.078 while for concentration and pre freezing sperm motility values were 0.296±0.068 and 0.407±0.089, respectively. From the results, it may be concluded that the age and sire of bulls significantly affected the semen volume, sperm concentration and sperm motility in Frieswal bulls. The season of semen collection caused significant variations in sperm concentration and motility but not the semen volume. The semen volume and concentration were superior in ejaculates collected during winter season while the summer season was conducive for increased sperm initial motility. The Frieswal bulls up to 4-5 years are able to produce semen of better quality. The moderately high heritability estimates of semen quality traits provide indication for genetic improvement of the traits through selection.

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年龄、季节和父系对弗里斯瓦尔种牛精液品质性状的影响

本研究旨在评价采精季节、年龄和雄度对弗里斯瓦尔种牛精液质量的影响。这项研究使用了34头弗里斯瓦尔牛的155头公牛的8113次精液数据。公牛的年龄对新鲜精液(直接采集后)的精液量、精子浓度(百万)/ ml和精子活力(%)的影响非常显著。此外，还发现公牛对不同精液质量参数的父系效应以及季节对精子浓度和活力的影响均具有统计学意义。所研究的不同精液质量性状的遗传力估计是中等高的，并且异常显著。精液量的估计值为0.336±0.078，精子浓度和冷冻前精子活力的估计值分别为0.296±0.068和0.407±0.089。由此可见，公牛的年龄和雄度对弗里斯瓦尔公牛的精液量、精子浓度和精子活力有显著影响。收集精液的季节对精子浓度和活力有显著影响，但对精液量没有影响。冬季收集的精液体积和浓度较好，而夏季收集的精液有利于提高精子的初始活力。4-5岁的弗里斯瓦尔公牛能够产生质量更好的精液。精液质量性状具有较高的遗传力，为通过选择对性状进行遗传改良提供了依据。

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来源期刊

Indian Journal of Animal Sciences 农林科学-奶制品与动物科学

CiteScore

0.60

自引率

25.00%

发文量

220

审稿时长

8 months

期刊介绍： Articles published in The Indian Journal of Animal Sciences encompass a broad range of research topics in animal health and production related to cattle, buffalo, sheep, goat, camel, equines, pig, rabbit, yak, mithun, poultry and fisheries. Studies involving wildlife species and laboratory animal species that address fundamental questions about their biology will also be considered for publication. All manuscripts must present some new development and must be original, timely, significant and scientifically excellent. Papers will be rejected if standards of care of, or procedures performed on animals are not up to those expected of humane veterinary scientists. At a minimum, standards must meet the International Guiding Principles for Biomedical Research involving Animals, as issued by the Council for International Organizations of Medical Sciences. (C.I.O.M.S., c/o WHO, CH 1211 Geneva 27, Switzerland). Articles reporting new animal disease must follow GOI directive as given in detail in Guidelines to Authors.