Effect of seasonality on quality and fertility of cryopreserved New Zealand white rabbit semen under Egyptian conditions

IF 0.8 4区农林科学 Q3 AGRICULTURE, DAIRY & ANIMAL SCIENCE

World Rabbit Science Pub Date : 2020-09-30 DOI:10.4995/WRS.2020.13627

A. Fadl

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引用次数: 1

Abstract

The present study was designed to investigate the effect of seasonality on the quality and fertility of cryopreserved New Zealand white (NZW) rabbit semen under Egyptian conditions. Semen was collected from fifteen mature rabbit bucks during winter, spring, summer and autumn seasons, diluted in INRA-82 extender and cryopreserved in liquid nitrogen. Following the freezing/thawing process, semen samples were evaluated for semen quality parameters. We also investigated whether seasonality could affect postthaw fertility. The results showed that semen collected and processed during winter, autumn, and spring significantly improved ( P <0.05) sperm motility (56.33, 54.12 and 54.00%, respectively), live sperm (59.24, 58.34 and 57.01%, respectively), functional membrane integrity hypo osmotic swelling test (67.34, 64.59 and 64.31%, respectively), acrosome intactness (79.25, 77.45 and 76.72%, respectively) and sperm with non-fragmented DNA (75.66, 74.02% and 72.53%, respectively) in comparison with semen collected and processed in summer season (30.24, 33.26, 42.51, 51.20 and 40.22%, respectively). The fertility results revealed that conception and kindling rates were significantly higher ( P <0.05) when semen samples were collected and processed in winter (80.00 and 76.00%, respectively) in comparison with those collected and processed in autumn (74.00 and 70.00%, respectively), spring (70.00 and 64.00%, respectively) and summer (30.00 and 20.00%, respectively). In summary, our results show that the quality and fertility of cryopreserved NZW rabbit buck semen depends on the season during which the semen is collected and processed. Moreover, for the best fertility results in doe insemination, semen collected and processed (cryopreserved) in winter season should be used.

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季节对埃及条件下新西兰大白兔精液质量和育性的影响

本研究旨在探讨季节因素对埃及条件下新西兰白兔精液质量和育性的影响。在冬、春、夏、秋4个季节采集15只成年雄兔的精液，用INRA-82扩展剂稀释，液氮冷冻保存。在冷冻/解冻过程中，对精液样本进行精液质量参数评估。我们还调查了季节性因素是否会影响解冻后的生育能力。结果表明，冬、秋、春3个季节采集和处理的精液显著提高了精子活力(分别为56.33、54.12和54.00%)、活精子(分别为59.24、58.34和57.01%)、功能性膜完整性(分别为67.34、64.59和64.31%)、顶体完整性(分别为79.25、77.45和76.72%)和无片段化DNA(分别为75.66、74.02%和72.53%);(30.24%、33.26%、42.51%、51.20%和40.22%)。结果表明，冬季采集和处理的精子受精率(分别为80.00和76.00%)显著高于秋季(分别为74.00和70.00%)、春季(分别为70.00和64.00%)和夏季(分别为30.00和20.00%)。综上所述，我们的研究结果表明，冷冻保存的NZW兔雄鹿精液的质量和生育能力取决于精液采集和加工的季节。此外，为了获得最佳的受精效果，应使用冬季收集和处理(冷冻保存)的精液。

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来源期刊

World Rabbit Science 农林科学-奶制品与动物科学

CiteScore

1.70

自引率

25.00%

发文量

审稿时长

>36 weeks

期刊介绍： World Rabbit Science is the official journal of the World Rabbit Science Association (WRSA). One of the main objectives of the WRSA is to encourage communication and collaboration among individuals and organisations associated with rabbit production and rabbit science in general. Subject areas include breeding, genetics, production, management, environment, health, nutrition, physiology, reproduction, behaviour, welfare, immunology, molecular biology, metabolism, processing and products. World Rabbit Science is the only international peer-reviewed journal included in the ISI Thomson list dedicated to publish original research in the field of rabbit science. Papers or reviews of the literature submitted to World Rabbit Science must not have been published previously in an international refereed scientific journal. Previous presentations at a scientific meeting, field day reports or similar documents can be published in World Rabbit Science, but they will be also subjected to the peer-review process. World Rabbit Science will publish papers of international relevance including original research articles, descriptions of novel techniques, contemporaryreviews and meta-analyses. Short communications will only accepted in special cases where, in the Editor''s judgement, the contents are exceptionally exciting, novel or timely. Proceedings of rabbit scientific meetings and conference reports will be considered for special issues. World Rabbit Science is published in English four times a year in a single volume. Authors may publish in World Rabbit Science regardless of the membership in the World Rabbit Science Association, even if joining the WRSA is encouraged. Views expressed in papers published in World Rabbit Science represent the opinion of the author(s) and do not necessarily reflect the official policy of the WRSA or the Editor-in-Chief.