凡纳滨对虾人工授精技术初步研究
【目的】筛选出有效的凡纳滨对虾人工授精方法,为后续的雌核发育诱导研究奠定基础。【方法】以受精率和幼体孵化率为考核指标,探讨外体精卵结合授精法、精荚移植法、精液移植法等不同人工授精技术对凡纳滨对虾繁育效果的影响。【结果】体外精卵结合授精法在各处理组均无幼体成功孵出,但在精子密度为2×107个/L和卵子密度为300枚/L,且在卵排出1 min内完成授精操作时,可获得相对较高的受精率(6.67%)。在精液移植法中,发现精荚在8℃恒温条件下保存3h内进行授精操作,仍可获得一定的受精率和幼体孵化率,超过3h后则无法实现受精;精荚保存温度以8-16℃为宜,保存温度升至25℃时则无法实现受精。3种...
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Published in | 南方农业学报 Vol. 45; no. 3; pp. 489 - 493 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
广西水产科学研究院/广西水产遗传育种与健康养殖重点实验室,南宁,530021
2014
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Subjects | |
Online Access | Get full text |
ISSN | 2095-1191 |
DOI | 10.3969/j.issn.2095-1191.2014.3.489 |
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Summary: | 【目的】筛选出有效的凡纳滨对虾人工授精方法,为后续的雌核发育诱导研究奠定基础。【方法】以受精率和幼体孵化率为考核指标,探讨外体精卵结合授精法、精荚移植法、精液移植法等不同人工授精技术对凡纳滨对虾繁育效果的影响。【结果】体外精卵结合授精法在各处理组均无幼体成功孵出,但在精子密度为2×107个/L和卵子密度为300枚/L,且在卵排出1 min内完成授精操作时,可获得相对较高的受精率(6.67%)。在精液移植法中,发现精荚在8℃恒温条件下保存3h内进行授精操作,仍可获得一定的受精率和幼体孵化率,超过3h后则无法实现受精;精荚保存温度以8-16℃为宜,保存温度升至25℃时则无法实现受精。3种人工授精技术中,以精液移植法的受精率和幼体孵化率最高,分别为52.33%和12.35%,其次是精荚移植法,体外精卵结合授精法的效果最差,无幼体孵出。【结论】精液移植法是凡纳滨对虾最有效的人工授精方法,但精荚保存时间不宜超过3 h,且应在雌虾排卵后1-2 min完成挤精荚和网搓释放精子溶液,同时可添加预先收集浓缩制备好的卵水溶液,以提高凡纳滨对虾的人工授精效率。 |
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Bibliography: | 45-1381/S ZHANG Bin, WEI Pin-yuan, CHEN Xiao-han, XIONG Jian-hua, ZHAO Yong-zhen, YANG Yan-hao, XIE Da-xiang (Guangxi Key Laboratory of Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Academy of Fishery Sciences, Nanning 530021, China) [Objective]Effective artificial insemination methods for Litopenaeus vannamei were screened out to provide references for the subsequent gynogenetic induction research. [Method]With fertility rate and hatching rate as evaluation in-dexes, the effects of fertilization in vitro spermatophore transplantation and semen transplantation on the breeding efficiency of Litopenaeus vannamei were compared.[Result]The results indicated that no larva was hatched from all treatments in this ex-periment, but relatively high fertility rate (6.67%) could be gained under sperm density of 2×107/L and unfertilized egg density of 300 individual/L within unfertilized egg effluxtime time of 1 min. In semen transplantation method, certain fertilization rate and hatching rate could be obta |
ISSN: | 2095-1191 |
DOI: | 10.3969/j.issn.2095-1191.2014.3.489 |