【摘要】 <正> 蚕种生产过程中,蛹期的保护温度与产卵质量的关系极为密切。过去国内外学者从保护目的温度与产不良卵,不受精卵数量方面研究,至于高温对蛹期的雌雄生殖细胞的影响与产卵质量方面的研究甚少。因此,本试验进一步研究了不同蛹期接触高温后,引起生殖细胞的变化与产卵质量的关系,并调查其内外生殖器官是否正常,俾能更确切地了解蚕种生产过程中雌雄蛹不宜接触高温的发育阶段及其原因。 广东6—9月,自然温度常超过32℃,特别是7月有时超过36℃。因此,在蚕种生产过程中,经常因遇到高温的冲击而影响蚕种的质量。所以,采用35℃为接触温度。更多还原

【Abstract】 This experiment is concerned with the further research in different pupal stages, how various high temperatures would induce the changes of germ cells, and the eggs produced. At the initial stage of the male pupae, ( one to two days after pupation ) , they were very sensitive to high temperature; after being kept under 3513 for 36 hours, or more the sperm bundle would shorten, and the tail would enlarge clearly; thus it would result male sterile, and the percentage of infertile eggs would rapidly increase. In case the pupae were kept under 3513 for 60 hours, the percentage of infertile eggs would reach as high as 97.3%. However, the female pupae were sensible to high temperature in their late stage (6-8 days after pupation); after being kept under 35C for 36 hours, the development of the cells would be retared, resulting the shortage of eggs, piling up of them or changing in their position inside the oviduct, the percentage of infertile eggs even higher than that induced to the male pupae under high tempera-ure at the initial stage. In addition, if the male and female pupae were both influenced by high temperature, the total amount of eggs and fertile eggs produced in the moth batches would apparently decrease, and the index of percentage of infertile eggs would be high.更多还原