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雄蚕具有强健好养、饲料效率高、出丝率高、茧丝品质优等特点,选育雄蚕品种实现专养雄蚕是提高茧丝品质和综合效益最为有效的途径。本文综述了从俄罗斯科学院引进家蚕性连锁平衡致死系20年来,我国在家蚕性连锁平衡致死系转育改良方法研究、家蚕性别控制种质资源库构建、实用化雄蚕品种选育、雄蚕品种繁育配套技术开发及雄蚕品种产业化应用等方面取得的主要成果,分析了专养雄蚕产业化过程中存在的问题,提出了进一步加强雄蚕种、茧、丝绸及产品的一体化建设,打造雄蚕丝高端产品与品牌,提高全产业链综合效益的建议。 相似文献
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家蚕是产业化规模最大的经济昆虫 ,常规饲养中均为雌雄混养。由于雄蚕与雌蚕相比具有强健好养 ,食桑省、茧层率和出丝率高 ,丝质优、出丝效益和织物性能好等显著优点 ,系统研究表明专养雄蚕比目前的雌雄蚕各半混养可提高经济效益 30 %以上 ,可以在不增加成本的情况下多产丝 1 0 %以上 ,雄茧单独缫丝 ,可生产 5A级高品位生丝 (比一般的提高 2~ 3个等级 ) ,因此丝茧育希望专养雄蚕。由于雄蛾 (蛹 )独特的功能性 ,利用雄 (蛹 )蛾开发功能性保健品进行产业化开发的企业希望专养雄蚕。由于专养雄蚕具有十分广阔的前景 ,日、俄等国纷纷从不同的… 相似文献
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以常规品种雌为母本,平衡致死系S8,S14雄为欠本,按中×日的形式选配蚕杂交组合,通过对部共28个雄蚕组合的雄蚕率及主要茧丝质性状的配合力测定,选拔出2对优良雄蚕杂交组合夏5×S14,夏S4×S8,它们的雄蚕率达到99%以上,目前已有少量进入农村中试。 相似文献
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1专养雄蚕技术的研究及其应用1.1专养雄蚕的研究历程专养雄蚕技术自1996年从俄罗斯引进基础材料到第1个雄蚕品种秋华×平30通过浙江省品种审定历经8年。回顾近10年研究历程,历经3个阶段:1996 ̄2000年为第一阶段,期间主要是研究引进材料的性别控制可靠性、引进品种系统选纯及与现行优秀的家蚕品种组配成杂交种为主要工作内容,以夏4×平1及夏5×平2为这一阶段的代表品种。通过这个阶段工作,使农村知道了有专养雄蚕这一技术的感性认识。随着雄蚕技术的研究进展,2000 ̄2002年为雄蚕技术研究的第二阶段,期间主要是把成套性平衡致死基因通过精心组… 相似文献
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Male sexual behavior 总被引:2,自引:0,他引:2
E O Price 《Veterinary Clinics of North America: Food Animal Practice》1987,3(2):405-422
This article considers causes of variability in male sexual performance and identifies management techniques that can be used to improve the reproductive success and efficacy of our captive animal populations. 相似文献
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I Dobrinski 《Reproduction in domestic animals》2008,43(S2):288-294
Transplantation of male germ line stem cells from a donor animal to the testes of an infertile recipient was first described in 1994. Donor germ cells colonize the recipient's testis and produce donor-derived sperm, such that the recipient male can distribute the genetic material of the germ cell donor. Germ cell transplantation represents a functional reconstitution assay for male germ line stem cells and as such has vastly increased our ability to study the biology of stem cells in the testis and define phenotypes of infertility. First developed in rodents, the technique has now been used in a number of animal species, including domestic mammals, chicken and fish. There are three major applications for this technology in animals: first, to study fundamental aspects of male germ line stem cell biology and male fertility; second, to preserve the reproductive potential of genetically valuable individuals by male germ cell transplantation within or between species; third, to produce transgenic sperm by genetic manipulation of isolated germ line stem cells and subsequent transplantation. Transgenesis through the male germ line has tremendous potential in species in which embryonic stem cells are not available and somatic cell nuclear transfer has limited success. Therefore, transplantation of male germ cells is a uniquely valuable approach for the study, preservation and manipulation of male fertility in animals. 相似文献
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W. P. Bredal S. I. Thoresen A. Kvellestad K. Lindblad † 《The Journal of small animal practice》1997,38(1):21-24
A seven-month-old male pedigree cat was brought to the Norwegian College of Veterinary Medicine for routine castration. Visual examination of the external genitalia revealed a wide genital cleft with non-fused bilaterally located testicular pouches. A large clitoris, which was penis-like with small penile spines, was seen protruding dorsally from the ventral commissure of the genital cleft. During an exploratory coeliotomy, no intra-abdominal genital structures of müllerian origin were found. The skin pouches on either side of the vulvar cleft were incised and grossly normal testicles were removed. Histology of the removed gonads showed no or very sparse spermatogenesis. The chromosomal sex was determined by karyotyping to be a normal male 38XY. Based on these findings, the diagnosis of male pseudohermaphroditism was made. The aetlology of the condition in this cat was not determined. 相似文献
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<正>同环境和营养管理一样,肉用种公鸡的健康管理同样重要。本文阐述的是如何通过饲养管理、生物安全及家禽福利等措施尽可能控制或预防鸡群疾病,最大程度地发挥鸡群的生产性能。 相似文献