Breed and heterosis effects on testicular development and endocrine function of puberal boars.
نویسندگان
چکیده
منابع مشابه
Assessment of the effect of heterosis on semen parameters of two-breed crosses of Duroc, Hampshire and Pietrain boars
The study was performed on 4 609 ejaculates obtained from 32 boars, including 14 purebred and 18 two-breed crosses. The ejaculates were collected manually every 4-5 days. The study involved ejaculates collected from each boar from the first day of its insemination use until the day of semen depletion. Each ejaculate was assessed for the following physical parameters: ejaculate volume, sperm con...
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The aim of this study was to evaluate developmental changes in thyroid hormone and other key endocrine hormones/molecular markers produced by testicular cells, in relation to breed differences in proliferation and maturation of Sertoli cells and general testicular morphological development in Meishan (MS) and White Composite (WC) boars. Blood samples and testes were collected on days 60, 75, 90...
متن کاملGrowth, carcass traits, boar odor and testicular and endocrine functions of male pigs fed a progestogen, altrenogest.
Crossbred (Chester White X Yorkshire X Duroc) boars were used to evaluate the effects of feeding a progestogen (altrenogest) on body growth, endocrine function (determined during feeding and after withdrawal of altrenogest), carcass composition, boar odor and testicular function (determined after a 30-d withdrawal from altrenogest). Boars from 18 litters were assigned at 12 wk of age to three t...
متن کاملRelationships among measures of testicular development and endocrine function in boars.
Nine blood samples were taken at 30-min intervals from 36 Landrace X Large White boars at each of eight ages (42, 56, 70, 84, 98, 112, 126 and 140 d). Serum concentrations of luteinizing hormone (LH), follicle-stimulating hormone (FSH), testosterone (T) and estradiol-17 beta (E2) were quantified by radioimmunoassay procedures. The maximum concentration of LH and the age at maximum concentration...
متن کاملP-34: Effects of Chronic Heat Stress on Testicular Structures, Serum Testosterone and Cortisol Concentrations in Developing Lambs
Background: The objective of this study was to investigate the effect of high and moderate summer ambient temperatures on testicular structures and endocrine profile of developing ram lambs. Materials and Methods: Twenty fall-born ramlambswere randomly divided into two groups: animalswere kept outdoor (n=10) under ambient temperature (31-50°C) or maintained indoor (26-32°C) from May to October ...
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عنوان ژورنال:
- Journal of animal science
دوره 57 2 شماره
صفحات -
تاریخ انتشار 1983