The Normal Development of the Testes in the White Plymouth Rock

Kumaran, Jyothi; Turner, C. W.

doi:10.3382/ps.0280511

Cited by 35 publications

(14 citation statements)

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“…Seminiferous tubules comprise the main compartment of testis parenchyma, and in some hybrid birds this component represented more than 80%, which is comparable to 83% found in the testis of sexually active cocks in White Plymouth Rocks (Kumaran and Turner, 1949) and in other domestic fowl (de Reviers, 1971).…”

Section: Discussionmentioning

confidence: 94%

Histological Observations in Testes of Hybrids of Gallus Gallus x Phasianuns Colchicus

Castillo

Cossato

Pirone

et al. 2012

Avian Biology Research

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This study performed a histological and morphometric investigation of testes in Gallus gallus x Phasianus colchicus hybrids during the seasonal reproductive period of pheasants. The trial was conducted on seven 4-year old birds originated from the mating between New Hampshire cocks and female common pheasants. After sacrifice, testes were removed, macroscopically evaluated and routinely processed for light microscopic investigations. Mean testis weight was 0.85 g and a great variability was observed between birds. Only one bird out of seven developed heavier testes each weighing almost 3 g. Relative volume occupied by seminiferous tubules was 75%. Approximately 39 m of seminiferous tubules were found per testis and around 96 m per gram of testis. A high correlation was observed between the number of Sertoli cells and germ cells with testis weight. Seminiferous epithelium comprised Sertoli cells and germ cells at different stages of development. Three birds presented tubules with a multilayered epithelium and germ cells developed until the stage of round spermatids. Surprisingly, one bird presented some elongated forms as well

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Section: Discussionmentioning

confidence: 94%

Histological Observations in Testes of Hybrids of Gallus Gallus x Phasianuns Colchicus

Castillo

Cossato

Pirone

et al. 2012

Avian Biology Research

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“…Quantitative studies on the impact of various photoperiods on the stereology and morphology of cells forming the seminiferous epithelium (SE) in domestic avian species are scarce; they are limited to works by Kumaran and Turner [1] and de Reviers [2] in fowl, Clulow and Jones [3] in Japanese quail, Marchand and Gomot [4] in ducks, and Brillard [5] in guinea-fowl. Cellular associations between specific stages of spermatogenesis have been described; they have facilitated quantitative studies of mammalian spermatogenesis [6,7].…”

Section: Introductionmentioning

confidence: 99%

Spermatogenesis in the turkey (Meleagris gallopavo): Quantitative approach in immature and adult males subjected to various photoperiods

Noirault

Brillard

Bakst³

2006

Theriogenology

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The objectives of this study were to identify and quantitate the germ cell populations of the testes in sexually mature male turkeys (Trial 1), determine the duration of meiosis based on BrdU labeling and stereological analyses (Trial 2), and examine the impact of various photoperiods on germinal and somatic cell populations in immature and adult males (Trial 3). In Trial 1, both testes within a male had similar stereological components (P > 0.05) for all parameters analyzed. In Trial 2, the duration of Type-1 spermatocytes and round spermatids in turkeys lasted 4.5 AE 0.5 and 2.0 AE 0.5 days, respectively. In Trial 3, the short photoperiod (7L:17D) delayed testicular growth (in the stereological parameters analyzed). In contrast, the effect of a moderately short photoperiod (10.5L:13.5D) was comparable to the effect of a long (14L:10D) or increasing photoperiod (7L:17D to 14L:10D) on the stereological parameters examined. With the exception of the short photoperiod, all other photoperiods used in this study induced comparable early testicular maturation, with maximum testis www.journals.elsevierhealth.com/periodicals/the Theriogenology 65 (2006) 845-859Abbreviations: El, elongated spermatids; Fwt, testes fragment weight; MR, meiotic ratio; Ø, seminiferous tubule diameter; u, mean lifespan; nSert, Sertoli cell counts; nSpcI, primary spermatocyte counts; nSpdR, round spermatid counts; NSert, total number of Sertoli cells per testes; NSpcI, total number of Type-I spermatocytes per testes; NSpdR, total number of round spermatids per testes; Sert, Sertoli cells; SE, seminiferous epithelium; Spg, spermatogonia; Spc I, Type-I spermatocytes; SpcII, Type-II spermatocytes; SpdR, round spermatids; ST, seminiferous tubule; Tspz, testicular spermatozoa; TSP, testicular sperm production; V r , relative volume * Corresponding author. Tel.: +33 2 47 42 7645; fax: +33 2 47 42 7778.E-mail address: brillard@tours.inra.fr (J.-P. Brillard). This article is a U.S. government work, and is not subject to copyright in the United States.weight at 29-35 weeks of age. As the males got older, there was a progressive, linear decline in testis weight through 60 weeks, at which time there were no significant differences among photoperiods. In conclusion, the duration of meiosis in the turkey was similar to that observed in the fowl and guineafowl. The existence of a threshold of photosensitivity to gonad stimulation in male turkeys is suggested to be between 7.0 and 10.5 h of light. #

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“…Working with a domesticated species, the White Plymouth Rock chicken, Kumaran and Turner (1949) described the histologic changes in the testes as the males developed sexually. In wild birds, particularly the passerines, the annual gonadal cycle and its relation to migration and reproduction has been the subject of numerous investigations.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Seasonal Reproductive Ability of Male Domestic Turkeys as Observed under Two Ambient Temperatures ,

Law

Kosin

1958

Poultry Science

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The Normal Development of the Testes in the White Plymouth Rock

Cited by 35 publications

References 10 publications

Histological Observations in Testes of Hybrids of Gallus Gallus x Phasianuns Colchicus

Histological Observations in Testes of Hybrids of Gallus Gallus x Phasianuns Colchicus

Spermatogenesis in the turkey (Meleagris gallopavo): Quantitative approach in immature and adult males subjected to various photoperiods

Seasonal Reproductive Ability of Male Domestic Turkeys as Observed under Two Ambient Temperatures ,

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