Age

Effects of sex and age on chicken TBC1D1 gene mRNA expression

Y. D. Peng, Xu, H. Y., Ye, F., Lan, X., Peng, X., Rustempašić, A., Yin, H. D., Zhao, X. L., Liu, Y. P., Zhu, Q., and Wang, Y., Effects of sex and age on chicken TBC1D1 gene mRNA expression, vol. 14, pp. 7704-7714, 2015.

The objective of this study was to investigate the effects of sex and slaughter age of chickens on fatty acid composition and TBC1D1 gene expression in 4 different tissues: breast muscle, thigh muscle, abdominal fat, and subcutaneous fat. Sixty Erlang mountainous chickens (hybrid SD02 x SD03) were raised under the same conditions and slaughtered at 8, 10, and 13 weeks of age.

Deposition rule of yolk cholesterol in two different breeds of laying hens

P. K. Yang, Tian, Y. D., Sun, G. R., Jiang, R. R., Han, R. L., and Kang, X. T., Deposition rule of yolk cholesterol in two different breeds of laying hens, vol. 12, pp. 5786-5792, 2013.

The objective of this study was to investigate the deposition rule of yolk cholesterol in Lushi Green-shelled and Silky Fowl layers. A total of 90 layers of each breed were selected at an age of 15 to 51 weeks. Productive performance was recorded on a weekly basis, whereas yolk cholesterol was determined at 4-week intervals from 21 to 51 weeks of age. The average yolk cholesterol content of Silky Fowl layers during the laying period was higher than that of Lushi Green-shelled layers (58.16 and 49.67%, P > 0.05).

Age-related pyrethroid resistance is not a function of P450 gene expression in the major African malaria vector, Anopheles funestus (Diptera: Culicidae)

R. N. Christian, Matambo, T. S., Spillings, B. L., Brooke, B. D., Coetzee, M., and Koekemoer, L. L., Age-related pyrethroid resistance is not a function of P450 gene expression in the major African malaria vector, Anopheles funestus (Diptera: Culicidae), vol. 10, pp. 3220-3229, 2011.

Anopheles funestus is a major vector of malaria in most of the African region. Resistance to pyrethroid and carbamate insecticides has been recorded in populations of this species in South Africa and Mozambique. The P450 gene, CYP6P9, has been shown to be highly transcribed in a permethrin (pyrethroid)-resistant laboratory strain, FUMOZ-R, originating from southern Mozambique. We examined the relationship between pyrethroid resistance and gene transcription levels of two closely related genes, CYP6P9 and CYP6P13, in FUMOZ-R.

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