Animal Genetics
Maternal influence on the acceptance of virgin queens introduced into Africanized honey bee (Apis mellifera) colonies
Authors: G. Moretto, J.C.V. Guerra, H. Kalvelage and E. Espindola
The oviposition potential of honey bee queens decreases with age, therefore it is important to replace old queens with younger ones on a periodic basis. However, queen replacement is problematic, especially in Africanized honey bee colonies, since many introduced queens are not accepted, and virgin queens are less easily accep.. Read More»
- Genet. Mol. Res. 3(3):
Macromolecular array patterns of silk gland secretion in social Hymenoptera larvae
Authors: Guilherme Gomes, Elaine C.M. Silva-Zacarin, Fernando J. Zara, Regina L.M. Silva de Moraes and Fl�¡vio H. Caetano
The cocoon, produced by most holometabolous insects, is built with silk that is usually produced by the larval salivary gland. Although this silk has been widely studied in the Lepidoptera, its composition and macromolecular arrangement remains unknown in the Hymenoptera. The macromolecular array patterns of the silk in the la.. Read More»
- Genet. Mol. Res. 3(3):
Age-of-dam adjustment factors for birth and weaning weight records of beef cattle: a review
Authors: Janice M. Rumph, L. Dale Van Vleck
Age-of-dam adjustment factors are used to preadjust birth and weaning weight data for national beef cattle genetic evaluations. Adjustments are used in order to make the means of the different age-of-dam subclasses similar so that a fair comparison of animals can be performed. A review was made of various research studies that.. Read More»
- Genet. Mol. Res. 3(1):
Behavioral genetics of Drosophila ananassae
Authors: Shree Ram Singh, Bashisth N. Singh
Drosophila ananassae has a unique status among Drosophila species because of certain peculiarities in its genetic behavior. The most unusual feature of this species is its relatively high frequency of spontaneous male recombination. The results of studies on non-sexual behavior, such as phototactic responses, eclosion rhythm, .. Read More»
- Genet. Mol. Res. 2(4):
Gene flow between cassava, Manihot esculenta Crantz, and wild relatives
Authors: N.M.A. Nassar
Controlled and natural hybridization between cassava and wild relatives does occur. Barriers within the genus appear to be weak due to recent evolution of the group. All Manihot species examined cytogenetically have a chromosome number of 2n = 36. However, they behave meiotically as diploids. The weak interspecific barriers ha.. Read More»
- Genet. Mol. Res. 2(4):
Is the number of antennal plate organs (sensilla placodea) greater in hygienic than in non-hygienic Africanized honey bees?
Authors: K�¡tia Peres Gramacho, Lionel Segui Gon�§alves, Ant�´nio Carlos Stort, Adriana Backx Noronha
Hygienic behavior is a desirable trait in honey bees (Apis mellifera L.), as hygienic bees quickly remove diseased brood, interrupting the infectious cycle. Hygienic lines of honey bees appear to be more sensitive to the odors of dead and diseased honey bee brood, and Africanized honey bees are generally more hygienic than are.. Read More»
- Genet. Mol. Res. 2(3):
Effects of crude extracts of Agaricus blazei on DNA damage and on rat liver carcinogenesis induced by diethylnitrosamine
Authors: LuÃ?Âs Fernando Barbisan, Clarissa Scolastici, Maristela Miyamoto, Daisy Maria Favero Salvadori, LÃ?ºcia Regina Ribeiro, Augusto Ferreira da Eira, JoÃ?£o Lauro Viana de Camargo
The effects of crude extracts of the mushroom Agaricus blazei Murrill (Agaricaceae) on both DNA damage and placental form glutathione S-transferase (GST-P)-positive liver foci induced by diethylnitrosamine (DEN) were investigated. Six groups of adult male Wistar rats were used. For two weeks, animals of groups 3 to 6 were trea.. Read More»
- Genet. Mol. Res. 2(3):
Relationships of weight and height with age in hybrid Holstein-Friesian/Guzera females
Authors: F.E. Madalena, R.L. Teodoro, A.P. Madureira
Serial data on live weights, height at withers and the weight/height ratio of 263 cows (3 to 9 years old) and 196 heifers (2 to 5 years old) were studied. The animals were of six red and white Holstein-Friesian (HF)/Guzera crosses (1/4, 1/2, 5/8, 3/4, 7/8 and ≥31/32 HF-expected gene fraction). Separate analyses were perform.. Read More»
- Genet. Mol. Res. 2(3):
Comparing data on the reproduction of Varroa destructor
Authors: Maria H. Corr�ªa-Marques, Luis Medina Medina, Stephen J. Martin, D. De Jong
Varroa destructor reproductive success is considered an important character for determining the resistance of honey bees to this mite parasite. However, most of the published data are not comparable due to the different methods of ascertaining and reporting reproduction. A recently published technique that involves reconstruct.. Read More»
- Genet. Mol. Res. 2(1):
Growth hormone mRNA expression in the pituitary of Bos indicus and Bos taurus x Bos indicus crossbred young bulls treated with recombinant bovine somatotropin
Authors: S.M.Z. Di Mauro, L.R. Furlan, M.I.T. Ferro, M. Macari andJ.A. Ferro
The effects of breed and of recombinant bovine somatotropin (rbST) treatment on growth hormone gene expression were studied in young bulls. The experiment was completely randomized in a [2 x 2]-factorial arrangement, using two levels of rbST (0 or 250 mg/animal/14 days), and two breed groups (Nelore and Simmental x Nelore cros.. Read More»
- Genet. Mol. Res. 1(4):