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Animal Genetics   Research Article

New genomic resources for the honey bee(Apis mellifera L.): development of a deep-coverage BAC library and a preliminary STC database

Authors: J.P. Tomkins, M. Luo, G.C. Fang1, D. Main1, J.L. Goicoechea,M. Atkins, D.A. Frisch, R.E. Page, E. Guzmán-Novoa5, Y. Yu,G. Hunt6 and R.A. Wing

We have constructed a bacterial artificial chromosome (BAC) library for a European honey bee strain using the cloning enzyme HindIII in order to develop resources for structural genomics research. The library contains 36,864 clones (ninety-six 384-well plates). A random sampling of 247 clones indicated an average insert size o.. Read More»

Genet. Mol. Res. 1(4):
Animal Genetics   Research Article

(Co)variance components, genetic parameters and annual trends for calf weights in a Brahman herd kept on floodable savanna

Authors: Dieter Plasse1, Omar Verde, Jesús Arango, Luis Camaripano, Hugo Fossi, Rafael Romero, Carlos Rodriguez M. and José L. Rumbos

(Co)variance components and genetic parameters were estimated for body weights of an elite Brahman herd under a designed, supervised management and genetic program, including strategic artificial insemination (AI). Restricted maximum likelihood methods were used with a univariate animal model for birth weight (BW) and a bivari.. Read More»

Genet. Mol. Res. 1(4):
Animal Genetics   Research Article

Decreased flight performance and sperm production in drones of the honey bee (Apis mellifera) slightly infested by Varroa destructor mites during pupal development

Authors: Pedro Duay, D. De Jong, Wolf Engels

We developed a bioassay to measure the flying power of drone, in order to determine which drones could reach a drone congregation area. A wind tunnel was used to test unparasitized drones and drones slightly parasitized by one or two mites during pupal development, and counts were made of the number of spermatozoa that they pr.. Read More»

Genet. Mol. Res. 1(3):
Animal Genetics   Research Article

Female remating, sperm competition and sexual selection in Drosophila

Authors: Shree Ram Singh, Bashisth N. Singh and Hugo F. Hoenigsberg

Female remating is fundamental to evolutionary biology as it determines the pattern of sexual selection and sexual conflict. Remating in females is an important component of Drosophila mating systems because it affects sperm usage patterns and sexual selection. Remating is common in females of many species of Drosophila in bot.. Read More»

Genet. Mol. Res. 1(3):
Animal Genetics   Research Article

Varroa-tolerant Italian honey bees introduced from Brazil were not more efficient in defending themselves against the mite Varroa destructor than Carniolan bees in Germany

Authors: M.H. Corrêa-Marques, D. De Jong, P. Rosenkranz andL.S. Gonçalves

In Europe and North America honey bees cannot be kept without chemical treatments against Varroa destructor. Nevertheless, in Brazil an isolated population of Italian honey bees has been kept on an island since 1984 without treatment against this mite. The infestation rates in these colonies have decreased over the years. We l.. Read More»

Genet. Mol. Res. 1(2):
Animal Genetics   Research Article

A technique to obtain fibroblast cells from skin biopsies of living bats (Chiroptera) for cytogenetic studies

Authors: Ricardo Moratelli, Cláudio de Moraes Andrade and Jorge Luís Azevedo de Armada

We developed a procedure to obtain fibroblasts from bat skin. A small fragment of the ear is removed under ether anesthesia. This material is then cut up into small pieces and cultured in standard cell culture media. Very good quality chromosome preparations for cytogenetic studies are obtained in about three weeks. Secondary .. Read More»

Genet. Mol. Res. 1(2):
Animal Genetics   Review Article

Size of beef cows: early ideas, new developments

Authors: Jesus A. Arango and L. Dale Van Vleck

Optimum size for beef cattle is debated among researchers, cattle breeders and producers. Cattle vary widely in body size but optimal size depends on the production system. Selection has placed emphasis on growth, favoring leaner and faster growing cattle. This trend has led to an increase in mature size of cattle that may not.. Read More»

Genet. Mol. Res. 1(1):
Animal Genetics   Research Article

Evaluation of crosses of Holstein, Jersey or Brown Swiss sires x Holstein-Friesian/Gir dams. 2. Female liveweights

Authors: R.L. Teodoro and F.E. Madalena

The liveweights of 100 females sired by Holstein (H), Jersey (J) or Brown Swiss (BS) bulls out of Holstein-Friesian x Gir dams of 1/2 to 3/4 Holstein-Friesian fraction were compared. The animals were kept in a single herd under the same management. The data were analyzed separately for four age categories by least squares tech.. Read More»

Genet. Mol. Res. 1(1):

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