Genetics and Plant Breeding

Plant Breeding and Genetics

Genetics: Breeding and Genetics

In broilers, heat stress results in reduced feed intake, digestion inef­ ficiency, impaired metabolism, and death. Our objective was to initiate a study on the effects of heat stress by profiling the transcriptome of a metabolically active organ, the liver, from heat-stressed and non-heat­ stressed broilers. From 21 to 28 d of age, heat-stressed broilers were exposed to daily 7-h cycles of 35°C...

Quantitative Genetics, Genomics, and the Future of Plant Breeding

Quantitative genetics (in its various guises) has been the intellectual cornerstone of plant breeding for close to 100 years. While the roots of Mendelian genetics, and its rediscovery, are firmly in the hands of plant breeders, it was Fisher's (1918) variance decomposition paper that marks the modern foundation for both quantitative genetics and plant breeding. We are now embarking on the age ...

Breeding and Genetics: Crossbreeding

J. Anim. Sci. Vol. 88, E-Suppl. 2/J. Dairy Sci. Vol. 93, E-Suppl. 1/Poult. Sci. Vol. 89, E-Suppl. 1 430 Application of a crossbred model reveals additional genetic variation in reproduction traits of commercial females. S. Bloemhof*1,2, E. F. Knol1, A. Kause2, and I. Misztal3, 1IPG, Institute for Pig Genetics B.V., Beuningen, the Netherlands, 2Animal Breeding and Genomics Centre, Wageningen Uni...

Breeding and Genetics

Using flow cytometry, the ploidy levels of parthenogenetic turkeys were quantified from blastodisc stage to adulthood. Eggs were collected from noninseminated hens of the Beltsville Small White flock, known for their high degree of parthenogenesis, and the blastodermal cells from developing embryos were compared with those of embryos produced by hens inseminated with semen from males of the sam...