Female rats of ten different inbred strains were tested for their susceptibility to 7, 12-dimethylbenz[a]anthracene (DMBA)-induced mammary adenocarcinogenesis. Five of these strains (OM, NSD, WF, LEWIS, BUFF) were demonstrated to be highly susceptible to DMBA exposure developing greater than 2 continuously growing, macroscopically detectable mammary adenocarcinomas/rat following gastric intubat...

Reproductive success usually declines in the course of the season, which may be a direct effect of breeding time, an effect of quality (individuals with high phenotypic or environmental quality breeding early), or a combination of the two. Being able to distinguish between these possibilities is crucial when trying to understand individual variation in annual routines, for instance when to bree...

In this study, an industry terminal breeding goal was used in a deterministic simulation, using selection index methodology, to predict genetic gain in a beef population modelled on the UK pedigree Limousin, when using genomic selection (GS) and incorporating phenotype information from novel commercial carcass traits. The effect of genotype-environment interaction was investigated by including ...

During the breeding season, male green anoles (Anolis carolinensis) court females by extending a red throat fan called a dewlap. Motoneurons controlling this sexually dimorphic behavior are located in two portions of the brain stem: (a) the vagal portion of nucleus ambiguus (AmbX), and (b) the region containing the glossopharyngeal portion of nucleus ambiguus and the ventral motor nucleus of th...

Prevalence of IBR in breeding bulls of Assam was 15.68%. Bulls between the age group of 3-4 years were having the highest prevalence (9.80%) and lowest (1.96%) above 4 years of age. Breed wise, the prevalence rate was highest in Holstein Friesian (9.80%) and lowest in Jersey Cross breed (1.96%).

Cassava breeding is difficult and, compared with other crops, inefficient. The problems in cassava breeding relate to the length of the breeding cycle, the large genetic load present in the crop, and the heterozygous nature of the parents and progenies evaluated. The production of doubled haploids, through tissue culture techniques, offers interesting advantages. By definition, any process that...

We developed microsatellite markers for genetic structural analyses of Dorcus hopei, a stag beetle species, using next generation sequencing and polymerase chain reaction (PCR)-based genotyping for regional populations. A total of 407,070,351 base pairs of genomic DNA containing >4000 microsatellite loci except AT repeats were sequenced. From 76 loci selected for primer design, 27 were polymorp...

Genetic information obtained from ancestral species of wheat and other registered has brought about critical research, especially in breeding, shown great potential for the development advanced breeding techniques. The purpose this study was to determine correlations between some morphological traits various (Triticum spp.) demonstrate application MARS CHAID algorithms wheat-derived data sets. ...

Genomic selection (GS) is a promising strategy for enhancing genetic gain. We investigated the accuracy of genomic estimated breeding values (GEBV) in four inter-related synthetic populations that underwent several cycles of recurrent selection in an upland rice-breeding program. A total of 343 S2:4 lines extracted from those populations were phenotyped for flowering time, plant height, grain y...

Two / 2 East Friesian (EF), one / 4 EF, one / 8 EF, and several Dorset rams were mated to crossbred ewes from 1993 through 1996. Growth, reproduction, and lactation performance of their progeny were compared. EF-cross lambs had greater birth, weaning, and postweaning weights than Dorset-cross lambs. When lambing at one and two years of age, EF-cross ewes gave birth to and reared more lambs per ...