Embryonic stem (ES) cell-based gene manipulation is an effective method for the generation of mutant animal models in mice and rats. Availability of germline-competent ES cell lines from inbred rat strains would allow for creation of new genetically modified models in the desired genetic background. Fischer344 (F344) males carrying an enhanced green fluorescence protein (EGFP) transgene were us...

Embryo cryopreservation is a valuable tool for maintaining genetic variability and preserving breeds lines, allowing to assess the response selection enabling diffusion. This study aimed evaluate impact of rederivation by embryo vitrification transfer procedures on growth reproductive traits in paternal rabbit line selected average daily gain from weaning (28 days old) fattening (63 old). The r...

The Ural type of the domestic black-and-white mottled breed features high productivity rates, good suitability for industrial milking technology, but duration its productive longevity is 2.4–2.6 lactations only, although in herds there are cows with up to 10 lactations. decline associated particular reproductive qualities. As a result research, it was found that Sealing Trijun Rockit proved be ...

The present study evaluated the carcass and meat quality traits of three groups Japanese quails. These {i.e. selected for 4-week body-weight group (WBS), egg number (EBS), random-bred control (RBC)}, were consecutive generations from a base population 1125 In total, 2700 four-week-old quails lines (225 birds per generation) slaughtered in total four (G0 to G3). effects selection on generations....

We propose a variant of the Bred Vector (BV) algorithm, orginally introduced by Z. Toth and E. Kalnay (Bulletin of the American Meteorological Society 74:2317 2330, 1993) to assess the sensitivity of model outputs to changes in initial conditions for weather forecasting. The new algorithm, which we call the Ensemble Bred Vector or EBV, is based on collective dynamics in an essential way. As suc...

Ewes from lines selected for high and low reproductive rate and a control line bred and selected randomly were endoscopically examined 3 to 5 d after breeding to determine ovulation rates in the fall of 1985, 1986 and 1987. Fertility (ewes lambing per ewe exposed), lambing rate (lambs born per ewe exposed) and litter size (lambs born per ewe lambing) were evaluated at lambing in the spring of e...

The glossy cauliflower PI 234599 has been used in breeding programs as a source of resistance to diamondback moth, Plutella xylostella (L.), and other lepidopterous larvae, but the relationship between insect resistance and glossiness has not been clear. One way to clarify this relationship is to find glossy lines carrying different genes for glossiness and test their resistance to insects. In ...

The ability of sterile males to survive, disperse, find, and mate with wild females is key to the success of sterile insect technique (SIT). The Release of Insects carrying a Dominant Lethal (RIDL) system is a genetics-based SIT strategy for Aedes aegypti. We examine two aspects of insect performance, flight potential (dispersal ability) and teneral energy reserves, by comparing wild-type (WT) ...

The influence of small population size (N) on the genetic variance within and between randomly bred unselected lines, with selfing permitted, is investigated for a model of a quantitative trait determined by linked genes that show dominance within loci but are additive over loci. Formulae for within-line variance include terms in linkage disequilibrum, which occurs by chance in the lines and th...