PREMISE Inbreeding depression, or the reduction in fitness of progeny with related parents, has potential to adversely affect long-term viability both wild and captive plant populations. Silphium integrifolium, a prairie native central United States, been identified as candidate for domestication perennial oilseed crop. Little is known about inbreeding depression this species, but it expected b...

Carcass EPDs are becoming common in this era when more economically important traits are being added to national cattle evaluation programs. Traditionally, carcass traits were evaluated solely using progeny tests. One limitation to progeny testing is, of course, cost. Also, for bulls to be evaluated in such a program, he must produce progeny on which carcass data are collected. This is a proces...

Over the last twoto three-decade period, the beef industry has made great use of genetic selection tools to improve economically important traits. Much of that improvement is due to the implementation and use of expected progeny differences (EPD). Since beef producers are paid for their animals on the basis of weight, or in some cases by the merit of animal carcasses, most EPD reported in breed...

Postweaning records were collected on 7,428 bulls completing gain tests from 1981 to 1994 at Oklahoma BEEF, Inc. Central Bull Test Station. A total of 3085 bulls (A=806 Angus, B=497 Brangus, H=533 Hereford, P=601 Polled Hereford, C=399 Charolais and L=249 Limousin) completed the 140-day test from 1981 to 1986. From 1987 to 1994, performance data were collected on 4343 bulls (A=2384 Angus, B=487...

Validation of economic indexes under a controlled experimental environment, can aid in their acceptance and use as breeding tools to increase herd profitability. The objective of this study was to compare intake, growth and carcass traits in bull and steer progeny of high and low ranking sires, for genetic merit in an economic index. The Beef Carcass Index (BCI; expressed in euro (€) and based ...

in order to apply suitable methods for sugar beet seed sowing and determine the relation between yield and growth parameters in saline soils, two salt tolerant progeny lines were sown by five methods for two years (1995 and 1996) using a split plot design. growth parameters such as leaf area index, crop growth rate, total dry weight and relative growth rat were analysed. ph and ec of the soil a...

the effect of genotype, sex and hatch on carcass traits and physical characteristics of eggs was investigated in the japanese quail. two strains of japanese quails including the white (p1) and wild (p2) genotypes were chosen as the parental generation and crossed reciprocally (10 single-pair mating) to create the f1 progeny. the f1 birds (27 males and 81 females) were mated randomly to produce ...

The pinewood nematode Bursaphelenchus xylophilus (B. xylophilus) is responsible for a devastating disease of pine forests. Its pathogenicity closely related to the numbers individual B. xylophilus. ratio female male (sex ratio) key understanding population change in this species. sex varies widely, but it unclear how affected by environmental changes. ratios nematodes, isolated from different s...

Carcass and Warner-Bratzler shear force (WBSF) data from strip loin steaks were obtained from 7,179 progeny of Angus, Brahman, Brangus, Charolais, Gelbvieh, Hereford, Limousin, Maine-Anjou, Red Angus, Salers, Shorthorn, Simbrah, Simmental, and South Devon sires. Trained sensory panel (TSP) evaluations were obtained on 2,320 steaks sampled from contemporary groups of progeny from one to five sir...

Inter-specific hybridization and backcrossing commonly occur in plants. The use of progeny generated from inter-specific hybridization and backcrossing has been developed as a novel model system to explore gene expression divergence. The present study investigated the analysis of gene expression and miRNA regulation in backcrossed introgression lines constructed from cultivated and wild rice. H...