Selection for growth rate and food utilisation (assuming annual genetic gains of 3 and 1.5% respectively) have about the same economic value and account for 94.3% of the annual potential economic savings in the production costs of an integrated broiler enterprise. Selection for more hatching eggs (annual genetic gain of 1.7 eggs) accounts for only 4.2% and selection for fertility, hatchability and reduced mortality have a value of less than 1% each. The introduction of the dwarf gene (dw) has a questionable economic value. Even if growth rate and fertility are not reduced by using dwarf females, the economic importance will equal no more than two generations of selection for growth rate. As egg production increases, the relative economic value of growth rate and food utilisation will increase, while the advantage of using dwarf females will decrease. Both body weight and body fat content (which are correlated with food utilisation) are moderately heritable and if body fat can be measured reliably in live birds, this may aid breeding for economic advantage.
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http://dx.doi.org/10.1080/00071668308416771 | DOI Listing |
J Med Internet Res
January 2025
Department of Radiation Oncology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Background: Primary intracranial germ cell tumors (iGCTs) are highly malignant brain tumors that predominantly occur in children and adolescents, with an incidence rate ranking third among primary brain tumors in East Asia (8%-15%). Due to their insidious onset and impact on critical functional areas of the brain, these tumors often result in irreversible abnormalities in growth and development, as well as cognitive and motor impairments in affected children. Therefore, early diagnosis through advanced screening techniques is vital for improving patient outcomes and quality of life.
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January 2025
Smurfit Institute of Genetics, Trinity College Dublin, Dublin, Ireland.
The origins and prehistory of domestic sheep () are incompletely understood; to address this, we generated data from 118 ancient genomes spanning 12,000 years sampled from across Eurasia. Genomes from Central Türkiye ~8000 BCE are genetically proximal to the domestic origins of sheep but do not fully explain the ancestry of later populations, suggesting a mosaic of wild ancestries. Genomic signatures indicate selection by ancient herders for pigmentation patterns, hornedness, and growth rate.
View Article and Find Full Text PDFPLoS One
January 2025
The Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education, Southwest Forestry University, Yunnan, China.
Pseudosasa subsolida belongs to the Pseudosasa genus within the Poaceae family. Due to its unique flowering cycle and the physiological traits associated with asexual reproduction, acquiring floral material from P. subsolida is particularly challenging.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Clinical Medicine & Surgery, University of Veterinary and Animal Sciences, Lahore, Pakistan.
This study was designed to explore the impact of intrinsic (breed of foal, age of dam, and age of foal at weaning) and extrinsic (season of birth and housing type) factors on the growth and survival of foals in the subtropical conditions of Pakistan. For the growth study, retrospective data analysis of foals (n = 150) born from purebred brood mares of Thoroughbred, Arabs, and Percheron breeds (n1, n2, and n3 = 50 each) was made. Six hundred and twenty-four (n = 624) foals born between 2020 to 2022 were observed for the study of foal survival rate.
View Article and Find Full Text PDFJ Chem Theory Comput
January 2025
Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States.
Algorithmic reaction explorations based on transition state searches can now routinely predict relatively short reaction sequences involving small molecules. However, applying these algorithms to deeper chemical reaction network (CRN) exploration still requires the development of more efficient and accurate exploration policies. Here, an exploration algorithm, which we name yet another kinetic strategy (YAKS), is demonstrated that uses microkinetic simulations of the nascent network to achieve cost-effective, deep network exploration.
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