نتایج جستجو برای: genetic trends
تعداد نتایج: 760986 فیلتر نتایج به سال:
Predicted transmitting abilities (PTA) for somatic cell scores (SCS) have been calculated and released to the US dairy industry since 1994. Phenotypically, SCS appear to be decreasing on a population basis, but genetic trends are small. Genetic trends among bulls sampled by artificialinsemination (AI) organizations also are small. Correlations of sire PTA for SCS and PTA for yield traits were n...
age-related macular degeneration (armd) is a major cause of central blindness among working aged adults across the world. systematic research planning on any subject, including armd is in need of solid data regarding previous efforts in this field and to identify the gaps in the research. this study aimed to elucidate the most important trends, directions, and gap in this subject. the data extr...
Genetic parameters for length of productive life given the opportunity (LPL/O), measured as days between first calving and disposal conditioned on one of six opportunity groups, L1 through L6 (e.g., L2 is length of productive life in days given the opportunity to live 2 yr after first calving), and lifetime production (LP), measured as the number of calves born (NB), number of calves weaned (NW...
Data of chickens from a broiler-breeding program were collected and used to determine the genetic trends of absolute and relative abdominal fat content. The genetic trends were estimated by the regression of trait genetic value averages on hatch-years. Genetic values from 32,485 individuals were used for regression analysis. The genetic trend estimate for absolute abdominal fat content was +0.3...
A total of 1256 records associated with body weight and Cashmere at different ages (birth and 3 and 9 months) obtained from 754 Cashmere goats were used to estimate the genetic parameters in southern Khorasan province during 2000- 2003. A set of univariate animal models including additive and maternal genetic effects and maternal permanent environmental effects as well as the fixed effects of y...
this study was carried out to investigate the effect of selection on the reduction of fat-tail size in lori-bakhtiari lambs. the study lasted for five years at the development and breeding center of lori-bakhtiari sheep station. estimation of fat-tail weight, using external fat-tail dimensions was obtained from regression procedure at 6 month age. soft tissue depth at the point 12 cm from the m...
celiac disease is a chronic, systemic and autoimmune disorder of gastrointestinal track that involves approximately 1% of individuals of all ages throughout the world. the collaboration of environmental factor such as gluten proteins and genetic factors, notably hla-dq2 and/or hla-dq8 trigger the disease. gluten-free diet is the simply and merely safe and proficient existing treatment. this art...
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