Evolutionary transitions require the organization of genetic variation at two (or more) levels of selection so that fitness heritability may emerge at the new level. In this article, we consider the consequences for fitness variation and heritability of two of the main modes of reproduction used in multicellular organisms: vegetative reproduction and single-cell reproduction. We study a model w...

Average daily gain between birth and 30 d of age of 42,644 lambs of Swiss Black-Brown Mountain Sheep were used in this analysis. The influence of amount of pedigree information on computing time and on REML estimates of population parameters was investigated on a subset of 7,848 lambs. If all available pedigree information was used, 89.4% of the lambs had at least four complete generations of k...

Assessing the impact of the social environment on health and disease is challenging. As social effects are in part determined by the genetic makeup of social partners, they can be studied from associations between genotypes of one individual and phenotype of another (social genetic effects, SGE, also called indirect genetic effects). For the first time we quantified the contribution of SGE to m...

Weight records of Brazilian Nelore cattle, from birth to 630 d of age, recorded every 3 mo, were analyzed using random regression models. Independent variables were Legendre polynomials of age at recording. The model of analysis included contemporary groups as fixed effects and age of dam as a linear and quadratic covariable. Mean trends were modeled through a cubic regression on orthogonal pol...

Eighty eight plus trees representing the entire distributional range of Pinus wallichiana (Blue pine or Kail ) in Kashmir Himalaya were sampled to determine the extent and nature of variability and character association in eight cone and seed traits. Wide variations were observed in cone weight (28.16-46.0 g), number of seeds/cone (41.6-90.6) and 1000 seed weight (42.0-67.0 g). Genetic coeffici...

Direct additive and maternal genetic effects on birth and weaning weight of Chios lambs were investigated. The data originated from the Agricultural Research Station of Chalkidiki and comprised 7318 lambs, raised over the period from 1977 to 1992. Variance components were estimated using restricted maximum likelihood, fitting six different animal models, by 2 including or excluding maternal eff...

A study was carried out to assess the genetic variability and association among yield attributing traits in 60 different safflower genotypes over six environments. The pooled analysis of variance (ANOVA) revealed that all attributes had a considerable degree variation.The parameters phenotypic coefficients variation (PCV) higher than genotypic (GCV)for characteristics evaluated, indicating expe...

At the Field Experimentation Centre of Department Genetics and Plant Breeding, 20 rice genotypes, including one check variety, were assessed in order to research genetic variability, heritability, progress, correlation, path coefficient for 13 quantitative features. In Kharif 2022, experiment was carried out utilising a Randomised Block Design with three replications. Over NDR 359 (check), BRRI...

Forty five chickpea genotypes were evaluated under normal and late sown conditions during Rabi,2017-18 in the experimental field of Department Genetics Plant Breeding, C.C.S. University, Meerut Uttar Pradesh. The Randomized Block Design with three replications observations recorded for each genotype replication all studied characters. Analysis variance showed significant variation among charact...

The present experiment was conducted to evaluate the mungbean genotype assess magnitude of genetic variability and understand heritable component variation for seed yield its traits traits. estimates genotypic coefficient variability, heritability advance were high per plant, 100-seed weight, number seeds pod, pods plant nodes on main stem. correlation revealed that had positive significant wit...