VII-VIII List of abbreviations XIV List of tables XVI List of figures XVIII List of appendices XXVI 1 2 2.1 2.1.1 2.1.1.1 2.1.1.2 2.1.1.3 2.1.1.4 2.1.1.5 2.1.1.6 2.1.1.7 2.1.2 2.1.2.1 2.1.2.2 2.2 2.2.1 2.2.2 2.3 2.4 2.4.1 2.4.1.1 2.4.1.2 2.4.2 2.4.3 Introduction Literature review Boar reproductivity Boar sperm quality traits Appearance of semen Sperm concentration Sperm motility Semen volume Pl...

Background: A limited number of studies in non-dairy sheep breeds have investigated the assessment udder morphology on a linear scale. The aim this study was to use scoring approach determine morphological traits Norduz ewes. Methods: Udder were measured once mid-lactation (approximately 90 days) for each ewe before milking. measurements included following traits: width, circumference, length, ...

The sexes often have different phenotypic optima for important life-history traits, and because of a largely shared genome this can lead to a conflict over trait expression. In mammals, the obligate costs of reproduction are higher for females, making reproductive timing and rate especially liable to conflict between the sexes. While studies from wild vertebrates support such sexual conflict, i...

PREMISE OF THE STUDY Plant mating systems and geographic range limits are conceptually linked by shared underlying drivers, including landscape-level heterogeneity in climate and in species' abundance. Studies of how geography and climate interact to affect plant traits that influence mating system and population dynamics can lend insight to ecological and evolutionary processes shaping ranges....

VII-VIII List of abbreviations XIV List of tables XVI List of figures XVIII List of appendices XXVI 1 2 2.1 2.1.1 2.1.1.1 2.1.1.2 2.1.1.3 2.1.1.4 2.1.1.5 2.1.1.6 2.1.1.7 2.1.2 2.1.2.1 2.1.2.2 2.2 2.2.1 2.2.2 2.3 2.4 2.4.1 2.4.1.1 2.4.1.2 2.4.2 2.4.3 Introduction Literature review Boar reproductivity Boar sperm quality traits Appearance of semen Sperm concentration Sperm motility Semen volume Pl...

this is the first description of the polymorphisms of arylalkylamine-n-acetyltransferase (aa-nat) gene in indian goats with different reproductive traits (twinning percentage and age of sexual maturity). based on the important role of aa-nat in reproduction, it is considered as a possible candidate gene for this trait. two novel synonymous snps, c825t (exon2) and c1249t (exon3) were identified....

In this paper the genetic relationships between major reproductive traits in beef cattle (Calving Date, Calving Interval and Age at First Calving) and type traits have been estimated to evaluate the usefulness of type classification in predicting reproductive performance in beef cattle. We estimated favourable genetic correlations between Calving Interval and type traits ranging from 2 0.027 to...

This study evaluated the reproductive and productivity of local Dorper crossbred ewes in a community-based management system. We analyzed data collected from 2013 to 2021, taking into account different factors such as dam-breed, location, type birth, season, year lambing. Lambing was observed all year-round, but majority (35%) occurred September, October, December. suggests that pasture availab...

The aims of this study were to identify the morphometric measurements and body weights Thin-tailed ewe, examine qualitative characteristics ewe close relationship between weight other measurements. This used 40 female Ewe aged under 1 year. method was purposive sampling. Parameters observed face length, ear chest circumference, width, depth, shoulder height, hip front leg hind tail length weigh...