نتایج جستجو برای: egg external trait

تعداد نتایج: 309364  

Journal: :journal of livestock science and technologies 2014
m. ahmadi a. k. esmailizadeh a. ayatollahi mehrgardi e. nasirifar

an f2 japanese quail population was developed by crossing two strains (wild and white) to map quantitative trait loci (qtl) for performance and carcass traits. a total of 472 f2 birds were reared and slaughtered at 42 days of age. performance and carcass traits were measured on all of the f2 individuals. parental (p0), f1 and f2 individuals were genotyped with 3 microsatellites from quail chrom...

احمدیان, لیلا, شیخی, سیامک , عیسی زادگان, علی ,

 Background & Aims: People’s health and well-being maybe determined by the interaction of endogenous and external rhythms. Late chronotypes should become anxious. The purpose of the present study was to investigate the relationship between circadian types (morningness-eveningness) and anxiety among the university students.  Materials & Methods: The method of present study was causal-comparative...

Journal: Poultry Science Journal 2019
Cahyadi M, Dewanti R Fauzy R

The present study was conducted to determine egg production traits and egg quality characteristics in black and brown lines of Japanese quail. A total of 500 quails comprising 400 females and 100 males obtained from two breeding centers were raised according to the standard procedure for Japanese quail. They were grouped in according to their plumage colours. Age at first egg-laying has been re...

2014
Robert W. Chapman Benjamin J. Reading Craig V. Sullivan

Inherited gene transcripts deposited in oocytes direct early embryonic development in all vertebrates, but transcript profiles indicative of embryo developmental competence have not previously been identified. We employed artificial intelligence to model profiles of maternal ovary gene expression and their relationship to egg quality, evaluated as production of viable mid-blastula stage embryos...

2013
Ardeshir Bahmanimehr

Identification of genes determining the expression of economically important traits of plants and animals is a main research focus in agricultural genomics. Most of these traits are characterized by a wide variability of the expression of genes at certain loci called quantitative trait loci (QTL). Characterization of the chromosomal regions carrying QTL can be applied in marker-assisted Selecti...

Adin Selcuk, Erkan Esen, Fatih Ozdogan, Halil erdem Ozel, Selahattin Genc, Serdar Baser,

Since identical twins occur as a result of the division of one egg, they have the same genetic structure. Therefore, their phenotypes and sex are also always the same. However, due to the effect of environmental factors, some of the characteristics of twins living in different regions appear to develop differently. In our case of 17-year-old maternal twins, we emphasized that nasal pathologies ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی 1394

abstract previous studies on willingness to communicate (wtc) have shown the influence of many individual or situational factors on students’ tendency to engage in classroom communication, in which wtc has been viewed either at the trait-level or situational level. however, due to the complexity of the notion of willingness to communicate, the present study suggests that these two strands are ...

Journal: :Current Biology 2014
Xiaolin Wang Alexander W.A. Kellner Shunxing Jiang Qiang Wang Yingxia Ma Yahefujiang Paidoula Xin Cheng Taissa Rodrigues Xi Meng Jialiang Zhang Ning Li Zhonghe Zhou

BACKGROUND The pterosaur record is generally poor, with little information about their populations, and pterosaur eggs are even rarer, with only four isolated and flattened eggs found to date. RESULTS We report here a population of a new sexually dimorphic pterosaur species (Hamipterus tianshanensis gen. et sp. nov.), with five exceptionally well-preserved three-dimensional eggs, from the Ear...

2012
Jacintha Ellers E. Toby Kiers Cameron R. Currie Bradon R. McDonald Bertanne Visser

Correspondence: E-mail: [email protected] Abstract Loss of traits can dramatically alter the fate of species. Evidence is rapidly accumulating that the prevalence of trait loss is grossly underestimated. New findings demonstrate that traits can be lost without affecting the external phenotype, provided the lost function is compensated for by species interactions. This is important because trait lo...

Journal: :Brazilian Journal of Poultry Science 2021

The aim of this study was to evaluate the effect rearing systems and genotypes on production performance egg quality. Isa Brown New Hampshire were used in study. These two housed floor organic systems. During experimental period, which lasted one year (52 weeks), following parameters recorded: production, daily mass, feed consumption, conversion efficiency, mortality. Fifteen eggs per group col...

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