نتایج جستجو برای: milk production traits

تعداد نتایج: 751841  

Journal: :علوم دامی ایران 0
عبداله رضاقلی وند لاهرود دانشجوی کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران محمد مرادی شهربابک استاد پردیس کشاورزی و منابع طبیعی دانشگاه تهران عباس پاکدل دانشیار پردیس کشاورزی و منابع طبیعی دانشگاه تهران

in this research, in order to describe milk production traits lactation mahabadi goat breed, seven statistical functions were fitted using 1665 milk production traits records and 833 body weight records. the milk production traits were milk yield, fat percent, fat yield, protein percent, protein yield, lactose percent and snf percent. these records have been recorded on 123 goats during years o...

Journal: :iranian journal of veterinary research 2014
r. deb u. singh s. kumar r. singh g. sengar

the aim of the present study was to screen the genotype profile of bovine kappa-casein gene among frieswal (hf × sahiwal) crossbred cattle developed in india. a total number of two hundred frieswal cows were evaluated for hinfi rflp based genotyping of kappa-casein gene. we observed that only two genotypes (aa and ab) exist among the studied population with the genotype frequency of 0.58 (n=117...

2013
K. Zhu G. L. Liu L. M. Huang C. B. Zhang F. S. Fu

The objective of this study was to analyze the correlation between Holstein body conformation traits and milk production traits in the Shanghai region. In total, 871 Holstein cows were randomly chosen from 28 dairy farms in Shanghai at second stage of lactation as the object of our study. Five milk production traits, including 305-d milk yield, butter fat percentage, milk protein percentage, pe...

      The present study was conducted to estimate the genetic and phenotypic parameters of productive and reproductive traits of Holstein cows in Mazandaran Holstein dairy cattle. To this purpose, data 39792 records of Holstein cows collected at Mahdasht Milk and Meat Company in sari during 1986 to 2015 were used. Productive traits included corrected 305 days milk records, fat and protein produ...

2012
J. Boleckova

The aim of this study was to estimate allelic and genotypic frequencies of five DNA markers that are positional and functional candidates for milk production traits in Czech Fleckvieh cattle. In addition, we evaluated the association of these markers with milk production traits and breeding values for milk production traits and also estimated linkage disequilibrium (LD) between two markers with...

Journal: :journal of agricultural science and technology 2013
s. a. mousavizadeh a. salehi m. aminafshar m. sayyadnejad m. h. nazemshirazi

abcg2 (atp binding cassette subfamily g member 2) gene, located on chromosome 6 encodes the abcg2 protein that transports various xenobiotics, cytostatic drugs across the plasma membrane as well as cholesterol into milk. a single nucleotide change (a/c) in base 86 of exon 14 is capable of encoding a substitution of tyrosine with serine in the abcg2 gene and increase milk yield while decreasing ...

Journal: :iranian journal of biotechnology 2009
karim karimi mohammad taghi beigi nassiri khalil mirzadeh amin ashayerizadeh hedayatallah roushanfekr

the objective of this study was to determine the polymorphism of bovine β-lactoglobulin (β-lg) gene and its association with milk production traits in iranian najdi cattle. blood samples were collected from 80 najdi cattle from the najdi cattle breeding station located in shoshtar, khuzestan. polymerase chain reaction (pcr) and restriction fragment length polymorphism (rflp) techniqus were used...

ژورنال: علوم آب و خاک 2009
جوزی شکاگورابی, ساحره, شادپرور, عبدالاحد,

In selection index procedure, phenotype and genetic (co)variance matrices of traits are used for calculating different genetic parameters like index coefficients, index variance, genetic gain in selection goal and selection accuracy. Sometimes, it is possible that these matrices become inconsistent or they are not positive, nor definite. In the current study, for investigation of the effect of ...

Journal: :پژوهش های علوم دامی ایران 0

in the research the genetic investigation productive and reproductive traits and changes trend the traits in years, seasons and different lactation periods and genetic evaluation cows and bulls of 785 records for milk and 665 records for fat yield and reproductive information during years 1998 to 2003 of 207 dairy cows ghezlagh farm aboureyhan campus (university of tehran) studied. the least sq...

جوزی شکاگورابی, ساحره, شادپرور, عبدالاحد,

In selection index procedure, phenotype and genetic (co)variance matrices of traits are used for calculating different genetic parameters like index coefficients, index variance, genetic gain in selection goal and selection accuracy. Sometimes, it is possible that these matrices become inconsistent or they are not positive, nor definite. In the current study, for investigation of the effect of ...

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