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- W1925437259 abstract "OZET: Bu calismanin amaci, Esmer sigirlarda 305 gunluk sut verimi ve laktasyon suresine iliskin yonelim unsurlari ile genetik korelasyonu tahmin etmektir, Genetik yonelimlerin hesaplanmasinda 1985-97 yillarina ait Esmer ineklerden alinan sut verim kayitlari kullanilmistir. 305 gunluk sut verimleri ve laktasyon suresi laktasyon sirasi ile buzagilama mevsimi bakimindan duzeltilmistir. Fenotipik yonelim duzeltilmis yillik ortalamalarin yillara regresyonu olarak 305 gunluk sut verimi ve laktasyon suresi icin 3.32 kg/yil ve -4.16 gun/yil olarak bulunmustur. Ayni hayvanlarin birbirini izleyen iki yildaki verimleri arasindaki farkin yildan yila degisen cevreden ileri geldigi kabul edilerek cevresel yonelim hesaplanmistir. Buna gore 305 gunluk sut verimi ve laktasyon suresi icin cevresel yonelimler -99 kg/yil ve -9.16 gun/yil olarak tespit edilmistir. Genetik yonetim 305 gunluk sut verimi icin 102 kg/yil; laktasyon suresi icin 5 gun/yil olarak gerceklesmistir. 305 gunluk sut verimi ile laktasyon suresi arasindaki genetik korelasyon 0.832:1:0.038 olarak tahmin edilmistir. Anahtar kelimeler: Esmer, sigir, sut verimi, laktasyon suresi, genetik yonelim, genetik korelasyon. Estimates of Trend Components and Genetic Correlation of Milk Yield Traits In Brown Swiss Cattle ABSTRACT: The purpose of this study is to estImate the trends components of 305-day milk yield and lactation length and genetic correlation between 305 days milk yield and lactation length in Brown Swiss Cattle, In this study data for the milk yield collected though the years 1985-97 from Brown Swiss cows were used in the genetic analysis. 305 days milk yields and lactation length were corrected to lactation numbers and calving season. The Phenotypic trends as regressions of the corrected milk yield averages on years for 305 days milk yield and lactation length were found to be 3.3 2 kg/year and -4.16 day/year. The environmental effect on the phenotypic trend was estimated by using corrected milk yield and lactation length records of cows for 2 consecutive years. The difference between the first and second year milk records of a cow was assumed to be a result of environmental fluctuations. The environmental change for 305 days milk yield and lactation length per year was estimated as -99 kg/year and -9.16 day/year. Considering this value, the genetic chance for 305 days milk yield and lactation length was calculated to be 102 kg/year and 5 day/year. Genetic carrelation between 305 days milk yield and lactation length was determined as 0.832::1::0.038. Key words: Brown Swiss, cattle, milk yield, lactation length, genetic trends, genetic correlation." @default.
- W1925437259 created "2016-06-24" @default.
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- W1925437259 date "2011-01-10" @default.
- W1925437259 modified "2023-09-26" @default.
- W1925437259 title "Esmer Irk Sığırlarda Süt Verim Özelliklerine İlişkin Genetik Yönelim Unsurlarının ve Genetik Korelasyonun Tahmini / Estimates of Trend Components and Genetic Correlation of Milk Yield Traits In Brown Swiss Cattle" @default.
- W1925437259 doi "https://doi.org/10.17097/zfd.83950" @default.
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