Selection for Egg Mass in the Domestic Fowl
نویسندگان
چکیده
منابع مشابه
Regression in Egg Production in the Domestic Fowl When Selection Is Relaxed.
T H E question of what happens to egg production when selection is relaxed in commercial strains of chickens selected over many generations for high performance is of practical importance because of the economic implications to commercial breeding practice. Breeders would like to know whether the genetic gains they have made over many years of selection can be maintained in flocks with no furth...
متن کاملSelection for egg production and correlated responses in the fowl.
HE effectiveness of selection for genetic improvement of egg production in the fowl remains a controversial issue. Mass selection on annual egg records has long been regarded as ineffective as demonstrated by the early work of PEARL (1915), while selection based on family records and progeny testing has seemed to be the key to success as demonstrated by the long-time selection experiments of DE...
متن کاملthe test for adverse selection in life insurance market: the case of mellat insurance company
انتخاب نامساعد یکی از مشکلات اساسی در صنعت بیمه است. که ابتدا در سال 1960، توسط روتشیلد واستیگلیتز مورد بحث ومطالعه قرار گرفت ازآن موقع تاکنون بسیاری از پژوهشگران مدل های مختلفی را برای تجزیه و تحلیل تقاضا برای صنعت بیمه عمر که تماما ناشی از عدم قطعیت در این صنعت میباشد انجام داده اند .وهدف از آن پیدا کردن شرایطی است که تحت آن شرایط انتخاب یا کنار گذاشتن یک بیمه گزار به نفع و یا زیان شرکت بیمه ...
15 صفحه اولThe Correlation between Egg Production during Various Periods of the Year in the Domestic Fowl.
INTRODUCTION ................................................................. 27 PRESENTATION OF RESULTS ...................................................... 29 The correlation between monthly egg record and annual egg production.. .. 29 The correlation between monthly egg record and the total production of the remaining eleven months .............................................. 44 The cor...
متن کاملThe Correlation between First- and Second-Year Egg Production in the Domestic Fowl.
INTRODUCTION. .......... ....................................................... Historical. ..................................................................... Materials and methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analysis of data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1981
ISSN: 0032-5791
DOI: 10.3382/ps.0601115