Genetic parameters of growth in rainbow trout, Oncorhynchus mykiss, at early rearing stage

نویسنده

چکیده مقاله:

The heritability response for growth of rainbow trout during early developmental stages was detected on the basis of full-sib and half-sib cross between the selected lines. The experiment was done in Shahid Bahonar Salmon Propagation Center, Kelardasht, Iran. Breeders were taken from the stocks maintained in this station. A bifactorial cross was done between two line using four randomly sire and four randomly chosen dams form each line Analysis of variance revealed a significant difference at 300 days of age between half and full-sib (p<0.026). The effective difference in weight between half/full-sibs of juveniles was not statistically significant on 150 days (p>0.817) and 225 days (p>0.081). No significant difference between mean body weight of male and female half-sib group was found (p>0.05); neither were there significant differences between sireline (p<0.324) and dam line (p<0.230) at age of 300 days. The heritability ranged from 0.093 to 0.223 in sire and 0.11 to 0.329 in dam groups. The average heritability in sire regardless of age was 0.16 and in dams 0.21. The heritability in total regardless of age and sex was estimated about 0.185. Genetic parameters (h2) were different between dams (0.15-0.27) and sires (0.13-0.19) for all ages of samplings and for age of 150 day old, was significant (p<0.035). &nbsp;

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Genetic parameters of growth in rainbow trout, Oncorhynchus mykiss, at early rearing stage

The heritability response for growth of rainbow trout during early developmental stages was detected on the basis of full-sib and half-sib cross between the selected lines. The experiment was done in Shahid Bahonar Salmon Propagation Center, Kelardasht, Iran. Breeders were taken from the stocks maintained in this station. A bifactorial cross was done between two line using four randomly sire an...

متن کامل

Rainbow Trout, Oncorhynchus mykiss

Rainbow trout are classified as Oncorhynchus mykiss, and as such belong to the same genus as Pacific salmon, and to the family Salmonidae, which includes Atlantic salmon (Salmo salar), various trout (Salvelinus sp.), Arctic char (Salvelinus alpinus), Arctic grayling (Thymallus arcticus) and whitefish (Coregonus sp.). Rainbow trout are native to areas around the North Pacific Ocean, from souther...

متن کامل

Accounting for early rearing density effects on growth in the genetic evaluation of rainbow trout, Oncorhynchus mykiss.

In fish breeding, full-sib families are often kept in separate tanks until individuals are large enough to be tagged and pooled. This practice induces substantial environmental variation common to full sibs (VFS) in BW. We used multigeneration data on rainbow trout to investigate how variation among families in early rearing density affects BW at different ages and environments (fresh water and...

متن کامل

Genetic diversity in Chilean populations of rainbow trout, Oncorhynchus mykiss

The rainbow trout Oncorhynchus mykiss, was first introduced in Chile between 1905 and 1920 and is currently widely distributed in Chile from Antofagasta (23°S) to Patagonia (55oS). The broad range of the geographic and climatic distributions of this species in Chile offers a unique opportunity to study the effect of naturalization of an introduced species on its genetic variability. It is of pa...

متن کامل

Marker-assisted estimation of quantitative genetic parameters in rainbow trout, Oncorhynchus mykiss.

Estimation of quantitative genetic parameters conventionally requires known pedigree structure. However, several methods have recently been developed to circumvent this requirement by inferring relationship structure from molecular marker data. Here, two such marker-assisted methodologies were used and compared in an aquaculture population of rainbow trout (Oncorhynchus mykiss). Firstly a regre...

متن کامل

Estimation of genetic parameters for growth traits in a breeding program for rainbow trout (Oncorhynchus mykiss) in China.

Genetic parameters and breeding values for growth traits were estimated in the first and, currently, the only family selective breeding program for rainbow trout (Oncorhynchus mykiss) in China. Genetic and phenotypic data were collected for growth traits from 75 full-sibling families with a 2-generation pedigree. Genetic parameters and breeding values for growth traits of rainbow trout were est...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


عنوان ژورنال

دوره 7  شماره None

صفحات  121- 136

تاریخ انتشار 2008-01

با دنبال کردن یک ژورنال هنگامی که شماره جدید این ژورنال منتشر می شود به شما از طریق ایمیل اطلاع داده می شود.

کلمات کلیدی

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023