The genetic analysis of tolerance to infections : a review

v2012o

Genetic architecture of rainbow trout survival from egg to adult

Survival from birth to a reproductive adult is a challenge that only robust individuals resistant to a variety of mortality factors will overcome. To assess whether survival traits share genetic architecture throughout the life cycle, we estimated genetic correlations for survival within fingerling stage, and across egg, fingerling and grow-out stages in farmed rainbow trout. Genetic parameters of survival at three life cycle stages were estimated for 249 166 individuals originating from ten year classes of a pedigreed population. Despite being an important fitness component, survival traits harboured significant but modest amount of genetic variation (h2=0·07–0·27). Weak associations between survival during egg-fry and fingerling periods, between early and late fingerling periods (rG=0·30) and generally low genetic correlations between fingerling and grow-out survival (mean rG=0·06) suggested that life-stage specific survival traits are best regarded as separate traits. However, in the sub-set of data with detailed time of death records, positive genetic correlations between early and late fingerling survival (rG=0·89) showed that during certain years the best genotypes in the early period were also among the best in the late period. That survival across fingerling period can be genetically the same, trait was indicated also by only slightly higher heritability (h2=0·15) estimated with the survival analysis of time to death during fingerling period compared to the analysis treating fingerling survival as a binary character (h2=0·11). The results imply that (1) inherited resistance against unknown mortality factors exists, but (2) ranking of genotypes changes across life stages

Kasvatetun siian ominaisuuksien taloudelliset arvot

vokBEL/BG

Selection potential for feed efficiency in farmed salmonids

vokBEL/BG

Untangling the positive genetic correlation between rainbow trout growth and survival

Peer reviewe

Analisis Perbandingan Acara Hiburan di Radio Kds 8, Gita Fm, dan Rri

: Radio as a medium of mass communication promine function that is information giving, entertaint and educate. As one media are merely audio-only, radio also has the characteristics of a background where the listener does not require visual concentration, but the radio can be heard while doing various activities. In this study, used descriptive research quantitative survey methods, data collection measures trough kousiuner or questionnaires that refer to the Likert scale. Sampling techinique used is the sample random sampling techniques, data analysis using descriptive statistics, which includes the presentation of data, analysis and interpretation of data and drawing conclusions. Therefore, based on the problems and research objective noted above: (1) The radio is most often heard Gita FM radio by 47 %; (2) The most favored entertainment events and is often heard that dangdutan by 57 %; (3) The factors that differentiate particularly poor radio KDS 8 FM, FM Gita and RRI is musical entertainment, announcers and time. Keywords: Entertainment, Comparative Radi

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