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Maternal dietary n-3 fatty acids affect yolk and liver composition in broiler progeny

Maternal dietary n-3 fatty acids affect yolk and liver composition in broiler progeny. Astrid Koppenol. Introduction. Yolk provides FA to embryo (80% absorbed ) YSM: uptake and transfer of lipids from yolk to embryonic circulation Consumption eggs : dietary  yolk n-3 PUFA

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Maternal dietary n-3 fatty acids affect yolk and liver composition in broiler progeny

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  1. Maternal dietary n-3 fatty acids affect yolk and liver composition in broiler progeny Astrid Koppenol

  2. Introduction • Yolkprovides FA to embryo (80% absorbed) • YSM: uptakeand transfer of lipids fromyolktoembryoniccirculation • Consumptioneggs: dietary  yolk n-3 PUFA • Broilers? n-3 PUFA  eicosanoids immunity - 50% of totalamount of FA originally present in the yolkincorporatedinto tissues of chick- 50% of total FA present in yolkundergoesβ-oxidationtoprovide energy

  3. Objectives • Investigate the effect of dietaryFA’s in breeder feed • Arachidonic acid AA (20:4 n-6) • Eicosapentaenoic acid EPA (20:5 n-3) • Docosahexaenoic acid DHA (22:6 n-3) • on: • FA composition of • Yolk • Residualyolk • Progenyliver

  4. Experimental Design 4 T: 1. control (AA) 2. EPA=DHA 3. DHA>EPA 4. EPA> DHA d1d14 d30 Freshyolk Residualyolk Liver

  5. Egg, yolkandresidualyolkweight ResultsandDiscussion • Significant differences in • Eggweight • Yolkweight • Residualyolkweight • between control groupand n-3 enrichedgroups

  6. n-6/n-3 ratio ResultsandDiscussion Freshyolk Residualyolk • Control eggs: • more n-6 FA • Less n-3 FA Dietary n-3 enrichmentlowers n-6/n-3

  7. AA, EPA and DHA conc ResultsandDiscussion Freshyolk Residualyolk FRESH YOLK • Control group: • Higher AA conc • Lower DHA and EPA conc • Dietary EPA • increases EPA andDHA in yolk • Dietary DHA • results in onlyhigher DHA conc • Effect is lesspronounced • Allenrichedgroups: • Much more DHA availablefor the • Progenycomparedto control group

  8. AA, EPA and DHA conc ResultsandDiscussion LIVER D1 EPA conc in DHA group is increased comparedto RY conc Allconc are higher Biomagnification of essential PUFA

  9. Biomagnification of essential PUFA ResultsandDiscussion = proportion of essential C20-22 FA increaseseach stage of transfer processfrom RY to embryo Preferentialuptakefromyolkby YSM In YSM: DHA translocatedto TAG, resulting in enriched VLDL releasedintocirculation Preferentialmobilisationfromadipose TAG into plasma

  10. DHA vs EPA ResultsandDiscussion DHA more present earlyin the post hatch life, while EPA remainslow andequal in progenyliver

  11. Conclusion • Dietary n-3 enrichment • Decreaseeggweight, yolkweightandresidualyolkweight • Lowersn-6/n-3 ratio in freshyolkandresidualyolk • More DHA availablefor transfer tooffspringfromresidualyolk • Adding DHA tomaternaldietresults in • higherDHA concentration in freshandresidualyolk • Adding EPA tomaternaldietresults in • more EPA and DHA in residualyolk • Biomagnificationduring transfer from RY to tissue of offspring • DHA present in higherconcearly in post hatch life

  12. Thank you for your attention!Any Questions? Astrid Koppenol

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