A two step cleavage processing of polypeptides for maturation of virus was found Noncoding regions(NCRs) may influence transcription and/or translation of IBDV.Formation VP1 VP3 complexes is likely to be a key step for the morphogenesis of IBDV particles.

• 病毒多肽成熟需经二次切割 ,NCR可影响病毒的转录和 /或翻译 ,VP1 - VP3复合体的形成是 IBDV装配的重要环节。