highly significantP < 0.001
Expression of NaPi-IIb fragment and TRPV6 in the duodenum of laying hens in response to dietary MI supplementation A highly significant strain × diet interaction was observed only for the expression of NaPi-IIb fragment (NaPi-IIb fragment: P < 0.001; TRPV6: P = 0.163; Fig. 2 ).