Table 3. Gene Constellations Present in Hy Reassortants.

Gene Ratio	Gene Constellations								Frequency
	PB2	PB1	PA	HA	NP	NA	M	NS
6∶2	P	P	P	WT	P	WT	P	P	32
5∶3	P	WT	P	WT	P	WT	P	P	13
	P	P	P	WT	WT	WT	P	P	3
	P	P	P	WT	P	WT	P	WT	1
4∶4	P	WT	P	WT	WT	WT	P	P	1
	P	WT	P	WT	P	WT	WT	P	1
	P	WT	P	WT	P	WT	P	WT	1
3∶5	WT	WT	WT	WT	P	WT	P	P	1
	WT	P	P	WT	WT	WT	P	WT	1
2∶6	WT	WT	WT	WT	WT	WT	P	P	1
1∶7	WT	WT	WT	WT	WT	WT	P	WT	1
	WT	WT	WT	WT	P	WT	WT	WT	1

P: hy donor virus A/PR/8/1934 gene. WT: wild type virus gene.