. 2006 Aug;173(4):1991–2004. doi: 10.1534/genetics.106.057562

TABLE 3.

Relative strength of heterokaryon incompatibility reactions in strains with different allelic combinations of un-24 and het-6

	C01(4)-2 un-24 het-6^OR	RLM58-18 un-24^PAhet-6^PA	C01-PA1 (un-24^PA) het-6^OR	C01-6PA un-24^OR (het-6^PA)
C9-2 un-24^ORhet-6^OR	None^a	Strong^b	Weak^c	Weak
C2(2)-5 un-24^PAhet-6^PA	Strong	None	Weak	Weak
C9-2 E18 (un-24^PA) het-6^OR	Weak	Weak	None	Weak
C9-2-6PA un-24^OR (het-6^PA)	Weak	Weak	Weak	None

Escape strains C01-PA1 and C01-6PA were derived from C01(4)-2, C9-2 E18, and C9-2-6PA from C9-2. Allelic designation of the transgene expressed in the escape strain is in parentheses.

None, no heterokaryon incompatibility. Heterokaryons grow at wild-type rates of ∼30 mm/day and conidiate profusely.

Strong, pronounced incompatibility. No, or slight, growth of heterokaryons, no conidiation, escape infrequent even after ∼2 weeks.

Weak, weak incompatibility evident by slow growth rates (∼3 – 8 mm/day), abnormal “flat” morphology, irregular colony margins, and lack of conidiation. Escape to wild-type-like heterokaryons occurs rapidly, usually within ∼4 days.