qRT-PCR analysis of four RGHs. The expression levels of these four RGHs were altered after inoculation and were significantly different between Emian22 and 3–79. UB7 is a constitutively expressed gene in cotton and was used as the internal control gene, and error bars indicate the SD of three sample replicates (t-test, *P < 0.05, **P < 0.01). “0-96 h” indicates 0–96 h after inoculation. Markers showing differences between Emian22 and 3–79 are underlined.