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Association between presence of stromata on maternal plants of autumn bluegrass (Poa autumnalis) from population ANF-3 and two attributes of offspring (A) vertical transmission [seedling endophyte frequency (percentage of laboratory-grown seedlings with Epichloë)], and (B) germination (percentage of seeds that germinated in the laboratory). Bars show means ± s.e. Sample sizes, No: n = 9−11, Yes: n = 32. Asterisk indicate a significant difference (P < 0.05).
