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Figure 4 | EvoDevo

Figure 4

From: Parallel developmental genetic features underlie stickleback gill raker evolution

Figure 4

Two additive QTL control gill raker number in three crosses with independent freshwater populations. (A, C) Association of mean ventral row 1 to 3 gill raker number with chromosome 4 (A) or chromosome 20 (C) genotype. The peak marker in the Paxton benthic (PAXB) × Little Campbell marine (LITC) cross is indicated with red asterisks: Chr4_152 for (A) and Stn216 for (C). These two markers are also starred in the Fishtrap Creek (FTC) and Bear Paw Lake (BEPA) crosses. See Additional file 7: Table S2 for a list of which markers are present in each plot. (B, D) Mean ventral row 1 to 3 gill raker number by Chr4_152 (B) or Stn216 (D) genotype of F2s (homozygous marine, red; heterozygous, purple; and homozygous freshwater, blue). Phenotypes are back transformed residuals for a regression to standard length for a mean standard length of 40 mm. Values are presented as mean +/- SEM.

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