Figure 7 : Identification of genetic exchange between subgenomes in cultivated peanut.

From: The genome sequences of Arachis duranensis and Arachis ipaensis, the diploid ancestors of cultivated peanut

Figure 7

The top graph depicts the result of recombination between A04 and B04 in RIL028, and, for comparison, the bottom graph shows RIL025, a typical line where this type of recombination has not occurred (lines described in Zhou et al.41). The y axis shows log2-transformed ratios of densities of mapping for restriction site–associated sequence reads along the diploid chromosomal pseudomolecules divided by the mapping densities of a parental line. The x axis shows the positions of mapping, in 1-Mb windows, along Araip.B04 (red dots) and Aradu.A04 (blue dots), the latter with distances scaled so the homeologous chromosomal pseudomolecules are directly comparable. In RIL028, the relative dosage of the subgenomes has changed greatly in the lower chromosome arms. This indicates that a new event of genetic exchange between the A and B subgenomes occurred.