Figure 4: Genetic mapping of the citrus polyembryony.
From: Genomic analyses of primitive, wild and cultivated citrus provide insights into asexual reproduction
(a) The phenotype of citrus polyembryony. (b) Mapping the polyembryony by bulk segregant analysis (BSA) of a segregating population derived from HB pummelo × Fairchild mandarin cross. Red arrow indicates the position of the 1.96-Mb peak. The transformed Δ(SNP index) is the product of the Δ(SNP index) and normalized SNP density in each 250-kb sliding window (10-kb steps). (c) Gene-based local association analysis in the relevant region. Top, heat map for association levels in the relevant region. The −log10-transformed P (two-tailed Fisher's exact test) was calculated in each 50-kb sliding window (10-kb steps). Middle, the 80-kb candidate region with the strongest association. Regression line (red) and confidence intervals (gray) were calculated using a linear model at a confidence level of 0.95. Bottom, genes in the candidate region in diploid pummelo. Boxes represent genes; horizontal black line represents intergenic regions; vertical lines show positions of 5′ end of the genes. Genes annotated from the haploid pummelo genome are presented in Supplementary Figure 28.
