Genome structure, evolution and diversity in common bean ( Phaseolus vulgaris) and its relatives

TL;DRAbstract

The legume family (Fabaceae) is the third largest family of higher plants, including a number of agriculturally important crops. Recent progress in genome sequencing of multiple legume species has provided useful resources to study chromosome biology in combination with fluorescence in situ hybridization (FISH) technology. In this thesis research, we report chromosome studies of two important legume crops: common bean (Phaseolus vulgaris ) and cowpea (Vigna unguiculata). Using a large set of genome sequencing data and bacterial artificial chromosome (BAC) end sequences, centromeric satellite repeats were identified and characterized in common bean. We found several interesting features of centromere structures unique to common bean. Using the centromeric repeats, subtelomeric repeat khipu, rDNAs, and chromosome-specific BAC clones, a FISH-based karyotype map of common bean was established. We applied these karyotyping tools to several common bean accessions and relatives. Comparison of

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