Molecular Genetic Mapping of Papaya
The development of high-density genetic maps is a major advancement in papaya genomic research. Two low-density genetic maps were developed using morphological markers and randomly amplified polymorphic DNA (RAPD) markers. Amplified fragment length polymorphism (AFLP) markers and simple sequence repeat (SSR) markers were used to develop three high-density genetic maps. Detailed analysis of the genetic maps provides insights into the nature of papaya chromosomes including the location of the sex determination region of the sex chromosomes, recombination hot spots, methylation patterns, centromere locations, and regions of high sequence divergence. The high-density SSR genetic map was integrated with the physical map, whole genome sequence, and cytological data, enhancing our ability to identify agronomic important genes.
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