Construction of physical maps for the sex-specific regions of papaya sex chromosomes.

ABSTRACT:

Background

Papaya is a major fruit crop in tropical and subtropical regions worldwide. It is trioecious with three sex forms: male, female, and hermaphrodite. Sex determination is controlled by a pair of nascent sex chromosomes with two slightly different Y chromosomes, Y for male and Yh for hermaphrodite. The sex chromosome genotypes are XY (male), XYh (hermaphrodite), and XX (female). The papaya hermaphrodite-specific Yh chromosome region (HSY) is pericentromeric and heterochromatic. Physical mapping of HSY and its X counterpart is essential for sequencing these regions and uncovering the early events of sex chromosome evolution and to identify the sex determination genes for crop improvement.

Results

A reiterate chromosome walking strategy was applied to construct the two

SUBMITTER: Na JK 

PROVIDER: S-EPMC3430574 | biostudies-literature | 2012 May

REPOSITORIES: biostudies-literature