A primary genetic map of the pericentromeric region of the human X chromosome.

Abstract:

:We report a genetic linkage map of the pericentromeric region of the human X chromosome, extending from Xp11 to Xq13. Genetic analysis with five polymorphic markers, including centromeric alpha satellite DNA, spanned a distance of approximately 38 cM. Significant lod scores were obtained with linkage analysis in 26 families from the Centre d'Etude du Polymorphisme Humain, establishing estimates of genetic distances between these markers and across the centromere. Physical mapping experiments, using a panel of somatic cell hybrids segregating portions of the X chromosome due to translocations or deletions, are in agreement with the multilocus linkage analysis and indicate the order Xp11 . . . DXS7(L1.28)-TIMP- DXZ1(alpha satellite, cen)- DXS159(cpX73)-PGK1 . . . Xq13. The frequency of recombination in the two approximately 20-cM intervals flanking alpha satellite on either chromosome arm was roughly proportional to the estimated physical distance between markers; no evidence for a reduced crossover frequency was found in the intervals adjacent to the centromere. However, significant interfamilial variations in recombination rates were noted in this region. This primary map should be useful both as a foundation for a higher resolution centromere-based linkage map of the X chromosome and in the localization of genes to the pericentromeric region.

journal_name

Genomics

journal_title

Genomics

authors

Mahtani MM,Willard HF

doi

10.1016/0888-7543(88)90017-1

subject

Has Abstract

pub_date

1988-05-01 00:00:00

pages

294-301

issue

4

eissn

0888-7543

issn

1089-8646

journal_volume

2

pub_type

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