Theoretical and Applied Genetics

, Volume 83, Issue 3, pp 379–384 | Cite as

Evaluation of restriction fragment length polymorphism in Cucumis melo

  • S. L. Neuhausen
Originals

Summary

The objectives of this study were to assess the degree of restriction fragment length polymorphism (RFLP) in Cucumis melo and to determine interrelationships among cultivated varieties. Initial screening of a genomic PstI library revealed that approximately 40% of the clones were repetitive. A total of 162 unique and low-copy sequence clones were hybridized to seven diverse accesions of C. melo and a C. sativus cultivar ‘Pacer’ to evaluate RFLP variation. Of these, 130 probes (80%) detected a polymorphism between C. melo accessions and C. sativus, and the majority were polymorphic with more than one enzyme digest. In contrast, only 53 probes (33%) were useful in differentiating at least one of the seven accessions. Of those, only 9% were informative with more than one enzyme digest. This indicates that within C. melo, the differences among accessions are due to infrequent base substitutions, whereas between the two species, differences are mainly due to genome rearrangements such as insertions and deletions or numerous base substitutions. Of the informative probes, 34 were used in analyzing 44 C. melo lines to establish a data base of RFLP hybridization patterns. Percent similarity based on RFLP profiles was computed among lines and analyzed by principal component analysis, to visualize relationships among lines. There were clear demarcations among, but not within, muskmelon and honeydew groups.

Key words

Restriction fragment length polymorphism (RFLP) Cucumis melo Muskmelon Honeydew melon 

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • S. L. Neuhausen
    • 1
  1. 1.NPISalt Lake CityUSA
  2. 2.Biology DepartmentSlippery Rock UniversitySlippery RockUSA

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