A codominant diagnostic marker for the slow ripening trait in peach

Claudio Meneses, Lissette Ulloa-Zepeda, Alejandra Cifuentes-Esquivel, Rodrigo Infante, Celia M. Cantin, Ignasi Batlle, Pere Arús, Iban Eduardo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The peach [Prunus persica L. (Batsch)] slow ripening (SR) trait is a mutation preventing the normal ripening process. Individuals with this phenotype are discarded in peach breeding programs. This trait is determined by a single gene (Sr/sr), where the recessive homozygote (sr/sr) confers the SR phenotype, and has been mapped to linkage group 4 of the peach genome. A large deletion of 26.6 kb containing the sequence of a NAC transcription factor has been proposed as the causal mutation. Two dominant markers based on the sequence of this region have been assayed previously and found to be diagnostic (genotypes always predicted the phenotypes). However, their dominant nature—a null allele for the marker was associated with the sr allele—made it impossible to predict the individuals that carried the SR trait. Here we used resequencing information to develop a codominant molecular marker for the SR trait in peach. The marker was validated in the ‘Belbinette’ × ‘Nectalady’ F1 and the ‘Venus’ F2 populations, and in 27 lines, 18 of which are known to carry the sr allele. The marker cosegregated with the SR phenotype in all cases, allowing the discrimination of two DNA fragments of different size associated with normal-ripening alleles, in addition to a third fragment associated with the sr allele. The utility of this marker in peach breeding programs is discussed.

Original languageEnglish
Article number77
JournalMolecular Breeding
Volume36
Issue number6
DOIs
Publication statusPublished - 1 Jun 2016

Keywords

  • Fruit quality
  • Marker-assisted selection
  • Molecular marker
  • Prunus persica

ASJC Scopus subject areas

  • Biotechnology
  • Molecular Biology
  • Agronomy and Crop Science
  • Genetics
  • Plant Science

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    Meneses, C., Ulloa-Zepeda, L., Cifuentes-Esquivel, A., Infante, R., Cantin, C. M., Batlle, I., Arús, P., & Eduardo, I. (2016). A codominant diagnostic marker for the slow ripening trait in peach. Molecular Breeding, 36(6), [77]. https://doi.org/10.1007/s11032-016-0506-7