Mapping and characterization of novel parthenocarpy QTLs in tomato

B.J.M. Gorguet, P.M. Eggink, J. Ocaña, A. Tiwari, E.H. Schipper, H.J. Finkers, R.G.F. Visser, A.W. van Heusden

Research output: Contribution to journalArticleAcademicpeer-review

44 Citations (Scopus)

Abstract

Parthenocarpy is the development of the fruit in absence of pollination and/or fertilization. In tomato, parthenocarpy is considered as an attractive trait to solve the problems of fruit setting under unfavorable conditions. We studied the genetics of parthenocarpy in two different lines, IL5-1 and IVT-line 1, both carrying Solanum habrochaites chromosome segments. Parthenocarpy in IL5-1 is under the control of two QTLs, one on chromosome 4 (pat4.1) and one on chromosome 5 (pat5.1). IVT-line 1 also contains two parthenocarpy QTLs, one on chromosome 4 (pat4.2) and one on chromosome 9 (pat9.1). In addition, we identified one stigma exsertion locus in IL5-1, located on the long arm of chromosome 5 (se5.1). It is likely that pat4.1, from IL5-1 and pat4.2, from IVT-line 1, both located near the centromere of chromosome 4 are allelic. By making use of the microsynteny between tomato and Arabidopsis in this genetic region, we identified ARF8 as a potential candidate gene for these two QTLs. ARF8 is known to act as an inhibitor for further carpel development in Arabidopsis, in absence of pollination/fertilization. Expression of an aberrant form of the Arabidopsis ARF8 gene, in tomato, has been found to cause parthenocarpy. This candidate gene approach may lead to the first isolation of a parthenocarpy gene in tomato and will allow further use in several crop species
Original languageEnglish
Pages (from-to)755-767
JournalTheoretical and Applied Genetics
Volume116
Issue number6
DOIs
Publication statusPublished - 2008

Keywords

  • quantitative trait loci
  • lycopersicon-esculentum
  • botrytis-cinerea
  • resistance
  • hirsutum
  • set
  • auxin-response-factor8
  • identification
  • introgression
  • chromosomes

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