The inheritance of resistance to Verticillium wilt caused by race 1 isolates of Verticillium dahliae in the lettuce cultivar La Brillante

Ryan J. Hayes, Leah K. McHale, Gary E. Vallad, Maria Jose Truco, Richard W Michelmore, Steve J. Klosterman, Karunakaran Maruthachalam, Krishna V. Subbarao

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

Verticillium wilt of lettuce caused by Verticillium dahliae can cause severe economic damage to lettuce producers. Complete resistance to race 1 isolates is available in Lactuca sativa cultivar (cv.) La Brillante and understanding the genetic basis of this resistance will aid development of new resistant cultivars. F 1 and F 2 families from crosses between La Brillante and three iceberg cultivars as well as a recombinant inbred line population derived from L. sativa cv. Salinas 88 × La Brillante were evaluated for disease incidence and disease severity in replicated greenhouse and field experiments. One hundred and six molecular markers were used to generate a genetic map from Salinas 88 × La Brillante and for detection of quantitative trait loci. Segregation was consistent with a single dominant gene of major effect which we are naming Verticillium resistance 1 (Vr1). The gene described large portions of the phenotypic variance (R 2 = 0.49-0.68) and was mapped to linkage group 9 coincident with an expressed sequence tag marker (QGD8I16. yg. ab1) that has sequence similarity with the Ve gene that confers resistance to V. dahliae race 1 in tomato. The simple inheritance of resistance indicates that breeding procedures designed for single genes will be applicable for developing resistant cultivars. QGD8I16. yg. ab1 is a good candidate for functional analysis and development of markers suitable for marker-assisted selection.

Original languageEnglish (US)
Pages (from-to)509-517
Number of pages9
JournalTheoretical And Applied Genetics
Volume123
Issue number4
DOIs
StatePublished - Aug 2011

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Biotechnology

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    Hayes, R. J., McHale, L. K., Vallad, G. E., Truco, M. J., Michelmore, R. W., Klosterman, S. J., Maruthachalam, K., & Subbarao, K. V. (2011). The inheritance of resistance to Verticillium wilt caused by race 1 isolates of Verticillium dahliae in the lettuce cultivar La Brillante. Theoretical And Applied Genetics, 123(4), 509-517. https://doi.org/10.1007/s00122-011-1603-y