Effects of loci on chromosomes 2 (2H) and 7 (5H) on developmental patterns in barley (Hordeum vulgare L.) under different photoperiod regimes

I. Karsai, K. Mészáros, P. M. Hayes, Z. Bedő

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Heading-date in cereals is the final result of a number of interacting characters that include vernalization requirement, photoperiod sensitivity, and earliness per se. Progress in developing adapted varieties may be achieved by determining the chromosomal locations of genes controlling these characters. Nineteen doubled-haploid (DH) lines from the Dicktoo x Morex mapping population were phenotyped in controlled-environment photoperiod experiments to determine the role of two previously detected QTLs on the developmental patterns of barley. The QTLs are hypothesised to represent the effects of the Ppd and Sh2 loci on chromosomes 2 (2H) and 7 (5H), respectively. Alleles at the Ppd locus were found to be vary in response to photoperiod duration. Vernalization had some effect on alleles at both loci. The presence of early and late-flowering transgressive segregants in this mapping population can be explained by interactions between the Ppd and Sh2 loci. The Ppd and Sh2 loci are hypothesised to be homoeologous with the Ppd and Vrn1 loci of wheat.

Original languageEnglish
Pages (from-to)612-618
Number of pages7
JournalTheoretical And Applied Genetics
Volume94
Issue number5
DOIs
Publication statusPublished - Apr 1997

Fingerprint

Chromosomes, Human, Pair 7
Chromosomes, Human, Pair 2
Photoperiod
Hordeum
Hordeum vulgare
photoperiod
barley
chromosomes
loci
Alleles
Controlled Environment
vernalization
Haploidy
Population
Triticum
quantitative trait loci
alleles
doubled haploids
heading
Genes

Keywords

  • Barley
  • Homoeology
  • Photoperiod
  • QTLs
  • Vernalization

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Horticulture
  • Plant Science
  • Genetics
  • Genetics(clinical)

Cite this

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AU - Karsai, I.

AU - Mészáros, K.

AU - Hayes, P. M.

AU - Bedő, Z.

PY - 1997/4

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N2 - Heading-date in cereals is the final result of a number of interacting characters that include vernalization requirement, photoperiod sensitivity, and earliness per se. Progress in developing adapted varieties may be achieved by determining the chromosomal locations of genes controlling these characters. Nineteen doubled-haploid (DH) lines from the Dicktoo x Morex mapping population were phenotyped in controlled-environment photoperiod experiments to determine the role of two previously detected QTLs on the developmental patterns of barley. The QTLs are hypothesised to represent the effects of the Ppd and Sh2 loci on chromosomes 2 (2H) and 7 (5H), respectively. Alleles at the Ppd locus were found to be vary in response to photoperiod duration. Vernalization had some effect on alleles at both loci. The presence of early and late-flowering transgressive segregants in this mapping population can be explained by interactions between the Ppd and Sh2 loci. The Ppd and Sh2 loci are hypothesised to be homoeologous with the Ppd and Vrn1 loci of wheat.

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