Effects of loci determining photoperiod sensitivity (Ppd-H1) and vernalization response (Sh2) on agronomic traits in the 'Dicktoo' x 'Morex' barley mapping population

I. Karsai, K. Mészáros, P. Szücs, P. M. Hayes, L. Láng, Z. Bedő

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The objectives of this research were to determine the individual and interaction effects of the Ppd-H1 and Sh2 loci on agronomic traits under short-and long-photoperiod regimes. Nineteen doubled haploid (DH) lines from the 'Dicktoo' x 'Morex' mapping population, which represented the four genotypes at the Ppd-H1 and Sh2 loci, were phenotyped in controlled environment photoperiods. Both Ppd-H1 and Sh2 had significant effects on several agronomic traits, in addition to their role in determining first node appearance and flowering time. The magnitude of these effects depended on daylight. Under long-day conditions (18h) Ppd-H1, and under short-day conditions (12 h) Sh2 was a significant determinant of most characters. The interactions between these two loci were significant for several characters, particularly for yield components, under both long- and short-photoperiod regimes. Under the long-day treatment, Ppd-H1 influenced plant height through the determination of node number. There was an epistatic association between the two loci for both 1000-kernel weight and tillering. The combination of photoperiod insensitivity and vernalization requirement caused a significant increase in tillering. This was paralleled by a decrease in 1000-kernel weight. Under the long-day treatment, neither Ppd-H1 nor Sh2 influenced plant yield. Under short-day conditions, the combination of photoperiod insensitivity and vernalization requirement had a pronounced negative effect on plant yield.

Original languageEnglish
Pages (from-to)399-403
Number of pages5
JournalPlant Breeding
Volume118
Issue number5
DOIs
Publication statusPublished - Nov 1999

Fingerprint

vernalization
Photoperiod
Hordeum
agronomic traits
photoperiod
barley
loci
Population
tillering
Weights and Measures
Controlled Environment
Haploidy
doubled haploids
seeds
yield components
Genotype
flowering
genotype
Research

Keywords

  • Hordeum vulgate
  • Photoperiod sensitivity
  • QTL
  • Vernalization
  • Yield components

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science
  • Biotechnology

Cite this

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title = "Effects of loci determining photoperiod sensitivity (Ppd-H1) and vernalization response (Sh2) on agronomic traits in the 'Dicktoo' x 'Morex' barley mapping population",
abstract = "The objectives of this research were to determine the individual and interaction effects of the Ppd-H1 and Sh2 loci on agronomic traits under short-and long-photoperiod regimes. Nineteen doubled haploid (DH) lines from the 'Dicktoo' x 'Morex' mapping population, which represented the four genotypes at the Ppd-H1 and Sh2 loci, were phenotyped in controlled environment photoperiods. Both Ppd-H1 and Sh2 had significant effects on several agronomic traits, in addition to their role in determining first node appearance and flowering time. The magnitude of these effects depended on daylight. Under long-day conditions (18h) Ppd-H1, and under short-day conditions (12 h) Sh2 was a significant determinant of most characters. The interactions between these two loci were significant for several characters, particularly for yield components, under both long- and short-photoperiod regimes. Under the long-day treatment, Ppd-H1 influenced plant height through the determination of node number. There was an epistatic association between the two loci for both 1000-kernel weight and tillering. The combination of photoperiod insensitivity and vernalization requirement caused a significant increase in tillering. This was paralleled by a decrease in 1000-kernel weight. Under the long-day treatment, neither Ppd-H1 nor Sh2 influenced plant yield. Under short-day conditions, the combination of photoperiod insensitivity and vernalization requirement had a pronounced negative effect on plant yield.",
keywords = "Hordeum vulgate, Photoperiod sensitivity, QTL, Vernalization, Yield components",
author = "I. Karsai and K. M{\'e}sz{\'a}ros and P. Sz{\"u}cs and Hayes, {P. M.} and L. L{\'a}ng and Z. Bedő",
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T1 - Effects of loci determining photoperiod sensitivity (Ppd-H1) and vernalization response (Sh2) on agronomic traits in the 'Dicktoo' x 'Morex' barley mapping population

AU - Karsai, I.

AU - Mészáros, K.

AU - Szücs, P.

AU - Hayes, P. M.

AU - Láng, L.

AU - Bedő, Z.

PY - 1999/11

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N2 - The objectives of this research were to determine the individual and interaction effects of the Ppd-H1 and Sh2 loci on agronomic traits under short-and long-photoperiod regimes. Nineteen doubled haploid (DH) lines from the 'Dicktoo' x 'Morex' mapping population, which represented the four genotypes at the Ppd-H1 and Sh2 loci, were phenotyped in controlled environment photoperiods. Both Ppd-H1 and Sh2 had significant effects on several agronomic traits, in addition to their role in determining first node appearance and flowering time. The magnitude of these effects depended on daylight. Under long-day conditions (18h) Ppd-H1, and under short-day conditions (12 h) Sh2 was a significant determinant of most characters. The interactions between these two loci were significant for several characters, particularly for yield components, under both long- and short-photoperiod regimes. Under the long-day treatment, Ppd-H1 influenced plant height through the determination of node number. There was an epistatic association between the two loci for both 1000-kernel weight and tillering. The combination of photoperiod insensitivity and vernalization requirement caused a significant increase in tillering. This was paralleled by a decrease in 1000-kernel weight. Under the long-day treatment, neither Ppd-H1 nor Sh2 influenced plant yield. Under short-day conditions, the combination of photoperiod insensitivity and vernalization requirement had a pronounced negative effect on plant yield.

AB - The objectives of this research were to determine the individual and interaction effects of the Ppd-H1 and Sh2 loci on agronomic traits under short-and long-photoperiod regimes. Nineteen doubled haploid (DH) lines from the 'Dicktoo' x 'Morex' mapping population, which represented the four genotypes at the Ppd-H1 and Sh2 loci, were phenotyped in controlled environment photoperiods. Both Ppd-H1 and Sh2 had significant effects on several agronomic traits, in addition to their role in determining first node appearance and flowering time. The magnitude of these effects depended on daylight. Under long-day conditions (18h) Ppd-H1, and under short-day conditions (12 h) Sh2 was a significant determinant of most characters. The interactions between these two loci were significant for several characters, particularly for yield components, under both long- and short-photoperiod regimes. Under the long-day treatment, Ppd-H1 influenced plant height through the determination of node number. There was an epistatic association between the two loci for both 1000-kernel weight and tillering. The combination of photoperiod insensitivity and vernalization requirement caused a significant increase in tillering. This was paralleled by a decrease in 1000-kernel weight. Under the long-day treatment, neither Ppd-H1 nor Sh2 influenced plant yield. Under short-day conditions, the combination of photoperiod insensitivity and vernalization requirement had a pronounced negative effect on plant yield.

KW - Hordeum vulgate

KW - Photoperiod sensitivity

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KW - Vernalization

KW - Yield components

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