The influence of photoperiod on the <i>Vrn‐H2</i> locus (4H) which is a major determinant of plant development and reproductive fitness traits in a facultative × winter barley (<i>Hordeum vulgare</i> L.) mapping population

Karsaï, I.; Mészáros, Katalin; Szűcs, Péter; Hayes, Patrick; Láng, L.; Bedö, Z.

doi:10.1111/j.1439-0523.2006.01266.x

Cited by 19 publications

(15 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Combinations of alleles at the VRN-1 and PPD-1 loci have been reported to result in variation in agronomic traits and physiological development such as flowering time [ 20 , 21 , 22 ], tillering, spikelet number, and plant height [ 9 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Allelic variation of vernalization and photoperiod response genes in a diverse set of North American high latitude winter wheat genotypes

et al. 2018

View full text Add to dashboard Cite

The major physiological determinants of wheat (Triticum aestivum L.) phenology in a given area are a response to vernalization temperature and day length, which are at least in part, regulated by the allelic variation at the vernalization (VRN) and photoperiod (PPD) loci, respectively. Characterization of the existing genetic variation for plant phenology in winter wheat can assist breeding programs improve adaptation to local environments and to optimize wheat phenology for the changing climate. The objectives of this research were to characterize the allelic variation at the major VRN and PPD loci in a diverse panel of high latitude winter wheat genotypes (n = 203) and to associate the allelic variation with phenologic, agronomic and adaptation traits. The panel was genotyped using allele-specific markers at vernalization (VRN-A1, VRN-B1, VRN-D1 and VRN-B3) and photoperiod (PPD-A1, PPD-B1, and PPD-D1) loci and phenotyped for agronomically-important traits. Though photoperiod sensitivity was more prevalent, most of the variation in the phenology of the winter wheat panel was explained by allelic variation at PPD-D1, PPD-A1, and the interaction between these loci. While a typical high latitude winter wheat genotype is one that carries winter alleles at all major VRN loci and photoperiod sensitive alleles at the major PPD loci, in lower latitudes where winters are milder, the presence of one or two photoperiod insensitive alleles seems to contribute to higher yield and wider adaptation.

show abstract

Section: Introductionmentioning

confidence: 99%

Allelic variation of vernalization and photoperiod response genes in a diverse set of North American high latitude winter wheat genotypes

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Vernalization affects not only heading time, but also the relative duration of phases of plant development. Thus, different combinations of vernalization alleles might affect the balance of number of tillers and spike size, even within the same maturity group (Karsai et al. 2006).…”

Section: Discussionmentioning

confidence: 99%

Yield QTL affected by heading date in Mediterranean grown barley

et al. 2009

Self Cite

View full text Add to dashboard Cite

Knowledge regarding quantitative trait loci (QTL) has led to remarkable advances in breeding for a variety of traits, some of which have an effect on yield under particular environmental conditions. However, the same yield QTL are not usually found, even in the same population tested in different environments, as a result of large genotype-byenvironment interactions. In this study, we aimed at identifying yield QTL in a series of experiments carried out in Spain. We used a barley doubled haploid population derived from a spring by winter cross. The relationship between heading date and yield, and between the principal heading date QTL and yield, changed depending on the environment. Allelic combinations causing early or late heading dates usually did not favour high yield, whereas intermediate heading dates were associated with not only higher variability but also higher yield potential. To identify QTL for grain yield independent of heading date, the population was divided into three classes: Early, Intermediate and Late. We found three new QTL affecting yield only at specific maturity groups. The implications of these findings in relation to barley breeding are discussed.

show abstract

“…There is evidence, however, that secondary and interaction effects may also regulate these loci, i.e. photoperiod on VRN loci ( von Zitzewitz et al , 2005 ; Dubcovsky et al , 2006 ; Karsai et al , 2006 ; Szűcs et al , 2006 ; Trevaskis et al , 2006 ).…”

Section: Discussionmentioning

confidence: 99%

“…Photoperiod duration also affects ZCCT activity: a level of expression occurs under long, but not short photoperiods ( Dubcovsky et al , 2006 ; Trevaskis et al , 2006 ). The connection between photoperiod sensitivity and the allele phase of the VRN-H2 locus was also identified via functional QTL analyses ( Karsai et al , 2006 ). Trevaskis et al (2006) demonstrated that ZCCT-H gene expression levels fluctuate on a daily basis, suggesting that this gene is under circadian clock control.…”

Section: Discussionmentioning

confidence: 99%

Effects of photo and thermo cycles on flowering time in barley: a genetical phenomics approach

Karsaï

Szűcs

Kőszegi

et al. 2008

Journal of Experimental Botany

Self Cite

View full text Add to dashboard Cite

The effects of synchronous photo (16 h daylength) and thermo (2 °C daily fluctuation) cycles on flowering time were compared with constant light and temperature treatments using two barley mapping populations derived from the facultative cultivar ‘Dicktoo’. The ‘Dicktoo’×‘Morex’ (spring) population (DM) segregates for functional differences in alleles of candidate genes for VRN-H1, VRN-H3, PPD-H1, and PPD-H2. The first two loci are associated with the vernalization response and the latter two with photoperiod sensitivity. The ‘Dicktoo’×‘Kompolti korai’ (winter) population (DK) has a known functional polymorphism only at VRN-H2, a locus associated with vernalization sensitivity. Flowering time in both populations was accelerated when there was no fluctuating factor in the environment and was delayed to the greatest extent with the application of synchronous photo and thermo cycles. Alleles at VRN-H1, VRN-H2, PPD-H1, and PPD-H2—and their interactions—were found to be significant determinants of the increase/decrease in days to flower. Under synchronous photo and thermo cycles, plants with the Dicktoo (recessive) VRN-H1 allele flowered significantly later than those with the Kompolti korai (recessive) or Morex (dominant) VRN-H1 alleles. The Dicktoo VRN-H1 allele, together with the late-flowering allele at PPD-H1 and PPD-H2, led to the greatest delay. The application of synchronous photo and thermo cycles changed the epistatic interaction between VRN-H2 and VRN-H1: plants with Dicktoo type VRN-H1 flowered late, regardless of the allele phase at VRN-H2. Our results are novel in demonstrating the large effects of minor variations in environmental signals on flowering time: for example, a 2 °C thermo cycle caused a delay in flowering time of 70 d as compared to a constant temperature.

show abstract

The influence of photoperiod on the Vrn‐H2 locus (4H) which is a major determinant of plant development and reproductive fitness traits in a facultative × winter barley (Hordeum vulgare L.) mapping population

Cited by 19 publications

References 22 publications

Allelic variation of vernalization and photoperiod response genes in a diverse set of North American high latitude winter wheat genotypes

Allelic variation of vernalization and photoperiod response genes in a diverse set of North American high latitude winter wheat genotypes

Yield QTL affected by heading date in Mediterranean grown barley

Effects of photo and thermo cycles on flowering time in barley: a genetical phenomics approach

Contact Info

Product

Resources

About