Introgression of an intermediate VRNH1 allele in barley (Hordeum vulgare L.) leads to reduced vernalization requirement without affecting freezing tolerance

Casao, M. Cristina; Igartua, Ernesto; Karsaï, I.; Bhat, Prasanna R.; Cuadrado, Noelia; Gracia, María Pilar Rivero; Lasa, J. M.; Casas, Ana M.

doi:10.1007/s11032-010-9497-y

Cited by 24 publications

(16 citation statements)

References 37 publications

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“…The first intron is similar to the HvVRN1-4 allele of Hemming et al (2009) but it contains an additional 7-bp deletion (GenBank accession DQ492705). Under controlled conditions it behaves like the Spanish landrace SBCC058 (Casao et al 2011b). The RIL population was developed in Lleida and, therefore, its rather warm temperatures may have shifted the population towards an overrepresentation of the Orria allele at VrnH1, resulting in the skewed allelic frequencies observed in the linkage group 5H.3.…”

Section: Discussionmentioning

confidence: 99%

Quantitative trait loci for agronomic traits in an elite barley population for Mediterranean conditions

et al. 2013

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Advances in plant breeding through marker-assisted selection (MAS) are only possible when genes or quantitative trait loci (QTLs) can contribute to the improvement of elite germplasm. A population of recombinant inbred lines (RILs) was developed for one of the best crosses of the Spanish National Barley Breeding Program, between two six-row winter barley cultivars Orria and Plaisant. The objective of this study was to identify favourable QTLs for agronomic traits in this population, which may help to optimise breeding strategies for these and other elite materials for the Mediterranean region. A genetic linkage map was developed for 217 RILs, using 382 single nucleotide polymorphism markers, selected from the barley oligonucleotide pool assay BOPA1 and two genes. A subset of 112 RILs was evaluated for several agronomic traits over a period of 2 years at three locations, Lleida and Zaragoza (Spain) and Fiorenzuola d'Arda (Italy), for a total of five field trials. An important segregation distortion occurred during population development in the region surrounding the VrnH1 locus. A QTL for grain yield and length of growth cycle was also found at this locus, apparently linked to a differential response of the VrnH1 alleles to temperature. A total of 33 QTLs was detected, most of them for important breeding targets such as plant height and thousand-grain weight. QTL 9 environment interactions were prevalent for most of the QTLs detected, although most interactions were of a quantitative nature. Therefore, QTLs suitable for MAS for most traits were identified.

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Section: Discussionmentioning

confidence: 99%

Quantitative trait loci for agronomic traits in an elite barley population for Mediterranean conditions

et al. 2013

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“…Also, care should be taken to ascertain the agronomic effects of possible adaptation syndromes that have been selected for in the landraces over time, affecting at the genes of the vernalization and photoperiod pathways (Casao et al. ,b). Ongoing work using genome‐wide association mapping and linkage mapping approaches with biparental populations derived from the best Spanish lines (Silvar et al.…”

Section: Discussionmentioning

confidence: 99%

Spanish barley landraces outperform modern cultivars at low‐productivity sites

et al. 2014

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Barley landraces from the western Mediterranean area have not been thoroughly exploited by modern breeding. This study aims at assessing the agronomic value of a core collection of lines derived from landraces of Spanish origin and to compare them with sets of successful old and modern cultivars. The agronomic performance of a set of 175 barley genotypes, comprising 159 landrace-derived lines and 26 cultivars, was evaluated in a series of 10 field trials, carried out over 3 years and several locations. The most relevant trait of the landraces was higher grain yield at low production sites than cultivars, which may be related with better ability to fill the grain under stressful conditions. On the other hand, lateness, excessive plant height and lodging were negative traits frequently found in the landraces. Large genotype-by-environment interaction (GEI) for grain yield was detected, related partly with differences between germplasm groups, probably indicating local adaptation. GEI was also associated with the interaction of heading time and powdery mildew resistance with temperature. Material and MethodsPlant material: A total of 182 genotypes were evaluated in field trials. The set comprised the following subsets: 145 six-row and 11 two-row This research was carried out at EEAD-CSIC, ITACyL-Valladolid and IRTA/UdL-Lleida. Spanish inbred lines, derived from landraces after at least three generations of head-to-row purification; sixteen old cultivars, widely used in Spain during the 20th century, eight two-row (Alpha, Beka, Hassan, Kym, Pallas, Union, Wisa and Zaida) and eight six-row (Ager, Albacete, Almunia, Barberousse, Dobla, Hatif de Grignon, Monlon and Pan e); and, finally, 10 cultivars, recently bred or currently grown in Spain, used as controls of good agronomic performance (Candela, Orria, Plaisant and Steptoe six-row; Gaelic, Graphic, Nevada, Seira, Tipper and Volga two-row). The first three groups, six-row and two-row landracederived inbred lines and old cultivars, constitute the Spanish Barley Core Collection (SBCC; Igartua et al. 1998).

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“…Trevaskis et al. (2006) and Casao et al. (2011) have shown that in winter barley, Vrn‐H1 only indirectly controls HvFT levels through the down‐regulation of Vrn‐H2 , which is a repressor of HvFT1 .…”

Section: Discussionmentioning

confidence: 99%

Functional characterisation of HvCO1, the barley (Hordeum vulgare) flowering time ortholog of CONSTANS

et al. 2012

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SUMMARYVariation in photoperiod response is a major factor determining plant development and the agronomic performance of crops. The genetic control of photoperiodic flowering has been elucidated in the model plant Arabidopsis, and many of the identified genes are structurally conserved in the grasses. In this study, HvCO1, the closest barley ortholog of the key photoperiod response gene CONSTANS in Arabidopsis, was over-expressed in the spring barley Golden Promise. Over-expression of HvCO1 accelerated time to flowering in long-and short-day conditions and caused up-regulation of HvFT1 mRNA under long-day conditions. However, the transgenic plants retained a response to photoperiod, suggesting the presence of photoperiod response factors acting downstream of HvCO1 transcription. Analysis of a population segregating for HvCO1 over-expression and natural genetic variation at Ppd-H1 demonstrated that Ppd-H1 acts downstream of HvCO1 transcription on HvFT1 expression and flowering. Furthermore, variation at Ppd-H1 did not affect diurnal expression of HvCO1 or HvCO2. Over-expression of HvCO1 increased transcription of the spring allele of Vrn-H1 in long-and short-day conditions, while genetic variation at Ppd-H1 did not affect Vrn-H1 expression. Over-expression of HvCO1 and natural genetic variation at Ppd-H1 accelerated inflorescence development and stem elongation. Thus, HvCO1 probably induces flowering by activating HvFT1 whilst Ppd-H1 regulates HvFT1 independently of HvCO1 mRNA, and all three genes also appear to have a strong effect in promoting inflorescence development.

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Introgression of an intermediate VRNH1 allele in barley (Hordeum vulgare L.) leads to reduced vernalization requirement without affecting freezing tolerance

Cited by 24 publications

References 37 publications

Quantitative trait loci for agronomic traits in an elite barley population for Mediterranean conditions

Quantitative trait loci for agronomic traits in an elite barley population for Mediterranean conditions

Spanish barley landraces outperform modern cultivars at low‐productivity sites

Functional characterisation of HvCO1, the barley (Hordeum vulgare) flowering time ortholog of CONSTANS

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