scholarly journals Effects of photoperiod sensitivity genes Ppd-B1 and Ppd-D1 on spike fertility and related traits in bread wheat

2018 ◽  
Vol 137 (3) ◽  
pp. 320-325 ◽  
Author(s):  
Ignacio A. Ramirez ◽  
Pablo E. Abbate ◽  
Ignacio W. Redi ◽  
Ana C. Pontaroli
Keyword(s):  
Bread Wheat ◽  
Photoperiod Sensitivity ◽  
Photoperiod Sensitivity Genes

scholarly journals Effect of Ppd-1 photoperiod sensitivity genes on dry matter production and allocation in durum wheat

2018 ◽  
Vol 221 ◽  
pp. 358-367 ◽  
Author(s):  
Conxita Royo ◽  
Karim Ammar ◽  
Christian Alfaro ◽  
Susanne Dreisigacker ◽  
Luis Fernando García del Moral ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Dry Matter ◽  
Photoperiod Sensitivity ◽  
Dry Matter Production ◽  
Matter Production ◽  
Photoperiod Sensitivity Genes

scholarly journals Photoperiod sensitivity affects flowering duration in wheat

2016 ◽  
Vol 155 (1) ◽  
pp. 32-43 ◽  
Author(s):  
H. E. JONES ◽  
M. LUKAC ◽  
B. BRAK ◽  
M. MARTINEZ-EIXARCH ◽  
A. ALHOMEDHI ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Plant Architecture ◽  
Field Experiments ◽  
Strong Relationship ◽  
Photoperiod Sensitivity ◽  
Pleiotropic Effects ◽  
Wheat Line ◽  
Wheat Varieties ◽  
Flowering Duration

SUMMARYFlowering and successful pollination in wheat are key determinants of both quantity and quality of grain. Bread wheat line ‘Paragon’, introgressed with single or multiple daylength insensitivity alleles was used to dissect the effects on the timing and duration of flowering within a hierarchical plant architecture. Flowering of wheat plants was observed in a series of pot-based and field experiments. Ppd-D1a was the most potent known allele affecting the timing of flowering, requiring the least thermal time to flowering across all experiments. The duration of flowering for individual lines was dominated by the shift in the start of flowering in later tillers and the number of tillers per plant, rather than variation in flowering duration of individual spikes. There was a strong relationship between flowering duration and the start of flowering with the earliest lines flowering for the longest. The greatest flowering overlap between tillers was recorded for the Ppd-1b. Across all lines, a warmer environment significantly reduced the duration of flowering and the influence of Ppd-1a alleles on the start of flowering. These findings provide evidence of pleiotropic effects of the Ppd-1a alleles, and have direct implications for breeding for increased stress resilient wheat varieties.

Pre-anthesis development and number of fertile florets in wheat as affected by photoperiod sensitivity genes Ppd-D1and Ppd-B1

Euphytica ◽  
2006 ◽  
Vol 146 (3) ◽  
pp. 253-269 ◽  
Author(s):  
Fernanda G. González ◽  
Gustavo A. Slafer ◽  
Daniel J. Miralles
Keyword(s):  
Photoperiod Sensitivity ◽  
Photoperiod Sensitivity Genes

scholarly journals PCR-analysis of photoperiod sensitivity genes in bread wheat varieties from Bilatserkovska experimental breeding station

2019 ◽  
Vol 16 (2) ◽  
pp. 217-226
Author(s):  
V. M. Filimonov ◽  
A. A. Bakuma ◽  
G. A. Chebotar ◽  
L. A. Burdenyuk-Tarasevich ◽  
S. V. Chebotar
Keyword(s):  
Winter Wheat ◽  
Dna Isolation ◽  
Photoperiod Sensitivity ◽  
Pcr Analysis ◽  
Classification Methods ◽  
Wheat Varieties ◽  
Breeding Station ◽  
Allele Specific ◽  
Photoperiod Sensitivity Genes

The aim. Determination of alleles of the photoperiod sensitivity genes Ppd-1 in 16 winter wheat varieties of the Bilatserkovska Experimental Breeding Station and identification of the haplotypes of Ppd-D1 gene according to the accepted classification. Methods. DNA isolation, allele-specific and nested PCR, electrophoresis in agarose and polyacrylamide gels, determination of the significant differences in the time of heading. Results. Plants of the varieties Vodohrai bilotserkivs’kiy; Bilotserkivs’ka napivkarlykova, Olesia, Perlyna lisostepu, Elehiia, Yasochka, Lybid’, Tsarivna, Lisova pisnia, Romantyka, Vidrada, Schedra nyva, Charodiika bilotsekivs’ka, Russa, Driada 1 have the genotype PpdA1b Ppd-B1b Ppd-D1a and belong to the VII haplotype of the Ppd-D1 gene. The genotype of the variety Legenda bilotsekivs’ka is characterized by the presence of the alleles Ppd-A1b Ppd-B1b Ppd-D1b and belongs to the IV haplotype of the Ppd-D1 gene. The significant differences (P = 0.01) in the time of heading was detected only between the varieties Russa and Legenda bilotsekivs’ka and was 12.4 days. Conclusions. Most BEBS varieties are characterized by genotype — PpdA1b Ppd-B1b Ppd-D1a, in which the allele Ppd-D1a determines insensitivity to the photoperiod and leads to early heading. Only variety Legenda bilotsekivs’ka is the carrier of the recessive allele of Ppd-D1 gene, belongs to the IV haplotype, has the latest time of heading. Keywords: Ppd-A1, Ppd-B1, Ppd-D1 genes, winter wheat, PCR analysis, photoperiod sensitivity.

scholarly journals Photoperiod-sensitivity genes shape floret development in wheat

2018 ◽  
Vol 70 (4) ◽  
pp. 1339-1348 ◽  
Author(s):  
Thomas I Pérez-Gianmarco ◽  
Gustavo A Slafer ◽  
Fernanda G González
Keyword(s):  
Photoperiod Sensitivity ◽  
Photoperiod Sensitivity Genes

scholarly journals Photoperiod-sensitivity genes (Ppd-1): Quantifying their effect on the photoperiod response model in wheat

2019 ◽  
Author(s):  
Thomas I Pérez-Gianmarco ◽  
Alan D Severini ◽  
Fernanda G González
Keyword(s):  
Stem Elongation ◽  
Flag Leaf ◽  
Triticum Aestivum L ◽  
Photoperiod Sensitivity ◽  
Yield Potential ◽  
Photoperiod Response ◽  
Potential Development ◽  
Wide Range ◽  
Photoperiod Sensitive ◽  
Photoperiod Sensitivity Genes

Abstract Coupling anthesis date to the best environment is critical for wheat (Triticum aestivum L.) adaptation and yield potential. Development to anthesis is controlled by temperature and photoperiod. Response to photoperiod is chiefly modulated by Ppd-1 genes, but their effect on the quantitative response of i) time to anthesis, and ii) pre-anthesis phases to photoperiod remains largely unknown. A photoperiod-sensitive spring cultivar, Paragon, and near-isogenic lines of it carrying different combinations of Ppd-1a insensitivity alleles were tested under a wide range of photoperiods, including switches in photoperiod at the onset of stem elongation. Using multimodel inference we found that Ppd-1a alleles reduced photoperiod sensitivity from a) emergence to anthesis and b) emergence to onset of stem elongation, both in a less than additive manner, while threshold photoperiod and intrinsic earliness were unaffected. Sensitivity to current photoperiod from onset of stem elongation to flag leaf and from then to anthesis was milder than for previous phases and was not related to variability in Ppd-1. But ‘memory’ effects of previously experienced photoperiod on the duration from onset of stem elongation to flag leaf, was. The characterisation and quantification provided here of Ppd-1 allelic combinations’ effects on development should help increase genotype-to-phenotype models’ accuracy for predicting wheat phenology.

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