Some Aspects of Photoperiodism in Wheat and Its Wild Relatives

1994 ◽  
Vol 21 (5) ◽  
pp. 551 ◽  
Author(s):  
LT Evans ◽  
C Blundell
Keyword(s):  
Spring Wheat ◽  
Hexaploid Wheat ◽  
Floral Induction ◽  
Wild Relatives ◽  
Controlled Environment ◽  
Dwarfing Genes ◽  
Near Isogenic Lines ◽  
Wheat Cultivars ◽  
Long Day ◽  
The Times

Experiments with plants grown in controlled environment conditions examine three aspects of photoperiodism in wheat. A survey of the flowering responses of 20 genotypes of diploid, tetraploid and hexaploid wheat cultivars and wild relatives to growth under three daylengths (8, 12, 16 h) after three durations of vernalisation (0, 4, 10 weeks at 20�C) showed that all were long-day plants and many responded to vernalisation. The requirement for long days was most stringent among the diploid progenitors and most relaxed among the hexaploid cultivars. However, not even the earliest flowering spring wheat cultivars (among eight) were entirely daylength-neutral. Minimum times to inflorescence initiation appeared to be determined independently of the responses to daylength. Whereas leaf initiation and appearance rates were hardly influenced by daylength, the rate of spikelet initiation responded to it from the beginning of floral induction, well before the appearance of double ridges. Comparison of the times to double ridges among near-isogenic lines of four spring wheat cultivars (Ciano 67, Yaqui 50, Rescue and April Bearded) showed that each of the three dwarfing genes Rht1, Rht2 and Rht3 advanced inflorescence initiation but without changing the response to daylength.

Developmental Responses by Tall and Dwarf Isogenic Lines of Spring Wheat to Applied Gibberellins.

1995 ◽  
Vol 22 (3) ◽  
pp. 365 ◽  
Author(s):  
LT Evans ◽  
C Blundell ◽  
RW King
Keyword(s):  
Spring Wheat ◽  
Floral Induction ◽  
Growth Retardant ◽  
Wheat Cultivars ◽  
Leaf Elongation ◽  
Isogenic Lines ◽  
Stems And Leaves ◽  
Developmental Responses ◽  
Stem Leaf ◽  
Do So

Tall (rht) and dwarf (Rht) isogenic lines of two Mexican spring wheat cultivars were grown at 25/20�C day/night in short (8 h) days of either natural or artificial light to determine their relative stem, leaf and flowering responses to one or two long days, 11 different gibberellins (GAs) and the growth retardant Cycocel (CCC). Although stem and leaf elongation in the dwarf lines did not respond to a GA application, inflorescence initiation and development was enhanced by several GAS, reduced by CCC, and restored by subsequent GA application. The floral response of tall lines to GAs was greater than that of the dwarf lines, whereas the reverse was the case with their exposure to long days. These results suggest that endogenous GAs are involved in the floral induction of wheat, and that although the stems and leaves of dwarf lines may not be able to respond to exogenous GAs, their shoot apices can do so and are sensitive to endogenous GA levels.

The reactions of Canadian spring wheat genotypes to inoculation with Claviceps purpurea, the causal agent of ergot

2004 ◽  
Vol 84 (2) ◽  
pp. 625-629 ◽  
Author(s):  
J. G. Menzies
Keyword(s):  
Key Words ◽  
Spring Wheat ◽  
Hexaploid Wheat ◽  
Triticum Turgidum ◽  
The Other ◽  
Claviceps Purpurea ◽  
Wheat Cultivars ◽  
Canadian Prairie ◽  
Wheat Genotypes ◽  
Wheat Lines

Ergot, caused by Claviceps purpurea, can be a detrimental pathogen of wheat because the sclerotia of this fungus are toxic to animals and humans. The purpose of this work was to determine if currently registered Canadian wheat cultivars and experimental wheat lines differ in their reactions to C. purpurea and to determine if different classes of wheat [Canadian Western Red Spring (CWRS), Canadian Prairie Spring (CPS), Canadian Western Extra Strong (CWES), Canadian Western Soft White Spring (CWSWS), and Canadian Western Amber Durum (CWAD)] differ in their levels of resistance. Fifty-four wheat genotypes from different western Canadian classes of wheat were inoculated with a mixture of six isolates of C. purpurea and assessed for the number of sclerotia produced per spike and rated for sclerotial size produced and the amount of honeydew produced. In general, CWAD wheats produced significantly fewer sclerotia per spike and the CWSWS wheats had significantly smaller sclerotia. None of the classes differed in honeydew production. One CWAD genotype, 9260B-173A, had the fewest sclerotia, and the lowest ratings for sclerotial size, and amount of honeydew produced compared to the other wheat genotypes tested. Key words: Hexaploid wheat, durum wheat, Triticum turgidum var. durum, T. aestivum, ergot, Claviceps purpurea, resistance, sclerotia size, honeydew

Compositional, thermal and water sorption properties of wheat flour: comparing wild-relatives v/s elite wheat varieties used in current plant breeding

2021 ◽  
Author(s):  
Deepa Agarwal ◽  
William MacNaughtan ◽  
Julie King ◽  
Tim J. Foster
Keyword(s):  
Plant Breeding ◽  
Wheat Flour ◽  
Water Sorption ◽  
Wild Relatives ◽  
Sorption Properties ◽  
Wheat Cultivars ◽  
Wheat Varieties ◽  
Functional Differences ◽  
Water Sorption Properties

This research investigate the structural and functional differences between four main wheat cultivars in comparison to the wild relatives of wheat. “Wheat image from www.freepik.com.”

scholarly journals Proteomic Determination of Low-Molecular-Weight Glutenin Subunit Composition in Aroona Near-Isogenic Lines and Standard Wheat Cultivars

2021 ◽  
Vol 22 (14) ◽  
pp. 7709
Author(s):  
Kyoungwon Cho ◽  
You-Ran Jang ◽  
Sun-Hyung Lim ◽  
Susan B. Altenbach ◽  
Yong Q. Gu ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Allelic Variation ◽  
Reversed Phase ◽  
Glutenin Subunit ◽  
Low Molecular Weight ◽  
Near Isogenic Lines ◽  
Wheat Cultivars ◽  
Reliable Determination ◽  
Isogenic Lines

The low-molecular weight glutenin subunit (LMW-GS) composition of wheat (Triticum aestivum) flour has important effects on end-use quality. However, assessing the contributions of each LMW-GS to flour quality remains challenging because of the complex LMW-GS composition and allelic variation among wheat cultivars. Therefore, accurate and reliable determination of LMW-GS alleles in germplasm remains an important challenge for wheat breeding. In this study, we used an optimized reversed-phase HPLC method and proteomics approach comprising 2-D gels coupled with liquid chromatography–tandem mass spectrometry (MS/MS) to discriminate individual LMW-GSs corresponding to alleles encoded by the Glu-A3, Glu-B3, and Glu-D3 loci in the ‘Aroona’ cultivar and 12 ‘Aroona’ near-isogenic lines (ARILs), which contain unique LMW-GS alleles in the same genetic background. The LMW-GS separation patterns for ‘Aroona’ and ARILs on chromatograms and 2-D gels were consistent with those from a set of 10 standard wheat cultivars for Glu-3. Furthermore, 12 previously uncharacterized spots in ‘Aroona’ and ARILs were excised from 2-D gels, digested with chymotrypsin, and subjected to MS/MS. We identified their gene haplotypes and created a 2-D gel map of LMW-GS alleles in the germplasm for breeding and screening for desirable LMW-GS alleles for wheat quality improvement.

Correlation of Deoxynivalenol Accumulation in Fusarium-Infected Winter and Spring Wheat Cultivars with Secondary Metabolites at Different Growth Stages

2016 ◽  
Vol 64 (22) ◽  
pp. 4545-4555 ◽  
Author(s):  
Thomas Etzerodt ◽  
Rene Gislum ◽  
Bente B. Laursen ◽  
Kirsten Heinrichson ◽  
Per L. Gregersen ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Spring Wheat ◽  
Growth Stages ◽  
Wheat Cultivars ◽  
Different Growth Stages

Genetic diversity of hexaploid wheat cultivars estimated by RAPD markers, morphological traits and coefficients of parentage

2004 ◽  
Vol 123 (4) ◽  
pp. 366-369 ◽  
Author(s):  
S. Maric ◽  
S. Bolaric ◽  
J. Martincic ◽  
I. Pejic ◽  
V. Kozumplik
Keyword(s):  
Genetic Diversity ◽  
Hexaploid Wheat ◽  
Morphological Traits ◽  
Rapd Markers ◽  
Wheat Cultivars
Sign in / Sign up

Export Citation Format

Share Document