Breeding durum wheat in western Canada: Historical trends in yield and related variables

1995 ◽  
Vol 75 (1) ◽  
pp. 55-60 ◽  
Author(s):  
T. N. McCaig ◽  
J. M. Clarke
Keyword(s):  
Durum Wheat ◽  
Triticum Turgidum ◽  
Kernel Weight ◽  
Western Canada ◽  
Kernel Number ◽  
Historical Trends ◽  
Days To Maturity ◽  
Sink Demand ◽  
Over Time ◽  
Selection Of

Canadian durum wheat (Triticum turgidum L.) production is centred in the Brown and Dark Brown soil zones, areas of limited rainfall. For more than 50 yr, lines have been evaluated in the multi-location Durum Cooperative Test. Data from this test, over the period 1947–1992, were analyzed with the objectives of determining the advances that have been made within the Canada Western Amber Durum (CWAD) wheat class and comparing yield-related variables of recently registered cultivars with those of earlier cultivars. Canadian-developed cultivars have increased yields about 0.81% yr−1 relative to Hercules, or approximately 22.6 kg ha−1 yr−1. As kernel weight has remained unchanged, the genetic yield increases have resulted entirely from an increase in the number of kernels produced. Because kernel number is determined prior to, and during, anthesis, further yield increases may depend upon selection of genotypes that produce higher numbers of kernels, thereby increasing sink demand. While plant height and hectolitre weight have been decreasing over time, neither variable was significantly (P < 0.05) correlated with the yield increases that have taken place over the 29-yr period. The selection pressure toward shorter cultivars may have involved other agronomic advantages, such as decreased lodging. Days to maturity did not change significantly over time and was not correlated with yield. Key words:Triticum turgidum, kernel number, kernel weight, height, hectolitre weight

Temperature and precipitation effects on durum wheat grown in southern Saskatchewan for fifty years

1997 ◽  
Vol 77 (2) ◽  
pp. 215-223 ◽  
Author(s):  
T. N. McCaig
Keyword(s):  
Durum Wheat ◽  
Triticum Turgidum ◽  
Kernel Weight ◽  
Maximum Effect ◽  
Weather Variables ◽  
Kernel Number ◽  
Weather Factors ◽  
Brown Soil ◽  
Soil Zone ◽  
Semi Arid

Approximately 60% of Canadian durum wheat (Triticum turgidum L.) is produced in the semi-arid, Brown soil zone of southern Saskatchewan. The Durum Wheat Cooperative Test (DWCT) provides the means of evaluating potential new cultivars, and has been grown at Swift Current, located near the centre of the Brown soil zone in Saskatchewan, for more than 50 yr. Historical yield-related data from the DWCT were analyzed in conjunction with daily precipitation and maximum daily temperature (MaxDT) data with the objective of improving our understanding of the effects of these weather variables on durum wheat grown in this semi-arid region.The highest correlation between the weather variables and grain yield was during the period near the end of June through early July, approximately the time of anthesis. The correlation with kernel number m−2 (KNum) was maximum near the end of June, while the correlation with kernel weight was highest around the third week of July. The maximum effect of these weather factors in limiting yield in the Brown soil zone was through an impact on KNum around anthesis. Hectolitre weight and time-to-maturi-ty appeared to be influenced mainly by the weather in July, while crop height was determined by the weather near the end of June. An analysis which examined cumulative heat-units above threshold MaxDT of 20, 24, 28 and 32 °C indicated that temperatures >24 °C may be detrimental during early June although high temperatures are less common in June than in July. Yield was also negatively impacted by temperatures >20 °C during the first 3 wk of July.Future yield gains in this semi-arid region may be dependent upon the development of cultivars which are more tolerant of drought and high-temperature stress at anthesis. Key words: Triticum turgidum, kernel number, kernel weight, height, maturity, hectolitre weight

Transcend Durum wheat

2012 ◽  
Vol 92 (4) ◽  
pp. 809-813 ◽  
Author(s):  
A. K. Singh ◽  
J. M. Clarke ◽  
R. E. Knox ◽  
R. M. DePauw ◽  
T. N. McCaig ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Protein Concentration ◽  
Triticum Turgidum ◽  
Cadmium Concentration ◽  
Fusarium Head Blight Resistance ◽  
Head Blight ◽  
Canadian Prairies ◽  
Days To Maturity ◽  
Production Area ◽  
Concentration Test

Singh, A. K., Clarke, J. M., Knox, R. E., DePauw, R. M., McCaig, T. N., Fernandez, M. R. and Clarke, F. R. 2012. Transcend durum wheat. Can. J. Plant Sci. 92: 809–813. Transcend durum wheat [Triticum turgidum L. subsp. durum (Desf.) Husn.] is adapted to the durum production area of the Canadian prairies. It combines high grain yield, grain protein concentration, test weight, yellow grain and dough pigment, and low grain cadmium concentration. Transcend has strong straw, slightly more days to maturity, and improved Fusarium head blight resistance compared to Strongfield.

scholarly journals Evaluation of agronomic traits and assessment of genetic variability in some popular wheat genotypes cultivated in Saudi Arabia

2019 ◽  
pp. 847-856 ◽  
Author(s):  
Soleman M. Al-Otayk
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Plant Height ◽  
Bread Wheat ◽  
Coefficient Of Variation ◽  
Agronomic Traits ◽  
Kernel Weight ◽  
Wheat Genotypes ◽  
Days To Heading ◽  
Days To Maturity

The present study was carried out to evaluate agronomic traits and assessment of genetic variability of some wheat genotypes at Qassim region, Saudi Arabia', during 2010/11 and2011/12 seasons. Fourteen wheat genotypes including five bread wheat and nine durum wheat genotypes were evaluated in randomized complete block design with three replications. The genotypes were evaluated for ten different yield contributing characters viz., days to heading, days to maturity, grain filling period, grain filling rate, plant height, number of spikes m-2, kernels spike-1, 1000-kernel weight, grain yield and straw yield. The combined analysis of variance indicated the presence of significant differences between years for most characters. The genotypes exhibited significant variation for all the characters studied indicating considerable amount of variation among genotypes for each character. Maximum coefficient of variation was observed for number of spikes m-2 (17%), while minimum value was found for days to maturity. Four genotypes produced maximum grain yield and statistically similar, out of them two bread wheat genotypes (AC-3 and SD12) and the other two were durum wheat (AC-5 and BS-1). The genotypes AC-3, AC-5 and BS-1 had higher grain yield and stable in performance across seasons. The estimation of phenotypic coefficient of variation in all the traits studied was greater than those of the genotypic coefficient of variation. High heritability estimates (> 0.5) were observed for days to heading, days to maturity, and plant height, while the other characters recorded low to moderate heritability. The high GA % for plant height and days to heading (day) was accompanied by high heritability estimates, which indicated that heritability is mainly due to genetic variance. Comparatively high expected genetic advances were observed for grain yield components such as number of kernels spike-1 and 1000-kernel weight. Grain yield had the low heritability estimate with a relatively intermediate value for expected genetic advance. The results of principle component analysis (PCA) indicated that the superior durum wheat genotypes for grain yield in the two seasons (AC-5 and BS-1) are clustered in group II (Fig. 2). Also, the superior two bread wheat genotypes (AC-3 and SD12) were in group I. Therefore, it could be future breeding program to develop new high yielding genotypes in bread and durum wheat.

scholarly journals Effects of plant growth regulator applications on malting barley in western Canada

2020 ◽  
Vol 100 (6) ◽  
pp. 653-665
Author(s):  
B.D. Tidemann ◽  
J.T. O’Donovan ◽  
M. Izydorczyk ◽  
T.K. Turkington ◽  
L. Oatway ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Height ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Kernel Weight ◽  
Western Canada ◽  
Malting Barley ◽  
Seeding Rate ◽  
Malt Quality ◽  
Days To Maturity

Malting barley is important in western Canada, yet many malting cultivars do not meet malt quality standards, in part due to lodging. Lodging can decrease barley yield and quality thereby reducing the acceptability for malting. In other countries, plant growth regulator (PGR) applications are used to mitigate lodging. Chlormequat chloride (chlormequat), trinexapac-ethyl (trinexapac), and ethephon were tested at five locations over 3 yr in western Canada for their ability to limit lodging, as well as their effects on yield, agronomic traits, and pre-malt quality characteristics. PGR applications occurred between Zadoks growth stage (GS) 30–33 for chlormequat and trinexapac and GS 37–49 for ethephon. Seeding rates of 200, 300, and 400 seeds m−2 of CDC Copeland barley were used to increase the likelihood of lodging. Increased seeding rate decreased tillers per plant, height, days to maturity, kernel protein, and kernel weight. Ethephon increased the number of tillers per plant and decreased plant height, kernel plumpness, and kernel weight. Trinexapac decreased plant height and kernel weight. Days to maturity was investigated across site-years, with ethephon increasing maturity in 60% of comparisons. Trinexapac and chlormequat had limited effects on maturity. Lodging was investigated across site-years, with trinexapac showing the largest number of lodging reductions and scale of reductions. Ethephon reduced lodging in 36% of comparisons, while chlormequat had inconsistent effects. None of the products affected yield or grain protein. The results suggest PGRs may not be the solution to lodging for CDC Copeland barley on the Canadian Prairies; however, trinexapac shows the most promise of the products tested.

AAC Marchwell durum wheat

2015 ◽  
Vol 95 (1) ◽  
pp. 189-195 ◽  
Author(s):  
A. K. Singh ◽  
J. M. Clarke ◽  
R. E. Knox ◽  
R. M. DePauw ◽  
I. Wise ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Root Rot ◽  
Protein Concentration ◽  
Triticum Turgidum ◽  
Cadmium Concentration ◽  
Canadian Prairies ◽  
Common Root Rot ◽  
Days To Maturity ◽  
Production Area ◽  
End Use

Singh, A. K, Clarke, J. M., Knox, R. E., DePauw, R. M., Wise, I., Thomas, J., McCaig, T. N., Cuthbert, R. D., Clarke, F. R. and Fernandez, M.R. 2015. AAC Marchwell durum wheat. Can. J. Plant Sci. 95: 189–195. AAC Marchwell durum wheat [Triticum turgidum L. subsp. durum (Desf.) Husn.] is adapted to the durum production area of th Canadian prairies. AAC Marchwell is the first durum genotype registered for commercial production in Canada with the Sm1 gene for antibiosis-based resistance to orange wheat blossom midge [Sitodiplosis modellana (Gehin)]. It combines high grain yield, grain protein concentration, yellow pigment, test weight, and low grain cadmium concentration. AAC Marchwell has similar straw strength, plant height, and days to maturity as Strongfield. AAC Marchwell is resistant to leaf rust, stem rust, stripe rust, common bunt, loose smut, and common root rot. AAC Marchwell has end use quality suitable for the Canada Western Amber Durum class.

Physiology of genetic improvements in yield and grain protein of Canadian Western Amber Durum wheat

2009 ◽  
Vol 89 (3) ◽  
pp. 497-500 ◽  
Author(s):  
H. Wang ◽  
J. M. Clarke ◽  
T. N. McCaig ◽  
R. M. DePauw
Keyword(s):  
Durum Wheat ◽  
Nitrogen Uptake ◽  
Triticum Turgidum ◽  
Kernel Weight ◽  
Grain Protein ◽  
Reduced Height ◽  
Large Spike

Two relatively new Canada Western Amber Durum (CWAD) (Triticum turgidum L. var durum) cultivars used different strategies to increase yield and maintain high grain protein relative to older cultivars. AC Navigator (semi-dwarf) increased kernel weight and spikes per plant. AC Avonlea (conventional height) reduced height and increased spike size. AC Avonlea remobilized more nitrogen (N) to the grain than AC Navigator, which could be attributed to its large spike sink.Key words: Triticum turgidum, yield, protein, spike size, nitrogen uptake and remobilization

Awnedness affects grain yield and kernel weight in near-isogenic lines of durum wheat

2002 ◽  
Vol 53 (12) ◽  
pp. 1285 ◽  
Author(s):  
Rosella Motzo ◽  
Francesco Giunta
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Photosynthetic Capacity ◽  
Triticum Turgidum ◽  
Flag Leaf ◽  
Canopy Temperature ◽  
Leaf Size ◽  
Grain Filling ◽  
Kernel Weight ◽  
Severe Drought

The importance of awns in durum wheat (Triticum turgidum L. var. durum) has to be evaluated whenever an increase in grain yield is expected due to a greater photosynthetic capacity of the awned ear. Awned and awnless isolines of durum wheat were compared in a 3-year field trial in Sardinia (Italy). Ear and flag-leaf size, radiation interception, canopy temperature, yield, and yield components were measured.Awns increased the ear surface area from 36 to 59%, depending on their length, which ranged from 5.5 to 13.8 cm. This resulted in an average 4% more radiation intercepted by the awned ears. Canopy temperature was 0.9�C lower, on average, in the awned isolines, and was negatively correlated with kernel weight (r = –0.85**, n = 10), although consistent and marked effects of awns on canopy temperature were only observed in the long-awned lines. Awns positively affected grain yield, with an average increase of 10 and 16%, respectively, in the 2 years in which they affected kernel weight. The irrelevant effect of awns on yield in the year characterised by a severe drought was a consequence of their early desiccation.The effects of awns on grain yield and kernel weight strongly depend on the genetic background, on awn length and functionality, and on the environmental conditions during grain filling.

The use of a combination scoring index to improve durum productivity under drought stress

2019 ◽  
Vol 56 (2) ◽  
pp. 161-170 ◽  
Author(s):  
Reza Mohammadi
Keyword(s):  
Drought Stress ◽  
Durum Wheat ◽  
Kernel Weight ◽  
Stress Conditions ◽  
Severe Drought ◽  
Adaptive Traits ◽  
Wheat Genotypes ◽  
High Productivity ◽  
Selection Of ◽  
Scoring Index

AbstractBreeding for drought tolerance using novel genetic resources possessing relevant agronomic and adaptive traits is a key to enhance productivity and food security in wheat growing areas. Herein, the main objectives were (i) to use a combination scoring index (multiple scoring index, (MSI)) for selection of durum wheat genotypes under different drought stress intensities (SIs) (ii) to examine repeatability of the scoring index through bootstrap re-sample method, and (iii) to study the relationship of MSI with some drought-adaptive traits. Sixteen durum wheat genotypes were grown under rainfed and irrigated conditions during three cropping seasons (2012–2015), resulting in different drought SIs, that is, mild (SI < 0.3), moderate (0.3 < SI < 0.6), and severe (SI > 0.6). The average grain yields among test environments varied between 708 and 3631 kg ha−1. The validation of the methodology of scoring index was confirmed by the correlation coefficients between score indices and their original values across different drought SIs. According to MSI, the genotypes G16, G1, and G3 had the best combination of high productivity and high resilience to mild, moderate, and severe drought stress conditions, respectively. These results indicated that the ranking of genotypes varied among different drought SIs, which support the high potential of durum wheat for adaptation to different drought stress conditions. Based on the bootstrap samples, non-repeatable correlations were observed between the estimates of MSI from different levels of stress. The significant correlation between MSI with grain yield and 1000-kernel weight (TKW) under severe drought condition provides evidence that MSI ultimately be considered as a tool for effective selection of drought-tolerant genotypes. The MSI selected genotypes based on high productivity and resilience, to each level of drought SI, and favorable adaptive traits useful for breeding.

Inheritance of yellow pigment concentration in seven durum wheat crosses

2006 ◽  
Vol 86 (1) ◽  
pp. 133-141 ◽  
Author(s):  
F. R. Clarke ◽  
J. M. Clarke ◽  
T. N. McCaig ◽  
R. E. Knox ◽  
R. M. DePauw
Keyword(s):  
Durum Wheat ◽  
Environmental Effects ◽  
Triticum Turgidum ◽  
Kernel Weight ◽  
Yellow Pigment ◽  
Pigment Concentration ◽  
Quality Characteristic ◽  
Effective Factors ◽  
Selection Strategies ◽  
Age Related

Yellow pigment concentration of the endosperm due to the presence of xanthophyll and other related compounds is an important processing quality characteristic in durum wheat (Triticum turgidum L. var. durum). There is also interest in plant pigments for health reasons because lutein, a major component of durum grain pigment, may play a role in prevention of age-related macular degen eration. Selection for pigment concentration of durum wheat is thus an important breeding objective. Clarification of environmental effects and the mode of inheritance would aid planning of crosses and selection strategies to improve pigment concentration. This study evaluated seven durum wheat crosses of high by low pigment concentration parents in five field trials grown at two or more locations for 2 or more years in western Canada. Pigment concentration varied with environment. A portion of the variability could be ascribed to environmental effects on kernel weight, which tended to be negatively correlated with pigment concentration in some crosses and years (r = 0.08 to -0.49), but was not consistent. Inheritance of pigment concentration was multigenic as evidenced by bi-directional transgressive segregation and estimates of the number of effective factors controlling the trait. The number of effective factors varied with cross and environment, ranging from 3 to 27. Heritability of pigment concentration was high when measured in replicated, multi-location, multiyear trials, and ranged from 0.88 to 0.95, but lower (0.34) in an unreplicated segregating cross. The complex inheritance of pigment concentration means that other genetic tools, such as DNA markers, will be required to improve choice of parents for crossing and selection strategies in breeding programs. Key words: Durum wheat (Triticum turgidum L. var. durum), pigment concentration, inheritance, environment

Inheritance of supernumerary spikelets in a tetraploid wheat cross

Genome ◽  
1990 ◽  
Vol 33 (4) ◽  
pp. 509-514 ◽  
Author(s):  
D. L. Klindworth ◽  
N. D. Williams ◽  
L. R. Joppa
Keyword(s):  
Durum Wheat ◽  
Triticum Turgidum ◽  
Major Gene ◽  
Tetraploid Wheat ◽  
Recessive Gene ◽  
Substitution Line ◽  
Minor Genes ◽  
Branched Spike ◽  
Supernumerary Spikelets ◽  
Selection Of

The supernumerary spikelet (SS) trait of durum wheat (Triticum turgidum L.), including the four-rowed and ramified spike types, is characterized by an increased number of spikelets per spike. To determine the inheritance of this trait, the tetraploid ramified spike cultivar PI349056 was crossed reciprocally to normal-spike 'Langdon' durum, and the F1 was backcrossed to each parent. The F1, F2, F3, BC1F1, and BC1F2 were classified for SS expression. Additionally, PI349056 was crossed to the 'Langdon' 2D(2A) disomic substitution line to study linkage of SS genes. The SS trait was recessive to normal spike, and both four-rowed spike and ramified spike progeny were observed in the segregating generations. Segregation in F3 and BC1F2 families indicated that SS in PI349056 was quantitatively inherited, controlled by a major recessive gene and numerous minor genes. Normal-spiked plants selected in families homozygous for the major gene indicated that the major gene did not produce SS when the minor genes were absent. Selection of normal-spiked plants in the F3 and F4 of 'Langdon' 2D(2A) disomic substitution/PI349056 indicated that the minor SS genes were not linked to the major gene on chromosome 2A.Key words: Triticum, branched spike, ramified spike, four-rowed spike.

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