Targeted resurrection of chromosomal arm 1RS in two elite wheat lines with 1BL/1RS translocation for improved end-use quality

1BL/1RS translocation is widely used around the world to enhance wheat yield potential, resistance to various diseases, and adaptation. However, the translocation is combined with inherent quality problems associated with reduced dough strength and dough stickiness due to the presence of Sec-1 on proximal end and absence of GluB3/GliB1 on distal end. Two NILs, one carrying the distal (1RSRW) and the other carrying the proximal (1RSWR) fragment from 1BS, in background of Pavon were used for transferring these two loci in yellow rust resistant version of two elite wheat varieties PBW550+Yr5 and DBW17+Yr5. Foreground and background marker assisted selection was done for the Sec-1- and GluB3+ alongwith Lr26/Yr9/Sr31, Pm8 and 1RS loci in the advancing generation. BC2F5:6 NILs with absence of Secalin and presence of GluB3/GliB1 loci were evaluated for two years in replicated yield trial. A positive correlation of thousand grain weight (TGW), harvest index (HI), and tiller number per meter (TNpM) with yield (YD) with significant GxE effect was observed. Further multivariate analysis of these traits contributed maximum to the effective yield. Thirty promising NILs were identified with Sec-1-/GluB3+ alongwith with high yield contributing parameters.

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An assessment of wheat yield sensitivity and breeding gains in hot environments

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2012.2190 ◽

2013 ◽

Vol 280 (1752) ◽

pp. 20122190 ◽

Cited By ~ 62

Author(s):

Sharon M. Gourdji ◽

Ky L. Mathews ◽

Matthew Reynolds ◽

José Crossa ◽

David B. Lobell

Keyword(s):

Heat Tolerance ◽

Wheat Yield ◽

Vapour Pressure Deficit ◽

Grain Filling ◽

Yield Potential ◽

High Yield ◽

Genetic Gains ◽

Yield Trial ◽

Hot Environments ◽

Over Time

Genetic improvements in heat tolerance of wheat provide a potential adaptation response to long-term warming trends, and may also boost yields in wheat-growing areas already subject to heat stress. Yet there have been few assessments of recent progress in breeding wheat for hot environments. Here, data from 25 years of wheat trials in 76 countries from the International Maize and Wheat Improvement Center (CIMMYT) are used to empirically model the response of wheat to environmental variation and assess the genetic gains over time in different environments and for different breeding strategies. Wheat yields exhibited the most sensitivity to warming during the grain-filling stage, typically the hottest part of the season. Sites with high vapour pressure deficit (VPD) exhibited a less negative response to temperatures during this period, probably associated with increased transpirational cooling. Genetic improvements were assessed by using the empirical model to correct observed yield growth for changes in environmental conditions and management over time. These ‘climate-corrected’ yield trends showed that most of the genetic gains in the high-yield-potential Elite Spring Wheat Yield Trial (ESWYT) were made at cooler temperatures, close to the physiological optimum, with no evidence for genetic gains at the hottest temperatures. In contrast, the Semi-Arid Wheat Yield Trial (SAWYT), a lower-yielding nursery targeted at maintaining yields under stressed conditions, showed the strongest genetic gains at the hottest temperatures. These results imply that targeted breeding efforts help us to ensure progress in building heat tolerance, and that intensified (and possibly new) approaches are needed to improve the yield potential of wheat in hot environments in order to maintain global food security in a warmer climate.

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Biggar red spring wheat

Canadian Journal of Plant Science ◽

10.4141/cjps91-073 ◽

1991 ◽

Vol 71 (2) ◽

pp. 519-522 ◽

Cited By ~ 7

Author(s):

R. M. DePauw ◽

K. R. Preston ◽

T. F. Townley-Smith ◽

E. A. Hurd ◽

G. E. McCrystal ◽

...

Keyword(s):

Triticum Aestivum ◽

Spring Wheat ◽

Triticum Aestivum L ◽

Yield Potential ◽

High Yield ◽

Flour Milling ◽

Wide Adaptation ◽

Cultivar Description ◽

End Use ◽

Milling Properties

Biggar red spring wheat (Triticum aestivum L.) combines high grain yield potential with semidwarf stature and wide adaptation. Biggar has improved end-use suitability relative to HY320 such as harder kernels, better flour milling properties, greater water absorption, and stronger gluten properties. It received registration No. 3089 and is eligible for grades of Canada Prairie Spring (red). Key words: Triticum aestivum, wheat (spring), high yield, cultivar description

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Development of new bread wheat resistant mutants for Ug99 rust disease (Puccinia graminis f. sp. tritici).

10.1079/9781789249095.0032 ◽

2021 ◽

pp. 312-319

Author(s):

Abdulwahid Saif ◽

Aref Al-Shamiri ◽

Abdulnour Shaher

Keyword(s):

Bread Wheat ◽

Adult Stage ◽

Yellow Rust ◽

Seedling Stage ◽

Yield Potential ◽

Growth Stages ◽

Rust Disease ◽

Wheat Varieties ◽

Rust Diseases ◽

Mutant Lines

Abstract M3 derived mutants from two bread wheat varieties, namely, 'Giza 186' and 'Saha 93', were screened for resistance to the rust Ug99 at two locations in Njoro (Kenya) and in Tihama (Yemen). At Tihama, two mutants of 'Giza 186' (G-M2-2010-1-28 and G-M2-2010-41-52) and four mutants of 'Saha 93' (S-M2-2010-16-12, S-M2-2010-21-13, S-M2-2010-22-14 and S-M2-2010-27-15) were seen to be resistant at both seedling and adult stages while their parents were resistant at seedling stage and susceptible at adult stage. In Kenya, the resistance score of the mutants was slightly different from those obtained at Tihama. The mutants G-M2-2010-1-28 and G-M2-2010-41-52 were stable in their level of resistance recorded at Tihama, but only two mutants of 'Saha 93' (S-M2-2010-16-12 and S-M2-2010-27-15) were resistant at both growth stages. S-M2-2010-22-14 and S-M2-2010-21-13 were resistant at the seedling stage while susceptible at adult stage. Further selection on these mutants for yield potential, agronomic performance and yellow rust disease resistance, as well as on selected mutants of both 'Giza 186' and 'Saha 93', at M5-M6 stages identified superior mutant lines compared with the two parents 'Saha 93' and 'Giza 186'. These included the line Erra-010-GM2w-41-52-40, which ranked first in yield (3768 kg/ha), followed by the lines Erra-010-SwM2-16-12-19, Erra-010-GM2w-1-28-18 and Erra-010-SwM2-22-14-6. Moreover, it can be concluded that Erra-010-GM2w-41-52-40 and Erra-010-SwM2-16-12-19 are highly recommended for their resistance to stem and yellow rust diseases as well as for yield potential and preference by farmers. Therefore, efforts are in progress to increase their seeds for dissemination over a wide range of farmers and wheat areas where rust diseases are an epidemic, and for registration of the lines as improved mutant varieties.

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Coleman hard red spring wheat

Canadian Journal of Plant Science ◽

10.4141/cjps-2015-111 ◽

2015 ◽

Vol 95 (5) ◽

pp. 1037-1041 ◽

Cited By ~ 1

Author(s):

D. Spaner ◽

A. Navabi ◽

K. Strenzke ◽

M. Iqbal ◽

B. Beres

Keyword(s):

Spring Wheat ◽

Fusarium Head Blight Resistance ◽

Yield Potential ◽

High Yield ◽

Head Blight ◽

Lodging Resistance ◽

Hard Red Spring Wheat ◽

Wheat Market ◽

End Use ◽

Contamination Levels

Spaner, D., Navabi, A., Strenzke, K., Iqbal, M. and Beres, B. 2015. Coleman hard red spring wheat. Can. J. Plant Sci. 95: 1037–1041. ‘Coleman’ hard red spring wheat is an awned, hollow-stemmed cultivar of high yield potential adapted to the wheat growing regions of western Canada. Averaged over 30 site-years, during 3 yr of testing in the Parkland Wheat Cooperative Registration Test (2010–2012), Coleman was higher yielding than Katepwa (8.5%) (P≤0.05), AC Splendor (5.8%) (P≤0.05), CDC Teal (2.1%) and CDC Osler (2%), exhibited maturity, height and lodging resistance similar to, or in the range of the checks, had higher test weights than the checks and showed good resistance to leaf, stem and stripe rust. Coleman exhibited Fusarium head blight resistance greater than and DON contamination levels lower than the check cultivars. Coleman exhibited susceptible reactions to common bunt and loose smut. End-use quality attributes of Coleman meet the specifications of the Canada Western Red Spring (CWRS) wheat market class.

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Short Communication: Selection of doubled haploid lines of rainfed lowland rice in preliminary yield trial

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d201003 ◽

2019 ◽

Vol 20 (10) ◽

Author(s):

Miftahur Rizqi Akbar ◽

Bambang Sapta Purwoko ◽

Iswari Saraswati Dewi ◽

Willy Bayuardi Suwarno ◽

Sugiyanta

Keyword(s):

Doubled Haploid ◽

Short Communication ◽

Lowland Rice ◽

Yield Potential ◽

High Yield ◽

Agronomic Characters ◽

Doubled Haploid Lines ◽

Yield Trial ◽

Rainfed Lowland ◽

Selection Of

Abstract. Akbar MR, Purwoko BS, Dewi IS, Suwarno WB, Sugiyanta. 2019. Short Communication: Selection of doubled haploid lines of rainfed lowland rice in preliminary yield trial. Biodiversitas 20: 2796-2801. Yield trial is an important step in rice breeding program. This research was aimed at evaluating agronomic characters and selecting the best doubled haploid rainfed rice lines for next advanced yield trial. An experiment was conducted in Indramayu from March to August 2017. The research was arranged in randomized complete block design (RCBD) with three replications. Materials used were fifty-eight doubled haploid lines and two check varieties namely Ciherang and Inpari 18. The results revealed that all observed characters had broad genetic variability and high heritability. The number of productive tillers and the number of filled grains per panicle had a positive correlation and direct effect on productivity. Based on index selection, thirty lines were selected to have good agronomic characters and high yield. These lines had characteristics of plant height (85.7-124.7 cm), number of productive tillers (8.6-14.8 tillers), day to harvest (104.0-117.3 days), number of filled grains per panicle (136.7-264.7 grains), number of total grains per panicle (152.0-305.7 grains), weight of 1000 grain (21.5-31.3 g), and productivity (4.1-6.8 tons ha-1). Keywords: good agronomic trait, high yield potential, selection index

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Foliar fungicide application as management strategie to minimize the growing threat of yellow rust on wheat in Portugal

Emirates Journal of Food and Agriculture ◽

10.9755/ejfa.2018.v30.i9.1793 ◽

2018 ◽

pp. 715

Author(s):

Conceição Gomes, Ana Sofia Almeida, José Coutinho, Rita Costa, Nuno Pinheiro ◽

João Coco, Armindo Costa, Ana Sofia Bagulho and Benvindo Maçãs

Keyword(s):

Durum Wheat ◽

Field Experiments ◽

Escape Behavior ◽

Puccinia Striiformis ◽

Yellow Rust ◽

Wheat Yield ◽

Genetic Resistance ◽

Kernel Weight ◽

Wheat Varieties ◽

Fungicide Application

Yellow rust caused by Puccinia striiformis f. sp. tritici, is a foliar wheat disease that cause significant yield losses in Portuguese bread and durum wheat yield, mainly in recent years. The strategies to disease control include cultural practices (crop rotation, use of balanced fertilizers, framework of planting dates), use of resistant varieties and fungicide application. The concern of modern plant breeding has been the improvement of new varieties with escape behavior to diseases and/or genetic resistance, but currently, the use of chemical produts offers a pratical and rapid response solution to combat rust outbreaks. In the present study, field experiments were conducted from 2013/2014 to 2016/2017 growing seasons to evaluate: 1) resistance levels against yellow rust in some bread and durum wheat varieties widely used by Portuguese farmers; 2) the opportunity of application of fungicide in the control of Puccinia striiformis in two stages of plant development; 3) gains obtained in each situation in yield and thousand kernel weight (TKW) compared to the control without fungicide application. This study allows to conclude that the need to use fungicide sprays it´s related not only on the carry over of rust inoculum in crop, but also of the races/strains of P. striiformis occurring in a region, the crop growth stage at time of symptom appearance and on variety level of resistance.

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Evaluation of advance bread Wheat lines in preliminary Wheat yield trial

Pure and Applied Biology ◽

10.19045/bspab.2015.43014 ◽

2015 ◽

Vol 4 (3) ◽

pp. 383-388

Author(s):

Fahim Ullah Khan

Keyword(s):

Bread Wheat ◽

Wheat Yield ◽

Yield Trial ◽

Wheat Lines

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Drought resistance of spring wheat varieties

Mongolian Journal of Agricultural Sciences ◽

10.5564/mjas.v28i03.1301 ◽

2019 ◽

Vol 28 (03) ◽

pp. 56-60

Author(s):

Ganbaatar B ◽

Batbold S

Keyword(s):

Drought Tolerance ◽

Grain Yield ◽

Drought Resistance ◽

Productivity Index ◽

Yield Potential ◽

High Yield ◽

Tolerance Index ◽

Wheat Varieties ◽

Drought Tolerant ◽

High Yield Potential

Selection for drought tolerance typically involves evaluating genotypes for either high yield potential or stable performance under drought stress. In order to select drought tolerant varieties of bread wheat an experiment was conducted in a randomized complete block design (RCBD) with two replications during the growing season 2014-2018. Eight drought tolerance indices including stress tolerance index (STI), geometric mean productivity (GMP), mean productivity index (MP), stress susceptibility index (SSI), tolerance index (TOL), yield index (YI), yield stability index (YSI) and drought resistance index (DI) were calculated and adjusted based on grain yield under drought years (Ys) and favorable years (Yp). Result of study showed significant positive correlation between grain yield in the stress condition (Ys) with indicators STI, GMP, TOL, MP, and DI, accordingly they are discriminating drought tolerant genotypes at the same manner. Wheat varieties Darkhan-172, Darkhan-72, Altaiskaya-325, Altaiskaya-70, Darkhan-181 has a high yield potential. Genotypes Darkhan-160, Arvin, Darkhan-144 most droughts tolerant and can be use in wheat breeding for improving drought resistance. Зусах зөөлөн буудайн сортуудыг ган тэсвэрийнүнэлэмжээр үнэлсэн дүнгээс Судалгаагаар манай оронд өргөн тариалагдаж байгаа өөрийн орны селекцээр гаргасан болон гадаадын нийт 20 сортонд ган тэсвэрийн индекс:стресс тэсвэрийн индекс (SТI), тэсвэрийн индекс (TOL),стресс мэдрэмжийн индекс (SSI), ган тэсвэрийн индекс (DI)-ээрүнэлгээ өгсөн. Зусах зөөлөн буудайн ургац ба ган тэсвэрийн индексүүдийн хооронд эерэг нягт хамааралыг тогтоосон. Чийгийн хангамж сайтай жилд потенциаль ургацаар буудайн эртийн болцтой Дархан-172, дунд-эртийн болцтой Дархан-72, Алтайская-325, Алтайская-70, дунд оройн болцтой Дархан-181 сортууд шалгарсан ба эдгээр сортуудыг селекцид хагас эрчимжсэн сорт гаргахад ашиглаж болно. Ган тэсвэр өндөртэй сортыг бий болгоходселекцид эртийн болцтой Дархан-160, дунд-эртийн болцтой Арвин, дунд оройн болцтой Дархан-144 сортуудыг эх материалаар ашиглаж болно. Зусах буудайн Дархан-144 сорт нь гадаад орчны нөхцөлд дасан зохицох чадвар сайтай сортоор шалгарав. Түлхүүр үг: болц,сорт, ургац, стресс, индекс

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Indirect selection for grain yield in spring bread wheat in diverse nurseries worldwide using parameters locally determined in north-west Mexico

The Journal of Agricultural Science ◽

10.1017/s0021859611000426 ◽

2011 ◽

Vol 150 (1) ◽

pp. 23-43 ◽

Cited By ~ 3

Author(s):

M. GUTIERREZ ◽

M. P. REYNOLDS ◽

W. R. RAUN ◽

M. L. STONE ◽

A. R. KLATT

Keyword(s):

High Temperature ◽

Grain Yield ◽

Wheat Yield ◽

Spring Bread Wheat ◽

Yield Performance ◽

North West ◽

Yield Trial ◽

West Mexico ◽

Wheat Lines ◽

Yield Trials

SUMMARYThe relationships of normalized water index three (NWI-3) and canopy temperature (CT) with grain yield in north-west Mexico were determined in a set of wheat lines planted in multi-location yield trials. Advanced wheat lines developed by The International Maize and Wheat Improvement Centre (CIMMYT) were included and tested internationally in the trials including the 24th Elite Spring Wheat Yield Trial (ESWYT), the 11th Semi-Arid Wheat Yield Trial (SAWYT) and the 11th High Temperature Wheat Yield Trial (HTWYT). In north-west Mexico, NWI-3, CT and grain yield were determined in three growing seasons (2006, 2007 and 2008) and three environments (well irrigated, water-stressed and high-temperature), while grain yield was measured at international locations in the same advanced lines of the 24th ESWYT, the 11th SAWYT and the 11th HTWYT . The CIMMYT database was used to obtain grain yield from worldwide nurseries. The mean grain yield ranged from 0·8 to 12·7 t/ha for the 24th ESWYT (59 international sites), from 0·6 to 8·2 t/ha for the 11th SAWYT (28 international sites) and from 0·4 to 7·5 t/ha for the 11th HTWYT (26 international sites). NWI-3 and CT for the advanced lines in the three yield trials measured in north-west Mexico in distinct environments showed significant associations with the grain yield from a few international locations (0·12–0·23 of sites). Locations from Central Asia and North Africa had the best associations with NWI-3 and CT. The lack of more associations may be due to either an interaction of other factors (low rainfall and limited irrigations), which affected yield performance, or few of the advanced lines were well adapted to local growing conditions at each testing site, or a combination of these factors. The present results indicate that NWI-3 and CT have limited potential to predict yield performance at international sites.

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