Population‐dependent reproducible deviation from natural bread wheat genome in synthetic hexaploid wheat

2019 ◽  
Vol 100 (4) ◽  
pp. 801-812 ◽  
Author(s):  
Abdulqader Jighly ◽  
Reem Joukhadar ◽  
Deepmala Sehgal ◽  
Sukhwinder Singh ◽  
Francis C. Ogbonnaya ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Wheat Genome ◽  
Synthetic Hexaploid Wheat ◽  
Synthetic Hexaploid ◽  
Bread Wheat Genome

Registration of Five Synthetic Hexaploid Wheat and Seven Bread Wheat Lines Resistant to Wheat Spot Blotch

Crop Science ◽  
2001 ◽  
Vol 41 (5) ◽  
pp. 1653-1654 ◽  
Author(s):  
A. Mujeeb‐Kazi ◽  
S. Cano ◽  
V. Rosas ◽  
A. Cortes ◽  
R. Delgado
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Spot Blotch ◽  
Synthetic Hexaploid Wheat ◽  
Synthetic Hexaploid ◽  
Wheat Lines

A breeding strategy targeting the secondary gene pool of bread wheat: introgression from a synthetic hexaploid wheat

2019 ◽  
Vol 132 (8) ◽  
pp. 2285-2294 ◽  
Author(s):  
Ming Hao ◽  
Lianquan Zhang ◽  
Laibin Zhao ◽  
Shoufen Dai ◽  
Aili Li ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Gene Pool ◽  
Breeding Strategy ◽  
Synthetic Hexaploid Wheat ◽  
Synthetic Hexaploid

scholarly journals Genetic Contribution of Synthetic Hexaploid Wheat to CIMMYT’s Spring Bread Wheat Breeding Germplasm

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Umesh Rosyara ◽  
Masahiro Kishii ◽  
Thomas Payne ◽  
Carolina Paola Sansaloni ◽  
Ravi Prakash Singh ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Wheat Breeding ◽  
Synthetic Hexaploid Wheat ◽  
Genetic Contribution ◽  
Spring Bread Wheat ◽  
Synthetic Hexaploid ◽  
Breeding Germplasm

Use of synthetic hexaploid wheat to increase diversity for CIMMYT bread wheat improvement

2008 ◽  
Vol 59 (5) ◽  
pp. 413 ◽  
Author(s):  
S. Dreisigacker ◽  
M. Kishii ◽  
J. Lage ◽  
M. Warburton
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Phenotypic Expression ◽  
Germplasm Collection ◽  
Synthetic Hexaploid Wheat ◽  
Selection Marker ◽  
Wheat Cultivars ◽  
D Genome ◽  
Wheat Improvement ◽  
Synthetic Hexaploid

To date, the International Maize and Wheat Improvement Center (CIMMYT) has produced more than 1000 synthetic hexaploid wheats (SHWs), using diverse accessions of the D genome donor species (Aegilops tauschii). Many of these SHWs produced from many different Ae. tauschii have shown resistance or tolerance to various biotic and abiotic stresses, indicating the potential importance of the Ae. tauschii gene pool for breeding purposes. SHWs were backcrossed to CIMMYT improved germplasm to produce synthetic backcross-derived lines (SBLs), which are agronomically similar to the improved parents, but retain the introgressed traits of interest under selection and thereby new diversity. Molecular studies show that SHWs and SBLs are genetically diverse at the DNA level when compared with traditional bread wheat cultivars and preferential transmission of some alleles from the SHW parent has been seen in all genomes, indicating positive selection. Marker analyses of wheat cultivars released over time indicate that SBLs are ideal materials to simultaneously increase yield and diversity for other traits. Following successful diversification of the wheat D genome, CIMMYT has shifted to target improvement of hexaploid wheat via the A and B genomes, focusing on specific traits. Screening the CIMMYT germplasm collection of T. turgidum subsp. dicoccum for Russian wheat aphid resistance and drought tolerance revealed varying levels of phenotypic expression. Promising accessions will be used for the production of new SHWs for future introgressions into elite bread wheat backgrounds.

scholarly journals Effect of high-molecular-weight glutenin allele, Glu-B1d, from synthetic hexaploid wheat on wheat quality parameters and dry, white Chinese noodle-making quality

2010 ◽  
Vol 61 (4) ◽  
pp. 310 ◽  
Author(s):  
Yonglu Tang ◽  
Wuyun Yang ◽  
Yuanqi Wu ◽  
Chaosu Li ◽  
Jun Li ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Recombinant Inbred Lines ◽  
Quality Parameters ◽  
Synthetic Hexaploid Wheat ◽  
Wheat Quality ◽  
Glutenin Subunits ◽  
Synthetic Hexaploid

Synthetic hexaploid wheat (SHW) represents a valuable source of new resistances to a range of biotic and abiotic stresses. Exploitation of these resistances in bread wheat breeding programs, however, is not necessarily straightforward and requires an assessment of potential negative effects on quality particularly from the genomes contributed by the durum parents used in the development of SHW. In particular, high-molecular-weight glutenin subunits (HMW-GS) 6+8 that are common in durum and SHW but, in bread wheat, are present at only a very low frequency in Chinese wheat cultivars and landraces and as a result there is only limited data on the effects of HMW-GS 6+8 on wheat processing quality and especially on dry, white Chinese noodles (DWCN). In this study, 131 recombinant inbred lines (RIL) were developed from a cross between a CIMMYT SHW ‘Syn-CD780’ and an elite Sichuan common wheat cultivar ‘ChuanYu12’.The aim of this study was to investigate the effect of the HMW glutenin allele, Glu-B1d (6+8), from SHW on quality-related characteristics and DWCN making quality compared with the alternate allele Glu-B1u (7*+8). The RIL and parents were grown in three environments and analysed for 21 quality and noodle test parameters. Results showed the effect of Glu-B1d depended on both the parameters tested and glutenin subunit background contributed by alleles at the Glu-A1 and Glu-D1 loci. RIL with the Glu-B1d allele v. those with the Glu-B1u had significantly higher Zeleny sedimentation volume and falling number in the subunit backgrounds Glu-A1c/Glu-D1a and Glu-A1c/Glu-D1ah, significantly higher L* of dry flour in the background Glu-A1a/Glu-D1a; significantly higher dough development time, dough stability time, breakdown time and lower softness in both backgrounds Glu-A1c/Glu-D1a and Glu-A1c/Glu-D1ah; significantly higher values of most rapid visco analysis parameters, especially pronounced in the background Glu-A1c/Glu-D1a. The RIL with the Glu-B1d allele also showed significantly higher (P < 0.05) noodle total score (NTS) in the Glu-A1a/Glu-D1a background and significantly higher (P < 0.01) NTS and most components of sensory assessment in the Glu-A1c/Glu-D1a background. Overall, the results indicate that the allele Glu-B1d, 6+8, from synthetic hexaploids could, in general, have a positive influence on most bread wheat quality parameters and DWCN noodle-making, particularly when combined with particular glutenin subunits at Glu-A1 and Glu-D1.

Registration of 10 Synthetic Hexaploid Wheat and Six Bread Wheat Germplasms Resistant to Karnal Bunt

Crop Science ◽  
2001 ◽  
Vol 41 (5) ◽  
pp. 1652-1653 ◽  
Author(s):  
A. Mujeeb-Kazi ◽  
G. Fuentes-Davila ◽  
R.L. Villareal ◽  
A. Cortes ◽  
V. Roasas ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Karnal Bunt ◽  
Synthetic Hexaploid Wheat ◽  
Synthetic Hexaploid

Flanking SSR markers for alleles involved in the necrosis of hybrids between hexaploid bread wheat and synthetic hexaploid wheat

2017 ◽  
Vol 31 (6) ◽  
pp. 879-892
Author(s):  
D. R. Kandel ◽  
K. D. Glover ◽  
W. A. Berzonsky ◽  
J. L. Gonzalez-Hernandez ◽  
S. Ali ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Ssr Markers ◽  
Hexaploid Wheat ◽  
Synthetic Hexaploid Wheat ◽  
Synthetic Hexaploid

scholarly journals Additive genetic variance and covariance between relatives in synthetic wheat crosses with variable parental ploidy levels

Genetics ◽  
2021 ◽  
Vol 217 (2) ◽  
Author(s):  
L E Puhl ◽  
J Crossa ◽  
S Munilla ◽  
P Pérez-Rodríguez ◽  
R J C Cantet
Keyword(s):  
Hexaploid Wheat ◽  
Variance Components ◽  
Bayesian Model ◽  
Synthetic Hexaploid Wheat ◽  
Data Sets ◽  
Hierarchical Bayesian Model ◽  
Additive Variance ◽  
Ploidy Levels ◽  
Breeding Values ◽  
Synthetic Hexaploid

Abstract Cultivated bread wheat (Triticum aestivum L.) is an allohexaploid species resulting from the natural hybridization and chromosome doubling of allotetraploid durum wheat (T. turgidum) and a diploid goatgrass Aegilops tauschii Coss (Ae. tauschii). Synthetic hexaploid wheat (SHW) was developed through the interspecific hybridization of Ae. tauschii and T. turgidum, and then crossed to T. aestivum to produce synthetic hexaploid wheat derivatives (SHWDs). Owing to this founding variability, one may infer that the genetic variances of native wild populations vs improved wheat may vary due to their differential origin and evolutionary history. In this study, we partitioned the additive variance of SHW and SHWD with respect to their breed origin by fitting a hierarchical Bayesian model with heterogeneous covariance structure for breeding values to estimate variance components for each breed category, and segregation variance. Two data sets were used to test the proposed hierarchical Bayesian model, one from a multi-year multi-location field trial of SHWD and the other comprising the two species of SHW. For the SHWD, the Bayesian estimates of additive variances of grain yield from each breed category were similar for T. turgidum and Ae. tauschii, but smaller for T. aestivum. Segregation variances between Ae. tauschii—T. aestivum and T. turgidum—T. aestivum populations explained a sizable proportion of the phenotypic variance. Bayesian additive variance components and the Best Linear Unbiased Predictors (BLUPs) estimated by two well-known software programs were similar for multi-breed origin and for the sum of the breeding values by origin for both data sets. Our results support the suitability of models with heterogeneous additive genetic variances to predict breeding values in wheat crosses with variable ploidy levels.

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