Long-term association of locations for testing spring bread wheat

Euphytica ◽  
1993 ◽  
Vol 72 (1-2) ◽  
pp. 95-106 ◽  
Author(s):  
I. H. DeLacy ◽  
P. N. Fox ◽  
J. D. Corbett ◽  
J. Crossa ◽  
S. Rajaram ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Spring Bread Wheat ◽  
Testing Spring

scholarly journals Genome-Wide Association and Prediction of Male and Female Floral Hybrid Potential Traits in Elite Spring Bread Wheat Genotypes

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 895
Author(s):  
Samira El Hanafi ◽  
Souad Cherkaoui ◽  
Zakaria Kehel ◽  
Ayed Al-Abdallat ◽  
Wuletaw Tadesse
Keyword(s):  
Genomic Selection ◽  
Bread Wheat ◽  
Genome Wide Association ◽  
Hybrid Breeding ◽  
Floral Traits ◽  
Phenotypic Variance ◽  
Spring Bread Wheat ◽  
Genome Wide ◽  
Anther Length ◽  
Anther Extrusion

Hybrid wheat breeding is one of the most promising technologies for further sustainable yield increases. However, the cleistogamous nature of wheat displays a major bottleneck for a successful hybrid breeding program. Thus, an optimized breeding strategy by developing appropriate parental lines with favorable floral trait combinations is the best way to enhance the outcrossing ability. This study, therefore, aimed to dissect the genetic basis of various floral traits using genome-wide association study (GWAS) and to assess the potential of genome-wide prediction (GP) for anther extrusion (AE), visual anther extrusion (VAE), pollen mass (PM), pollen shedding (PSH), pollen viability (PV), anther length (AL), openness of the flower (OPF), duration of floret opening (DFO) and stigma length. To this end, we employed 196 ICARDA spring bread wheat lines evaluated for three years and genotyped with 10,477 polymorphic SNP. In total, 70 significant markers were identified associated to the various assessed traits at FDR ≤ 0.05 contributing a minor to large proportion of the phenotypic variance (8–26.9%), affecting the traits either positively or negatively. GWAS revealed multi-marker-based associations among AE, VAE, PM, OPF and DFO, most likely linked markers, suggesting a potential genomic region controlling the genetic association of these complex traits. Of these markers, Kukri_rep_c103359_233 and wsnp_Ex_rep_c107911_91350930 deserve particular attention. The consistently significant markers with large effect could be useful for marker-assisted selection. Genomic selection revealed medium to high prediction accuracy ranging between 52% and 92% for the assessed traits with the least and maximum value observed for stigma length and visual anther extrusion, respectively. This indicates the feasibility to implement genomic selection to predict the performance of hybrid floral traits with high reliability.

scholarly journals CSCS: a chromatin state interface for Chinese Spring bread wheat

aBIOTECH ◽  
2021 ◽  
Author(s):  
Xiaojuan Ran ◽  
Tengfei Tang ◽  
Meiyue Wang ◽  
Luhuan Ye ◽  
Yili Zhuang ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Chinese Spring ◽  
Chromatin State ◽  
Spring Bread Wheat

scholarly journals Analysis of Glu-1 loci in samples of rare wheat species and their hybrides

2018 ◽  
Vol 23 ◽  
pp. 120-125
Author(s):  
S. M. Sichkar ◽  
L. H. Velykozhon ◽  
O. V. Dubrovna ◽  
B. V. Morgun
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Pcr Analysis ◽  
Dasypyrum Villosum ◽  
Wheat Species ◽  
Triticum Spelta ◽  
Spring Bread Wheat ◽  
Breeding Work ◽  
Allele Composition

Aim. Determination of the allelic composition of Glu-1 loci in samples of rare wheat species and their hybrids with spring bread wheat. Methods. PCR analysis. Results. In existing collection samples of the rare wheat species the alleles of the a/c loci Glu-A1 were found, while allele b was found only in T.dicoccum, var. volgense (Emmer Kokchetavskaya). An additional amplicon with a length of 450 bp was found in the Glu-A1 locus in the sample (T. dicoccum × Dasypyrum villosum), and in (Ae. ventricosa × T. dicoccum) another one a length of 700 bp in genome B, was found require further research. Among hexaploid wheat, it was revealed genotypes differing in the presence of alleles a and d of the locus Glu-D1. The hybridity of the received forms has been confirmed, as evidenced by the identification of both parent components in the hybrids or alleles of the Glu-D1 locus of bread wheat in hybrids with emmer. Conclusions. Analysis of the allele composition of Glu1 locuses in samples of rare wheat species and their hybrids with bread wheat allowed to select genotypes and hybrid combinations that may be promising for further breeding work. Keywords: Triticum spelta L., T. dicoccum, hybrids, PCR analysis, Glu-1 locus.

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