Negative dominance and dominance-by-dominance epistatic effects reduce grain-yield heterosis in wide crosses in wheat

Boeven, Philipp H. G.; Zhao, Yusheng; Thorwarth, Patrick; Liu, Fang; Maurer, Hans Peter; Gils, Mario; Schachschneider, Ralf; Schacht, Johannes; Ebmeyer, Erhard; Kazman, Ebrahim; Mirdita, Vilson; Dörnte, Jost; Kontowski, Stefan; Horbach, Ralf; Cöster, Hilmar; Holzapfel, Josef; Jacobi, Andreas; Ramgraber, Ludwig; Reinbrecht, C.; Starck, Norbert; Varenne, Pierrick; Starke, Anne; Schürmann, Friederike; Ganal, Martin W.; Polley, Andreas; Hartung, Jens; Beier, Sebastian; Scholz, Uwe; Longin, C. Friedrich H.; Reif, Jochen C.; Jiang, Yong; Würschum, Tobias

doi:10.1126/sciadv.aay4897

Cited by 46 publications

(59 citation statements)

References 48 publications

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“…Due to plant height and flowering characteristics, wheat genetic resources can be used predominantly as males and elite lines as females in hybrid seed production. In this case, selected plant genetic resources should tend toward open pollination -a property that has been observed earlier for wheat genetic resources of the German Federal ex situ Genebank for Agricultural and Horticultural Crops (Boeven et al, 2020).…”

Section: Introductionmentioning

confidence: 79%

“…compared to the experiments conducted in the other two growing seasons. The design of the seed production experiment was focused on reducing the general effect of the male lines and the interaction effects between the female and male line by choosing excellent pollinators known from previous hybrid seed production experiments (Boeven et al, 2020). The flowering time synchronization was also considered (Supplementary Figure 2).…”

Section: The Choice Of the Female Tester Lines Impacted The Seed Yield In Hybrid Productionmentioning

confidence: 99%

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Assessing the Suitability of Elite Lines for Hybrid Seed Production and as Testers in Wide Crosses With Wheat Genetic Resources

et al. 2021

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The use of genetic resources in breeding is considered critical to ensure future selection gain, but the absence of important adaptation genes often masks the breeding value of genetic resources for grain yield. Testing genetic resources in a hybrid background has been proposed as a solution to obtain unbiased estimates of breeding values for grain yield. In our study, we evaluated the suitability of European wheat elite lines for implementing this hybrid strategy, focusing on maximizing seed yield in hybrid production and reducing masking effects due to susceptibility to lodging, yellow rust, and leaf rust of genetic resources. Over a 3-year period, 63 wheat elite female lines were crossed with eight male plant genetic resources in a multi-environment field experiment to evaluate seed yield on the female side. Then, the resulting hybrids and their parents were tested for plant height, lodging, and susceptibility to yellow rust and leaf rust in a further field experiment at multiple locations. We found that seed yield was strongly influenced by the elite wheat line choice in addition to environment and observed substantial differences among elite tester lines in their ability to reduce susceptibility to lodging, yellow rust, and leaf rust when the hybrid strategy was implemented. Consequently, breeders can significantly increase the amount of hybrid seed produced in wide crosses through appropriate tester choice and adapt genetic resources of wheat with the hybrid strategy to the modern cropping system.

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Section: Introductionmentioning

confidence: 79%

Section: The Choice Of the Female Tester Lines Impacted The Seed Yield In Hybrid Productionmentioning

confidence: 99%

Assessing the Suitability of Elite Lines for Hybrid Seed Production and as Testers in Wide Crosses With Wheat Genetic Resources

et al. 2021

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“…, in CD), which might reflect their unreliability ( Figure 5 ). Even if genetic architecture based on genetic variance components was dissected ( Vitezica et al 2018 ; Alves et al 2019 ; Boeven et al 2020 ), the importance of each genetic effect ( i.e. , additive, dominance, and epistasis) cannot be inferred from the results ( Huang and Mackay 2016 ).…”

Section: Discussionmentioning

confidence: 99%

Dissecting the Genetic Architecture of Biofuel-Related Traits in a Sorghum Breeding Population

Ishimori

Takanashi

Hamazaki

et al. 2020

G3 Genes|Genomes|Genetics

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In sorghum [Sorghum bicolor (L.) Moench], hybrid cultivars for the biofuel industry are desired. Along with selection based on testcross performance, evaluation of the breeding population per se is also important for the success of hybrid breeding. In addition to additive genetic effects, non-additive (i.e., dominance and epistatic) effects are expected to contribute to the performance of early generations. Unfortunately, studies on early generations in sorghum breeding programs are limited. In this study, we analyzed a breeding population for bioenergy sorghum, which was previously developed based on testcross performance, to compare genomic selection models both trained on and evaluated for the per se performance of the 3rd generation S0 individuals. Of over 200 ancestral inbred accessions in the base population, only 13 founders contributed to the 3rd generation as progenitors. Compared to the founders, the performances of the population per se were improved for target traits. The total genetic variance within the S0 generation progenies themselves for all traits was mainly additive, although non-additive variances contributed to each trait to some extent. For genomic selection, linear regression models explicitly considering all genetic components showed a higher predictive ability than other linear and non-linear models. Although the number and effect distribution of underlying loci was different among the traits, the influence of priors for marker effects was relatively small. These results indicate the importance of considering non-additive effects for dissecting the genetic architecture of early breeding generations and predicting the performance per se.

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“…Details on the plant material have already been published (Philipp et al, 2018). The 378 wheat lines were characterized using (1) an Infinium 90,000 SNP array for 174 genotypes out of 571 samples (Wang et al, 2014) and a derived Infinium 15,000 SNP array for 204 genotypes out of 782 samples (Boeven et al, 2019), (2) GBS (Wendler et al, 2014), and (3) 19 SSR markers (Plaschke et al, 1995;Röder et al, 1995;Röder et al, 1998). The 90,000 SNP array data were used from a previously published study (Zanke et al, 2014a;Zanke et al, 2014b;Zanke et al, 2015).…”

Section: Genotyping and Population Genetic Analysesmentioning

confidence: 99%

“…Experiment 3 comprised field evaluation at five locations during 2016 and included 12 out of the 188 elite lines and 61 out of the 151 PGR. Briefly, the experimental design was an unreplicated alpha design (for details, see Boeven et al, 2019). Plot sizes ranged from 7.56 to 12 m².…”

Section: Field Trials and Phenotypic Data Analysismentioning

confidence: 99%

Suitability of Single-Nucleotide Polymorphism Arrays Versus Genotyping-By-Sequencing for Genebank Genomics in Wheat

et al. 2020

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Genebank genomics promises to unlock valuable diversity for plant breeding but first, one key question is which marker system is most suitable to fingerprint entire genebank collections. Using wheat as model species, we tested for the presence of an ascertainment bias and investigated its impact on estimates of genetic diversity and prediction ability obtained using three marker platforms: simple sequence repeat (SSR), genotyping-by-sequencing (GBS), and array-based SNP markers. We used a panel of 378 winter wheat genotypes including 190 elite lines and 188 plant genetic resources (PGR), which were phenotyped in multi-environmental trials for grain yield and plant height. We observed an ascertainment bias for the array-based SNP markers, which led to an underestimation of the molecular diversity within the population of PGR. In contrast, the marker system played only a minor role for the overall picture of the population structure and precision of genome-wide predictions. Interestingly, we found that rare markers contributed substantially to the prediction ability. This combined with the expectation that valuable novel diversity is most likely rare suggests that markers with minor allele frequency deserve careful consideration in the design of a prebreeding program.

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Negative dominance and dominance-by-dominance epistatic effects reduce grain-yield heterosis in wide crosses in wheat

Cited by 46 publications

References 48 publications

Assessing the Suitability of Elite Lines for Hybrid Seed Production and as Testers in Wide Crosses With Wheat Genetic Resources

Assessing the Suitability of Elite Lines for Hybrid Seed Production and as Testers in Wide Crosses With Wheat Genetic Resources

Dissecting the Genetic Architecture of Biofuel-Related Traits in a Sorghum Breeding Population

Suitability of Single-Nucleotide Polymorphism Arrays Versus Genotyping-By-Sequencing for Genebank Genomics in Wheat

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