Tracing the ancestry of modern bread wheats

Pont, Caroline; Leroy, Thibault; Seidel, Michael; Tondelli, Alessandro; Duchemin, Wandrille; Armisén, David; Lang, Daniel; Bustos-Korts, Daniela; Goué, Nadia; Balfourier, François; Molnár-Láng, Márta; Lage, Jean-Luc Da; Kilian, Benjamin; Özkan, Hakan; Waite, Darren; Dyer, Sarah; Letellier, Thomas; Alaux, Michaël; Russell, Joanne; Keller, Beat; Eeuwijk, Fred van; Spannagl, Manuel; Mayer, Klaus; Waugh, Robbie; Stein, Nils; Cattivelli, Luigi; Haberer, Georg; Charmet, Gilles; Salse, Jérôme

doi:10.1038/s41588-019-0393-z

Cited by 214 publications

(212 citation statements)

References 49 publications

Supporting

Mentioning

201

Contrasting

Unclassified

Order By: Relevance

“…This survey confirmed earlier studies showing that bread wheat has asymmetric distribution of nucleotide diversity on ABD subgenomes with π B > π A ≫ π D 9,11,22,23 . We provided a whole-genome estimate that π D was only 12% and 8% of π A and π B (Fig.…”

Section: Resultssupporting

confidence: 91%

“…Tauschii . However, based on competing evolutionary models, the tetraploid donor could either be domesticated emmer 19 , free-threshing tetraploids 20 , or durum 21,22 . Our results showed that free-threshing tetraploids were the closest basal group to all bread wheat, including both bread wheat landraces (hereinafter referred to as landrace) and bread wheat cultivated varieties (hereinafter referred to as cultivar), indicating that the direct donor of AB subgenomes of bread wheat was mostly likely to be free-threshing tetraploids (Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Convergence within divergence: insights of wheat adaptation fromTriticumpopulation sequencing

Zhou

Zhao

et al. 2020

Preprint

View full text Add to dashboard Cite

30Bread wheat expanded its habitats from a small core area of the Fertile Crescent to global 31 environments within ~10,000 years. Genetic mechanisms of this remarkable evolutionary 32 success are not well understood. By whole-genome sequencing of populations from 25 33 subspecies within genera Triticum and Aegilops, we identified composite introgression 34 from these wild populations contributing 13%~36% of the bread wheat genome, which 35 tremendously increased the genetic diversity of bread wheat and allowed its divergent 36 adaptation. Meanwhile, convergent adaption to human selection showed 2-to 16-fold 37 enrichment relative to random expectation in Triticum species despite their drastic 38 differences in ploidy levels and growing zones, indicating the vital importance of adaptive 39 constraints in the success of bread wheat. These results showed the genetic necessities 40 of wheat as a global crop and provided new perspectives on leveraging adaptation 41 success across species for crop improvement. 42 43Bread wheat (Triticum aestivum. ssp. aestivum) is one of the most successful crops on 44 earth since the Neolithic Age. Within only a few millennia, wheat expanded its habitat 45 from a small core area within the Fertile Crescent to a broad spectrum of diverse 46 environments around the globe, making it the most widely grown crop in the world 1,2 . 47Despite, wheat serving as one of the keystone crops for global food security, offering ~20% 48 of calories and proteins of human diet 3 , new environments resulting from climate change 49 may compromise its production 4,5 . Understanding the genetic mechanisms of the 50 adaptation success is key to productive and stable wheat production in the future. 51 52 Bread wheat (2n = 6x = 42, AABBDD) is an allohexaploid species, comprising of A, B, 53 and D subgenomes. It originated from two successive rounds of polyploidization within 54 genera Triticum and Aegilops, forming tetraploid wheat (AABB) and hexaploid wheat 55 (AABBDD), respectively 6 . By fusing genomes previously existing in different 56 environments, polyploidization brought broader adaptability to bread wheat 7 . However, 57 the same polyploidization process combined with the domestication bottleneck induced 58 severe diversity reduction to the ancestral population of bread wheat 8,9 , which was likely 59 impeding its range expansion. Recent studies identified that introgression from wild 60 emmer (T. turgidum. ssp. dicoccoides, AABB) could increase the diversity of bread 61 wheat 10,11 . Nevertheless, given the complex taxonomic groups within genera Triticum and 62Aegilops plus their unresolved phylogeny ( Supplementary Table 1) 12-14 , understanding 63 the diversity recovery of bread wheat from introgression may be still far from enough. In 64 addition to the obscurity of the divergent adaptation, questions on the convergent side of 65 the adaptation coin remain to be addressed. The evolution of wheats, or Triticum species, 66 is deeply rooted in human selection for agronomic traits, which almost excl...

show abstract

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Convergence within divergence: insights of wheat adaptation fromTriticumpopulation sequencing

Zhou

Zhao

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Early crop cultivation and domestication were key in the rise of agrarian societies and civilizations (Diamond 2002). Wheat represents one of the first cereal crop species, domesticated 10,000 years ago in the Fertile Crescent, it underwent through a reticulated evolution (Pont et al 2019). The (un)conscious anthropogenic selection led to substantial alterations of the plant physiology which are hallmarked by seed size enlargement (Purugganan et al 2009), loss of shattering (Fuller et al 2007) and increased yield (Preece et al 2017).…”

Section: Figurementioning

confidence: 99%

Ecological assembly processes of the bacterial and fungal microbiota of wild and domesticated wheat species

Hassani

Özkurt

Franzenburg³

et al. 2020

Preprint

View full text Add to dashboard Cite

Plant domestication has led to substantial changes in the host physiology. How this anthropogenic intervention has contributed in altering the wheat microbiota is not well understood. Here, we investigated the role of ecological selection, drift and dispersal in shaping the bacterial and fungal communities associated with domesticated wheat Triticum aestivum and two wild relatives, Triticum boeoticum and Triticum urartu. Our study shows that the bacterial and fungal microbiota of wild and domesticated wheat species follow distinct community assembly patterns. Further, we revealed a more prominent role of neutral processes in the assembly of the microbiota of domesticated wheat and propose that domestication has relaxed selective processes in the assembly of the wheat microbiota.

show abstract

“…We focused our study on wheat, which represents an ideal model system to study the impact of recent artificial plant selection associated with domestication and genetic plant divergence on plant associated microbiota. Bread wheat, Triticum aestivum , was domesticated in the Fertile Crescent 10-12.000 years ago and the domestication history has been well characterized (18), (19), (20). Moreover, the underlying genetics of wheat domestication has been described in details, including bottlenecks in the wheat diversity following strong directional selection and polyploidization (21), (20).…”

Section: Introductionmentioning

confidence: 99%

Higher stochasticity of microbiota composition in seedlings of domesticated wheat compared to wild wheat

Özkurt

Hassani

Sesiz

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

26Plants constitute an ecological niche for microbial communities that colonize different 27 plant tissues and explore the plant habitat for reproduction and dispersal. The 28 association of microbiota and plant may be altered by ecological and evolutionary 29 changes in the host population. Seedborne microbiota, expected to be largely vertically-30 transferred, have the potential to co-adapt with their host over generations. Reduced 31 host diversity because of strong directional selection and polyploidization during plant 32 domestication and cultivation may have impacted the assembly and transmission of 33 seed-associated microbiota. Nonetheless, the effect of plant domestication on the 34 diversity of their associated microbes is poorly understood. Here we show that microbial 35 communities in domesticated wheat, Triticum aestivum, are less diverse but more 36 inconsistent among individual plants compared to the wild wheat species, T. 37 dicoccoides. We found that diversity of microbes in seeds overall is low, but comparable 38 in different wheat species, independent of their genetic and geographic origin. 39However, the diversity of seedborne microbiota that colonize the roots and leaves of 40 the young seedling is significantly reduced in domesticated wheat genotypes. Moreover, 41we observe a higher variability between replicates of T. aestivum suggesting a stronger 42 effect of chance events in microbial colonization and assembly. We also propagated wild 43 and domesticated wheat in two different soils and found that different factors govern 44 the assembly of soil-derived and seedborne microbial communities. Overall, our results 45 demonstrate that the role of stochastic processes in seedborne microbial community 46 assembly is larger in domesticated wheat compared to the wild wheat. We suggest that 47 the directional selection on the plant host and polyploidization events during 48 domestication may have decreased the degree of wheat-microbiota interactions and 49 consequently led to a decreased stable core microbiota. 50 51

show abstract

Tracing the ancestry of modern bread wheats

Cited by 214 publications

References 49 publications

Convergence within divergence: insights of wheat adaptation fromTriticumpopulation sequencing

Convergence within divergence: insights of wheat adaptation fromTriticumpopulation sequencing

Ecological assembly processes of the bacterial and fungal microbiota of wild and domesticated wheat species

Higher stochasticity of microbiota composition in seedlings of domesticated wheat compared to wild wheat

Contact Info

Product

Resources

About