Does introgression of crop alleles into wild and weedy living populations create cryptic in situ germplasm banks?

Ellstrand, Norman C.

doi:10.1111/mec.14390

Cited by 6 publications

(7 citation statements)

References 13 publications

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“…Many features associated with domestication are not advantageous in terms of reproduction and survival of following generations lacking human intervention ( Gepts, 2004 ), because the selective pressures by which they have evolved are determined by humans (see categories 1–4 of the classification proposed by Clement, 1999 ). As a result, gene flow between wild relatives and cultivated plants could have negative consequences ( Andersson and de Vicente, 2010 ), however, it could also give rise to in situ reservoirs of domesticated genes for the future ( Ellstrand, 2018 ). Each domesticated cotton plant develops 50% more descendant plants than the wild plants do within their natural distribution, so the ecological-evolutionary consequences of this result will depend on the evolutionary process and the agro-ecological or ecosystem context in which plants are developed.…”

Section: Discussionmentioning

confidence: 99%

“…However, the factors that mold each part of the wild-to-domesticated complex are different; for example, the conservation of native traditional varieties depends to a great extent on the communities that cultivate them, their management techniques, and interests ( Zhang et al, 2007 ). Hence, the parts of the complex that could be used for crop improvement will depend on the objectives of the new processes of domestication and breeding ( Ellstrand, 2018 ; Mastretta-Yanes et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

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The Mating System of the Wild-to-Domesticated Complex of Gossypium hirsutum L. Is Mixed

et al. 2018

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The domestication syndrome of many plants includes changes in their mating systems. The evolution of the latter is shaped by ecological and genetic factors that are particular to an area. Thus, the reproductive biology of wild relatives must be studied in their natural distribution to understand the mating system of a crop species as a whole. Gossypium hirsutum (upland cotton) includes both domesticated varieties and wild populations of the same species. Most studies on mating systems describe cultivated cotton as self-pollinated, while studies on pollen dispersal report outcrossing; however, the mating system of upland cotton has not been described as mixed and little is known about its wild relatives. In this study we selected two wild metapopulations for comparison with domesticated plants and one metapopulation with evidence of recent gene flow between wild relatives and the crop to evaluate the mating system of cotton’s wild-to-domesticated complex. Using classic reproductive biology methods, our data demonstrate that upland cotton presents a mixed mating system throughout the complex. Given cotton’s capacity for outcrossing, differences caused by the domestication process in cultivated individuals can have consequences for its wild relatives. This characterization of the diversity of the wild relatives in their natural distribution, as well as their interactions with the crop, will be useful to design and implement adequate strategies for conservation and biosecurity.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The Mating System of the Wild-to-Domesticated Complex of Gossypium hirsutum L. Is Mixed

et al. 2018

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“…Microbial communities are clearly an emerging area of interest, with papers examining the genetic basis of host-fungal symbiont interactions, particularly relating to the evolution of host specialization (Gladieux, 2018), and the transcriptomics of biofilms (Veach & Griffiths, 2018). Other Perspectives discussed the predictability of evolutionary genetic changes (Linnen, 2018), the maintenance of diversity because of selection driven by sexual conflict (Meisel, 2018), the value of improved annotation of gene functions by analysing expression responses to environmental conditions (Stanford & Rogers, 2018), gene expression differences in brain tissue from females, territorial and sneaker male peacock blennies (Böhne, 2018) and the potential importance of crop-wild hybrids in weedy populations in maintaining important crop allelic diversity (Ellstrand, 2018).…”

Section: News and Views Sectionmentioning

confidence: 99%

Editorial 2019

Geraldes¹,

Belkin²,

Chambers³

et al. 2019

Molecular Ecology

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“…Therefore, it is possible to reveal the consequences and underlying mechanisms of cropto-weed introgression and its evolutionary impact by studying a conspecific weed and its cooccurring crop species. Crop-specific alleles can accumulate in weedy populations by introgression from different crop varieties through time, which may result in genetic differentiation and increased adaptability of the weedy populations [18][19][20][21][22][23][24]. However, the knowledge on how crop-to-weed introgression influences genetic differentiation and diversity of the receipt weedy populations is still limited.…”

Section: Introductionmentioning

confidence: 99%

Crop–Weed Introgression Plays Critical Roles in Genetic Differentiation and Diversity of Weedy Rice: A Case Study of Human-Influenced Weed Evolution

Cai

Wang

Yuán

et al. 2023

Biology

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As an important driving force, introgression plays an essential role in shaping the evolution of plant species. However, knowledge concerning how introgression affects plant evolution in agroecosystems with strong human influences is still limited. To generate such knowledge, we used InDel (insertion/deletion) molecular fingerprints to determine the level of introgression from japonica rice cultivars into the indica type of weedy rice. We also analyzed the impact of crop-to-weed introgression on the genetic differentiation and diversity of weedy rice, using InDel (insertion/deletion) and SSR (simple sequence repeat) molecular fingerprints. Results based on the STRUCTURE analysis indicated an evident admixture of some weedy rice samples with indica and japonica components, suggesting different levels of introgression from japonica rice cultivars to the indica type of weedy rice. The principal coordinate analyses indicated indica–japonica genetic differentiation among weedy rice samples, which was positively correlated with the introgression of japonica-specific alleles from the rice cultivars. In addition, increased crop-to-weed introgression formed a parabola pattern of dynamic genetic diversity in weedy rice. Our findings based on this case study provide evidence that human activities, such as the frequent change in crop varieties, can strongly influence weed evolution by altering genetic differentiation and genetic diversity through crop–weed introgression in agroecosystems.

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Does introgression of crop alleles into wild and weedy living populations create cryptic in situ germplasm banks?

Cited by 6 publications

References 13 publications

The Mating System of the Wild-to-Domesticated Complex of Gossypium hirsutum L. Is Mixed

The Mating System of the Wild-to-Domesticated Complex of Gossypium hirsutum L. Is Mixed

Editorial 2019

Crop–Weed Introgression Plays Critical Roles in Genetic Differentiation and Diversity of Weedy Rice: A Case Study of Human-Influenced Weed Evolution

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