Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars
Abstract Variation in fitness components can be linked in some cases to variation in key traits. Metric traits that lie at the intersection of development, defense, and ecological interactions may be expected to experience environmental selection, informing our understanding of evolutionary and ecol...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-10-01
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| Series: | Ecology and Evolution |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ece3.10579 |
| _version_ | 1797648345412403200 |
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| author | Karl C. Fetter Stephen R. Keller |
| author_facet | Karl C. Fetter Stephen R. Keller |
| author_sort | Karl C. Fetter |
| collection | DOAJ |
| description | Abstract Variation in fitness components can be linked in some cases to variation in key traits. Metric traits that lie at the intersection of development, defense, and ecological interactions may be expected to experience environmental selection, informing our understanding of evolutionary and ecological processes. Here, we use quantitative genetic and population genomic methods to investigate disease dynamics in hybrid and non‐hybrid populations. We focus our investigation on morphological and ecophysiological traits which inform our understanding of physiology, growth, and defense against a pathogen. In particular, we investigate stomata, microscopic pores on the surface of a leaf that regulate gas exchange during photosynthesis and are sites of entry for various plant pathogens. Stomatal patterning traits were highly predictive of disease risk. Admixture mapping identified a polygenic basis of disease resistance. Candidate genes for stomatal and disease resistance map to the same genomic regions and experienced positive selection. Genes with functions to guard cell homeostasis, the plant immune system, components of constitutive defenses, and growth‐related transcription factors were identified. Our results indicate positive selection acted on candidate genes for stomatal patterning and disease resistance, potentially acting in concert to structure their variation in naturally formed backcrossing hybrid populations. |
| first_indexed | 2024-03-11T15:30:49Z |
| format | Article |
| id | doaj.art-1e71615fb94a4370befaf6eaba7d34a6 |
| institution | Directory Open Access Journal |
| issn | 2045-7758 |
| language | English |
| last_indexed | 2024-03-11T15:30:49Z |
| publishDate | 2023-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj.art-1e71615fb94a4370befaf6eaba7d34a62023-10-27T04:40:51ZengWileyEcology and Evolution2045-77582023-10-011310n/an/a10.1002/ece3.10579Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplarsKarl C. Fetter0Stephen R. Keller1Department of Plant Biology University of Vermont Burlington Vermont USADepartment of Plant Biology University of Vermont Burlington Vermont USAAbstract Variation in fitness components can be linked in some cases to variation in key traits. Metric traits that lie at the intersection of development, defense, and ecological interactions may be expected to experience environmental selection, informing our understanding of evolutionary and ecological processes. Here, we use quantitative genetic and population genomic methods to investigate disease dynamics in hybrid and non‐hybrid populations. We focus our investigation on morphological and ecophysiological traits which inform our understanding of physiology, growth, and defense against a pathogen. In particular, we investigate stomata, microscopic pores on the surface of a leaf that regulate gas exchange during photosynthesis and are sites of entry for various plant pathogens. Stomatal patterning traits were highly predictive of disease risk. Admixture mapping identified a polygenic basis of disease resistance. Candidate genes for stomatal and disease resistance map to the same genomic regions and experienced positive selection. Genes with functions to guard cell homeostasis, the plant immune system, components of constitutive defenses, and growth‐related transcription factors were identified. Our results indicate positive selection acted on candidate genes for stomatal patterning and disease resistance, potentially acting in concert to structure their variation in naturally formed backcrossing hybrid populations.https://doi.org/10.1002/ece3.10579admixture mappingdisease ecologyhybridsMelampsoraPopulusquantitative genetics |
| spellingShingle | Karl C. Fetter Stephen R. Keller Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars Ecology and Evolution admixture mapping disease ecology hybrids Melampsora Populus quantitative genetics |
| title | Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars |
| title_full | Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars |
| title_fullStr | Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars |
| title_full_unstemmed | Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars |
| title_short | Admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars |
| title_sort | admixture mapping and selection scans identify genomic regions associated with stomatal patterning and disease resistance in hybrid poplars |
| topic | admixture mapping disease ecology hybrids Melampsora Populus quantitative genetics |
| url | https://doi.org/10.1002/ece3.10579 |
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