Adaptive potential of Coffea canephora from Uganda in response to climate change.

Understanding vulnerabilities of plant populations to climate change could help preserve their biodiversity and reveal new elite parents for future breeding programmes. To this end, landscape genomics is a useful approach for assessing putative adaptations to future climatic conditions, especially in long-lived species such as trees. We conducted a population genomics study of 207 Coffea canephora trees from seven forests along different climate gradients in Uganda. For this, we sequenced 323 candidate genes involved in key metabolic and defence pathways in coffee. Seventy-one single nucleotide polymorphisms (SNPs) were found to be significantly associated with bioclimatic variables, and were thereby considered as putatively adaptive loci. These SNPs were linked to key candidate genes, including transcription factors, like DREB-like and MYB family genes controlling plant responses to abiotic stresses, as well as other genes of organoleptic interest, such as the DXMT gene involved in caffeine biosynthesis and a putative pest repellent. These climate-associated genetic markers were used to compute genetic offsets, predicting population responses to future climatic conditions based on local climate change forecasts. Using these measures of maladaptation to future conditions, substantial levels of genetic differentiation between present and future diversity were estimated for all populations and scenarios considered. The populations from the forests Zoka and Budongo, in the northernmost zone of Uganda, appeared to have the lowest genetic offsets under all predicted climate change patterns, while populations from Kalangala and Mabira, in the Lake Victoria region, exhibited the highest genetic offsets. The potential of these findings in terms of ex situ conservation strategies are discussed.

Bibliographic Details

Main Authors:	AQUINO, S. O. de, KIWUKA, C., TOURNEBIZE, R., GAIN, C., MARRACCINI, P., MARIAC, C., BETHUNE, K., COUDERC, M., CUBRY, P., ANDRADE, A. C., LEPELLEY, M., DARRACQ, O., CROUZILLAT, D., ANTEN, N., MUSOLI, P., VIGOUROUX, Y., KOCHKO, A. de, MANEL, S., FRANÇOIS, O., PONCET, V.
Other Authors:	SINARA OLIVEIRA DE AQUINO, UNIVERSITY OF MONTPELLIER; CATHERINE KIWUKA, WAGENINGEN UNIVERSITY; RÉMI TOURNEBIZE, UNIVERSITY OF MONTPELLIER; CLÉMENT GAIN, U. GRENOBLE-ALPES; PIERRE MARRACCINI, UNIVERSITY OF MONTPELLIER; CÉDRIC MARIAC, UNIVERSITY OF MONTPELLIER; KÉVIN BETHUNE, UNIVERSITY OF MONTPELLIER; MARIE COUDERC, UNIVERSITY OF MONTPELLIER; PHILIPPE CUBRY, UNIVERSITY OF MONTPELLIER; ALAN CARVALHO ANDRADE, CNPCa; MAUD LEPELLEY, NESTLE; OLIVIER DARRACQ, NESTLE; DOMINIQUE CROUZILLAT, NESTLE; NIELS ANTEN, WAGENINGEN UNIVERSITY; PASCAL MUSOLI, NARO; YVES VIGOUROUX, UNIVERSITY OF MONTPELLIER; ALEXANDRE DE KOCHKO, UNIVERSITY OF MONTPELLIER; STÉPHANIE MANEL, UNIVERSITY OF MONTPELLIER; OLIVIER FRANÇOIS, U. GRENOBLE-ALPES; VALÉRIE PONCET, UNIVERSITY OF MONTPELLIER.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	Molecular ecology, v. 31, n. 6, p. 180-1819, Jan. 2022. 2022-11-16
Subjects:	Climate change, Landscapes, Genomics, Plant breeding, Coffea canephora var. ugandae,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1148279 https://doi.org/10.1111/mec.16360
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