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Publication Type J
Authors Ribeiro, IC; Pinheiro, C; Ribeiro, CM; Veloso, MM; Simoes-Costa, MC; Evaristo, I; Paulo, OS; Ricardo, CP
Author Full Name Ribeiro, Isa C.; Pinheiro, Carla; Ribeiro, Carla M.; Veloso, Maria M.; Simoes-Costa, Maria C.; Evaristo, Isabel; Paulo, Octavio S.; Ricardo, Candido P.
Title Genetic Diversity and Physiological Performance of Portuguese Wild Beet (Beta vulgaris spp. maritima) from Three Contrasting Habitats
Source FRONTIERS IN PLANT SCIENCE
Language English
Document Type Article
Author Keywords physiological characterization; population structure; biomass; crop wild relatives; allele richness
Keywords Plus CARBON-ISOTOPE DISCRIMINATION; SUGAR-BEET; DROUGHT TOLERANCE; SSP MARITIMA; L. CULTIVARS; PHOTOSYNTHESIS; POPULATIONS; MARKERS; TRAITS; GROWTH
Abstract The establishment of stress resilient sugar beets (Beta vulgaris spp. vulgaris) is an important breeding goal since this cash crop is susceptible to drought and salinity. The genetic diversity in cultivated sugar beets is low and the beet wild relatives are useful genetic resources for tolerance traits. Three wild beet populations (Beta vulgaris spp. maritima) from contrasting environments, Vaiamonte (VMT, dry inland hill), Comporta (CMP, marsh) and Oeiras (OEI, coastland), and one commercial sugar beet (Isella variety, SB), are compared. At the genetic level, the use of six microsatellite allowed to detect a total of seventy six alleles. It was observed that CMP population has the highest value concerning the effective number of alleles and of expected heterozygosity. By contrast, sugar beet has the lowest values for all the parameters considered. Loci analysis with STRUCTURE allows defining three genetic clusters, the sea beet (OEI and CMP), the inland ruderal beet (VMT) and the sugar beet (SB). A screening test for progressive drought and salinity effects demonstrated that: all populations were able to recover from severe stress; drought impact was higher than that from salinity; the impact on biomass (total, shoot, root) was population specific. The distinct strategies were also visible at physiological level. We evaluated the physiological responses of the populations under drought and salt stress, namely at initial stress stages, late stress stages, and early stress recovery. Multivariate analysis showed that the physiological performance can be used to discriminate between genotypes, with a strong contribution of leaf temperature and leaf osmotic adjustment. However, the separation achieved and the groups formed are dependent on the stress type, stress intensity and duration. Each of the wild beet populations evaluated is very rich in genetic terms (allelic richness) and exhibited physiological plasticity, i.e., the capacity to physiologically adjust to changing environments. These characteristics emphasize the importance of the wild beet ecotypes for beet improvement programs. Two striking ecotypes are VMT, which is the best to cope with drought and salinity, and CMP which has the highest root to shoot ratio. These genotypes can supply breeding programs with distinct goals.
Author Address [Ribeiro, Isa C.; Pinheiro, Carla; Ricardo, Candido P.] Univ NOVA Lisboa, Inst Tecnol Quim & Biol, Oeiras, Portugal; [Pinheiro, Carla] Univ NOVA Lisboa, Fac Ciencias & Tecnol, Caparica, Portugal; [Ribeiro, Carla M.; Paulo, Octavio S.] Univ Lisbon, Fac Ciencias, Ctr Ecol Evolut & Environm Changes, Computat Biol & Populat Genom Grp, Lisbon, Portugal; [Veloso, Maria M.] INIAV, Unidade Invest Biotecnol & Recursos Genet, Oeiras, Portugal; [Veloso, Maria M.; Simoes-Costa, Maria C.] Univ Lisbon, Inst Super Agron Linking Landscape Environm Agr &, Lisbon, Portugal; [Evaristo, Isabel] INIAV, Unidade Invest Sistemas Agr & Florestais & Sanida, Oeiras, Portugal
Reprint Address Pinheiro, C (reprint author), Univ NOVA Lisboa, Inst Tecnol Quim & Biol, Oeiras, Portugal.; Pinheiro, C (reprint author), Univ NOVA Lisboa, Fac Ciencias & Tecnol, Caparica, Portugal.
E-mail Address pinheiro@itqb.unl.pt
ResearcherID Number Pinheiro, Carla/A-4053-2008
ORCID Number Pinheiro, Carla/0000-0002-7799-0183
Funding Agency and Grant Number Fundacao para a Ciencia e a Tecnologia [PTDC/AGR-AAM/73144/2006, PEst-OE/EQB/LA0004/2011]
Funding Text This work was supported by Fundacao para a Ciencia e a Tecnologia through the projects PTDC/AGR-AAM/73144/2006 and PEst-OE/EQB/LA0004/2011. IR and CMR acknowledge grants through the PTDC/AGR-AAM/73144/2006 project.
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Cited Reference Count 57
Publisher FRONTIERS MEDIA SA
Publisher City LAUSANNE
Publisher Address PO BOX 110, EPFL INNOVATION PARK, BUILDING I, LAUSANNE, 1015, SWITZERLAND
ISSN 1664-462X
29-Character Source Abbreviation FRONT PLANT SCI
ISO Source Abbreviation Front. Plant Sci.
Publication Date AUG 31
Year Published 2016
Volume 7
Article Number 1293
Digital Object Identifier (DOI) 10.3389/fpls.2016.01293
Page Count 14
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number DU5VX
Unique Article Identifier WOS:000382282600001
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