Exploring genetic diversity and quality traits in a collection of onion (Allium cepa L) landraces from North-West Spain
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Date
2015
Authors
González Pérez, SusanaMallor Giménez, Cristina
Garcés Claver, Ana
Merino, Fuencisla
Taboada, Alfredo
Rivera, Antonio
Pomar, Federico
Perovic, Dragan
Silvar, Cristina
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Abstract
Seventeen onion landraces from North-West Spain were evaluated using microsatellites
markers. Eleven polymorphic markers identified 32 alleles in the whole collection, with
an average of 2.9 alleles per locus. High values of observed (mean of 0.45) and expected
heterozigosity (mean of 0.51) were detected for the majority of loci. Wright’s fixation
index confirmed an excess of heterozygotes and a low level of inbreeding within the
collection. Multivariate analyses revealed that Oimbra was the most distinctive genotype.
The remaining 16 onion genotypes were in part assorted according to some
morphological traits of bulbs. Pungency and solid soluble content highly varied among
landraces and bulbs. Five landraces were classified as sweet, whereas 9 possessed
medium pungency and 3 were recorded as pungent. This onion collection represents a
useful source of genetic heterogeneity that might be exploited in breeding programs for
the generation of new onion varieties that satisfy consumer demands
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Bibliographic citation
Genetika, 47(3), p. 885-900
AGROVOC subjects
CebollaAllium cepa
Variedades autóctonas
Diversidad genética entre especies
Ácido piruvico