A major gene for grain cadmium accumulation in oat (Avena sativa L.).

Abstract:

:Cadmium (Cd) is a nonessential heavy metal that is highly toxic to living cells at very low concentrations. Most of the Cd in plants derives from soils. Owing to the large amounts consumed, cereals are the major source of dietary Cd, and Cd content in oat can exceed accepted limits. Plants have a set of mechanisms that control the uptake, accumulation, trafficking, and detoxification of Cd and other metals. Genetic factors affect the variation in Cd level between plant species and cultivars, and the development of cultivars that poorly accumulate Cd is a worthwhile goal. Because of the expense of Cd screening, the use of molecular markers linked to low Cd accumulation could be an alternative to phenotyping for selection. In this study, such markers were sought using bulked-segregant analysis in an F2 population from the cross between oat cultivars 'Aslak' and 'Salo', the second of which is known to be a high Cd accumulator. Four markers associated with grain Cd concentration were found: 2 RAPDs (random amplified polymorphic DNAs), 1 REMAP (retrotransposon-microsatellite amplified polymorphism), and 1 SRAP (sequence-related amplified polymorphism). The first 3 were converted into more reproducible SCAR (sequence-characterized amplified region) markers. The 4 markers were assigned to 1 linkage group that exhibited a QTL (quantitative trait locus) representing a major gene for grain Cd concentration.

journal_name

Genome

journal_title

Genome

authors

Tanhuanpää P,Kalendar R,Schulman AH,Kiviharju E

doi

10.1139/g07-036

subject

Has Abstract

pub_date

2007-06-01 00:00:00

pages

588-94

issue

6

eissn

0831-2796

issn

1480-3321

pii

g07-036

journal_volume

50

pub_type

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