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Genetic mapping of a major gene delaying blooming time in almond
Author(s) -
Ballester J.,
Socias i Company R.,
Arus P.,
De Vicente M. C.
Publication year - 2001
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1046/j.1439-0523.2001.00604.x
Subject(s) - biology , bulked segregant analysis , genetics , major gene , allele , gene , genetic linkage , genetic marker , gene mapping , quantitative trait locus , population , rapd , genetic analysis , botany , chromosome , genetic diversity , demography , sociology
The objective of this study was to determine the genetic basis of late blooming in almond. Molecular markers were used to study the Late bloom gene ( Lb ), responsible for a delay of blooming time, in an F 1 segregating population of 134 plants. Using a qualitative approach, the Lb gene was located on linkage group 4 of the almond map, flanked by markers AG6 and FG3. The quantitative analysis confirmed the presence of a major gene on linkage group 4, which explained at least 79% of the phenotypic variation. On average, the plants with the Lb allele bloomed 15 days later and the Lb allele showed dominant gene action. In addition, three RAPD markers associated with the Lb gene were identified by bulked segregant analysis. One was placed at 5.4 cM from Lb and could be used as a diagnostic marker for flowering time.