Publication Overview
Abstract Reproductive phenological traits of great
agronomical interest in apricot species, including flowering
date, ripening date and fruit development period, were studied
during 3 years in two F1 progenies derived from the crosses
‘Bergeron’ × ‘Currot’ (B × C) and ‘Goldrich’ × ‘Currot’
(G × C). Results showed great variability and segregation in
each population, confirming the polygenic nature and quantitative
inheritance of all the studied traits. Genetic linkage maps
were constructed combining SSR and SNP markers, using 87
markers in the ‘B×C’ population and 89 markers in ‘G×C’.
The genetic linkage maps in both progenies show the eight
linkage groups (LGs) of apricot, covering a distance of
394.9 cM in ‘Bergeron’ and of 414.3 cM in ‘Currot’. The
‘Goldrich’ and ‘Currot’ maps were of 353.5 and 422.3 cM,
respectively. The average distance obtained between markers
was thus 7.59 cM in ‘Bergeron’ and 7.53 cM in ‘Currot’,
whereas the ‘Goldrich’ and ‘Currot’ averages were 5.6 and
7.5 cM, respectively. According to the polygenic nature of the
studied phenology traits, QTLs linked to flowering date, ripening
date and the fruit development period were identified during
the 3 years of the study in all LGs except for LG 8. Among the
QTLs identified, major QTLs for flowering and ripening date
and the fruit development period were identified in LG 4, especially
important in the ‘G×C’ population.
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