Unraveling the genetic basis of full flowering date in olive tree through QTL mapping approach: Towards climate-adaptive breeding DOI

Othmane Lamoumni,

Ahmed El Bakkali, Omar Abou-Saaid

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Background Future climate models project severe impacts on flowering phenology of perennial fruit trees in the Mediterranean region under increasing global warming, including olive tree, a key species extensively cultivated region. Thus, understanding genetic factors regulating is crucial for providing knowledge to select suitable cultivars and designing future breeding programs. Here, we aimed investigate control full date (FFD) through Quantitative Trait Loci (QTL) mapping approach. Two high-density parental maps, with more than 10k SNPs, were constructed based an “Olivière” x “Arbequina” F1 hybrid progeny. Phenological observations same progeny conducted across five environments (site × season), data served compute Best Linear Unbiased Predictors (BLUPs) FFD. Both FFD-based BLUPs single-environment used detect QTLs, which further explored in-silico candidate genes investigation. Results Analysis FFD distribution highlighted high heritability transgressive segregation. A total 18 significant QTLs identified analysis, six selected as most relevant. co-detected linkage groups (LGs) both maps some environments: LG09 (qFDO9b/ qFDA9) LG07 (qFDO7/ qFDA7). Additionally, four LG3 (qFDA3), LG22 (qFDA22) LG13 (qFDA13) map, (qFDO13) map revealed well analyses. qFDA13 qFDA22 characterized by higher explained variance (14.6% 11.6%, respectively) additive values (-1.09 + 1.15, respectively). Candidate investigation within probably involved transcription regulation, WRKY71, RLT3, ABSCISIC ACID-INSENSITIVE-5-LIKE, addition transport protein: FT–INTERACTING protein1. Genes shown interact main regulators such FLOWERING LOCUS T (FT) C (FLC). Conclusion Our study highlight tree. The genomic regions covered detected represent valuable resources investigations genome-wide association functional genomics studies. These findings will provide information applying selection develop new varieties adapted projections.

Language: Английский

Unraveling the genetic basis of full flowering date in olive tree through QTL mapping approach: Towards climate-adaptive breeding DOI

Othmane Lamoumni,

Ahmed El Bakkali, Omar Abou-Saaid

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Background Future climate models project severe impacts on flowering phenology of perennial fruit trees in the Mediterranean region under increasing global warming, including olive tree, a key species extensively cultivated region. Thus, understanding genetic factors regulating is crucial for providing knowledge to select suitable cultivars and designing future breeding programs. Here, we aimed investigate control full date (FFD) through Quantitative Trait Loci (QTL) mapping approach. Two high-density parental maps, with more than 10k SNPs, were constructed based an “Olivière” x “Arbequina” F1 hybrid progeny. Phenological observations same progeny conducted across five environments (site × season), data served compute Best Linear Unbiased Predictors (BLUPs) FFD. Both FFD-based BLUPs single-environment used detect QTLs, which further explored in-silico candidate genes investigation. Results Analysis FFD distribution highlighted high heritability transgressive segregation. A total 18 significant QTLs identified analysis, six selected as most relevant. co-detected linkage groups (LGs) both maps some environments: LG09 (qFDO9b/ qFDA9) LG07 (qFDO7/ qFDA7). Additionally, four LG3 (qFDA3), LG22 (qFDA22) LG13 (qFDA13) map, (qFDO13) map revealed well analyses. qFDA13 qFDA22 characterized by higher explained variance (14.6% 11.6%, respectively) additive values (-1.09 + 1.15, respectively). Candidate investigation within probably involved transcription regulation, WRKY71, RLT3, ABSCISIC ACID-INSENSITIVE-5-LIKE, addition transport protein: FT–INTERACTING protein1. Genes shown interact main regulators such FLOWERING LOCUS T (FT) C (FLC). Conclusion Our study highlight tree. The genomic regions covered detected represent valuable resources investigations genome-wide association functional genomics studies. These findings will provide information applying selection develop new varieties adapted projections.

Language: Английский

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