Ppe.CR.1 DNA test for predicting chilling requirement in peach

Demirel, Gizem; Calle, Alejandro; Lawton, John Mark; Atagul, Omer; Fu, Wanfang; Gašić, Ksenija

doi:10.21203/rs.3.rs-2160810/v1

Cited by 2 publications

(2 citation statements)

References 39 publications

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“…Both markers were developed from the extra-early cultivar 'Cristobalina' for the detection of structural mutations (within the DAM genes region) associated to early FD and low CRs in sweet cherry (Calle et al, 2021). More recently, in peach, KASP markers were developed in the region spanning from 43.58 to 43.78 Mb on the chromosome 1 (Pp01) and validated to predict CRs (Demirel et al, 2023). These markers, located near the DAM genes, are located 1 Mb upstream from those that we developed within the LG1 QTL (orthologous positions of KASP_LG1_50.880 and KASP_LG1_52.362 on the peach chromosome 1 are 44.60 Mb and 45.78 Mb, respectively).…”

Section: Qtl×e Interactions and Masmentioning

confidence: 99%

Genotype-by-environment and QTL-by-environment interactions in sweet cherry (Prunus avium L.) for flowering date

Branchereau

Hardner²,

Dirlewanger³

et al. 2023

Front. Plant Sci.

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In sweet cherry (Prunus avium L.), flowering date is strongly dependent on the environment conditions and, therefore, is a trait of major interest for adaptation to climate change. Such trait can be influenced by genotype-by-environment interaction (G×E), that refers to differences in the response of genotypes to different environments. If not taken into account, G×E can reduce selection accuracy and overall genetic gain. However, little is known about G×E in fruit tree species. Flowering date is a highly heritable and polygenic trait for which many quantitative trait loci (QTLs) have been identified. As for the overall genetic performance, differential expression of QTLs in response to environment (QTL-by-environment interaction, QTL×E) can occur. The present study is based on the analysis of a multi-environment trial (MET) suitable for the study of G×E and QTL×E in sweet cherry. It consists of a sweet cherry F1 full-sib family (n = 121) derived from the cross between cultivars ‘Regina’ and ‘Lapins’ and planted in two copies in five locations across four European countries (France, Italy, Slovenia and Spain) covering a large range of climatic conditions. The aim of this work was to study the effect of the environment on flowering date and estimate G×E, to carry QTL detection in different environments in order to study the QTL stability across environments and to estimate QTL×E. A strong effect of the environment on flowering date and its genetic control was highlighted. Two large-effect and environment-specific QTLs with significant QTL×E were identified on linkage groups (LGs) 1 and 4. This work gives new insights into the effect of the environment on a trait of main importance in one of the most economically important fruit crops in temperate regions. Moreover, molecular markers were developed for flowering date and a strategy consisting in using specific markers for warm or cold regions was proposed to optimize marker-assisted selection (MAS) in sweet cherry breeding programs.

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Section: Qtl×e Interactions and Masmentioning

confidence: 99%

Genotype-by-environment and QTL-by-environment interactions in sweet cherry (Prunus avium L.) for flowering date

Branchereau

Hardner²,

Dirlewanger³

et al. 2023

Front. Plant Sci.

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show abstract

“…The trees used in the study were 7 -10 years old, grafted on Guardian® rootstock and trained as perpendicular V or opencenter vase. Chilling requirement (CR) in chill hours (CH), bloom dates in Julian date (JD), and heat requirement (HR) in growing degree hours (GDH) for this material were previously described in Demirel et al [27] and Atagul et al [28].…”

Section: Peach and Nectarine Germplasmmentioning

confidence: 99%

Fruitlet Freeze Tolerance in Peach Germplasm

Caglar,

Lawton,

Melgar

et al. 2023

Preprint

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Climate change is affecting the production of temperate fruit crops. Freeze damage, particularly in spring, has resulted in significant economic losses in peach production in the southeastern United States. Research efforts in peach and other Prunus species have primarily focused on dormancy-related traits associated with bloom time, such as chill and heat requirement, with fruitlet freeze tolerance not equally represented. This study reports fruitlet freeze tolerance in 75 peach and nectarine accessions at six freezing temperatures (0 to -10ºC) using electrolyte leakage method over two seasons (2022-2023). Fruitlet freeze tolerance ranged from -3.94 to -10.22 °C with an estimated damage ranging from 16-48% with the majority of the accessions showing tolerance to cold temperatures in the -4 to -6ºC and 25-35% range. Variability in tolerance was noted across years, including some inconsistencies between tolerance group assignments. Grouping based on the estimated damage showed better stability and some accessions changed their grouping from the extremes to an intermediate tolerance group. Interestingly, nectarine accessions were among most tolerant in both seasons. Broad-sense heritability of 0.52 and 0.85, for freeze tolerance and estimated damage, respectively, suggested genetic control of this trait with a potential for improvement via breeding.

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Ppe.CR.1 DNA test for predicting chilling requirement in peach

Cited by 2 publications

References 39 publications

Genotype-by-environment and QTL-by-environment interactions in sweet cherry (Prunus avium L.) for flowering date

Genotype-by-environment and QTL-by-environment interactions in sweet cherry (Prunus avium L.) for flowering date

Fruitlet Freeze Tolerance in Peach Germplasm

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