Genetic and phenotypic analyses reveal major quantitative loci associated to fruit size and shape traits in a non-flat peach collection ... View Full Text


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Article Info

DATE

2021-11-01

AUTHORS

Marco Cirilli, Irina Baccichet, Remo Chiozzotto, Cristian Silvestri, Laura Rossini, Daniele Bassi

ABSTRACT

Fruit size and shape are critical agronomical and pomological attributes and prime targets in peach breeding programs. Apart from the flat peach type, a Mendelian trait well-characterized at the genetic level, ample diversity of fruit size and shapes is present across peach germplasms. Nevertheless, knowledge of the underlying genomic loci remains limited. In this work, fruit size and shape were assessed in a collection of non-flat peach accessions and selections, under controlled fruit load conditions. The architecture of these traits was then dissected by combining association and linkage mapping, revealing a major locus on the proximal end of chromosome 6 (qSHL/Fs6.1) explaining a large proportion of phenotypic variability for longitudinal shape and also affecting fruit size. A second major locus for fruit longitudinal shape (qSHL5.1), probably also affecting fruit size, was found co-localizing at locus G, suggesting pleiotropic effects of peach/nectarine traits. An additional QTL for fruit longitudinal shape (qSHL6.2) was identified in the distal end of chromosome 6 in a cross with an ornamental double-flower peach and co-localized with the Di2 locus, controlling flower morphology. Besides assisting breeding activities, knowledge of loci controlling fruit size and shape paves the way for more in-depth studies aimed at the identification of underlying genetic variant(s). More... »

PAGES

232

References to SciGraph publications

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  • 2020-08-01. Defining strawberry shape uniformity using 3D imaging and genetic mapping in HORTICULTURE RESEARCH
  • 2009-11-01. Phenotypic diversity and relationships of fruit quality traits in peach and nectarine [Prunus persica (L.) Batsch] breeding progenies in EUPHYTICA
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  • 2000. Quantitative evaluation of apple (Malus × domestica Borkh.) fruit shape by principal component analysis of Fourier descriptors in EUPHYTICA
  • 2017-06-06. Integrated QTL detection for key breeding traits in multiple peach progenies in BMC GENOMICS
  • 2021-06-19. Many candidates for a single chair: a critical review of the genetic determinant of flat fruit shape trait in peach (Prunus persica L. Batsch) in TREE GENETICS & GENOMES
  • 2012-08-05. Genetic dissection of aroma volatile compounds from the essential oil of peach fruit: QTL analysis and identification of candidate genes using dense SNP maps in TREE GENETICS & GENOMES
  • 2016-03-17. QTL mapping and breeding value estimation through pedigree-based analysis of fruit size and weight in four diverse peach breeding programs in TREE GENETICS & GENOMES
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/s41438-021-00661-5

    DOI

    http://dx.doi.org/10.1038/s41438-021-00661-5

    DIMENSIONS

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    PUBMED

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    30 schema:description Fruit size and shape are critical agronomical and pomological attributes and prime targets in peach breeding programs. Apart from the flat peach type, a Mendelian trait well-characterized at the genetic level, ample diversity of fruit size and shapes is present across peach germplasms. Nevertheless, knowledge of the underlying genomic loci remains limited. In this work, fruit size and shape were assessed in a collection of non-flat peach accessions and selections, under controlled fruit load conditions. The architecture of these traits was then dissected by combining association and linkage mapping, revealing a major locus on the proximal end of chromosome 6 (qSHL/Fs6.1) explaining a large proportion of phenotypic variability for longitudinal shape and also affecting fruit size. A second major locus for fruit longitudinal shape (qSHL5.1), probably also affecting fruit size, was found co-localizing at locus G, suggesting pleiotropic effects of peach/nectarine traits. An additional QTL for fruit longitudinal shape (qSHL6.2) was identified in the distal end of chromosome 6 in a cross with an ornamental double-flower peach and co-localized with the Di2 locus, controlling flower morphology. Besides assisting breeding activities, knowledge of loci controlling fruit size and shape paves the way for more in-depth studies aimed at the identification of underlying genetic variant(s).
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    37 QTL
    38 accessions
    39 activity
    40 additional QTL
    41 ample diversity
    42 analysis
    43 architecture
    44 association
    45 attributes
    46 breeding activity
    47 breeding programs
    48 chromosome 6
    49 collection
    50 conditions
    51 cross
    52 depth study
    53 distal end
    54 diversity
    55 effect
    56 end
    57 flower morphology
    58 fruit load conditions
    59 fruit size
    60 genetic level
    61 genomic loci
    62 germplasm
    63 identification
    64 knowledge
    65 large proportion
    66 levels
    67 linkage mapping
    68 load conditions
    69 loci
    70 longitudinal shape
    71 major locus
    72 major quantitative locus
    73 mapping
    74 morphology
    75 peach
    76 peach accessions
    77 peach breeding programs
    78 peach germplasm
    79 peach types
    80 phenotypic analysis
    81 phenotypic variability
    82 pleiotropic effects
    83 prime target
    84 program
    85 proportion
    86 proximal end
    87 quantitative loci
    88 second major locus
    89 selection
    90 shape
    91 shape traits
    92 size
    93 study
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    95 traits
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    100 schema:name Genetic and phenotypic analyses reveal major quantitative loci associated to fruit size and shape traits in a non-flat peach collection (P. persica L. Batsch)
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