Collection |

Rosaceae genomics

Dear Rosaceae community,

We have collected Rosaceae genomics articles that have published in Horticulture Research, which we hope to be useful to you when you coordinate future projects utilizing the data for gene discovery and characterization. We hope it will inspire you to consider to publish your next most exciting discoveries in Hort. Res.

Best wishes with your research.

Horticulture Research

Featured Articles

  • Horticulture Research | Review Article | open

    Collaborative programs and training are needed to connect the rapid advances in genetics and genomics with crop breeding programs. Cameron Peace of Washington State University has reviewed the integration of DNA-based information into breeding programs of rosaceous crops, such as apples, almonds, roses, and strawberries. While DNA-informed breeding has become conventional, Peace notes that a gap separates modern genomics discoveries from their practical application by breeders. To bridge this gap, he recommends adjustments by both researchers and breeders to establish a middle ground where discoveries are translated into tools. This requires breeders to be aware of the state of the art and how it can improve their programs, and scientists to be familiar with breeders' needs and to develop cost-effective, timely, and predictive tests. Systematic cooperation and communication will accelerate the development of improved new varieties.

    • Cameron P Peace
  • Horticulture Research | Article | open

    A new 'map' showing the relative position of genes in the genome of apple (Malus × domestica) provides a foundation for future breeding. Accurate knowledge of gene order is essential for modern genetic studies and plant breeding programmes. For apple, the existing information was inadequate. Eric van de Weg of Wageningen University and Research in The Netherlands and colleagues combined multiple approaches to produce the most informative, reliable genetic map for apple to date. Compared to existing maps, their 'iGLMap' is based on a wider range of trees, contains fewer gaps and incorporates the largest number of genes. It has already been used to refine the apple genome sequence and in studies of the genes underlying fruit characteristics. The research validates this method of making genetic maps, which could be applied to many other horticultural species.

    • Erica A Di Pierro
    • , Luca Gianfranceschi
    • , Mario Di Guardo
    • , Herma JJ Koehorst-van Putten
    • , Johannes W Kruisselbrink
    • , Sara Longhi
    • , Michela Troggio
    • , Luca Bianco
    • , Hélène Muranty
    • , Giulia Pagliarani
    • , Stefano Tartarini
    • , Thomas Letschka
    • , Lidia Lozano Luis
    • , Larisa Garkava-Gustavsson
    • , Diego Micheletti
    • , Marco CAM Bink
    • , Roeland E Voorrips
    • , Ebrahimi Aziz
    • , Riccardo Velasco
    • , François Laurens
    •  &  W Eric van de Weg
  • Horticulture Research | Article | open

    The rose genome has been mapped in greater detail than ever, and a new method to determine hybrid plants' parentage developed. A Dutch team, led by Rene Smulders of Wageningen University, planned to cross two roses, 'Morden Centennial' and 'Red New Dawn,' and map the resulting hybrid's genome. However, the crossed population displayed unexpected traits. Using genetic differences at DNA sites known as 'single nucleotide polymorphisms,' the team determined the heritage of this population. They found not only crosses of 'Morden Centennial' and 'Red New Dawn', but also 'Red New Dawn' with an unknown parent, and self-fertilized 'Red New Dawn'. This evidence for self-fertilization in roses presents both challenges and opportunities for breeders. The team generated three genetic maps, the most detailed for the self-fertilized plants, supporting further genomic analysis and cultivar development in roses.

    • Mirjana Vukosavljev
    • , Paul Arens
    • , Roeland E Voorrips
    • , Wendy PC van ‘t Westende
    • , GD Esselink
    • , Peter M Bourke
    • , Peter Cox
    • , W Eric van de Weg
    • , Richard GF Visser
    • , Chris Maliepaard
    •  &  Marinus JM Smulders
  • Horticulture Research | Article | open

    An exploration of multiple methods for analysing genomic data suggests a strategy for accelerating strawberry breeding. It is becoming widely accepted that 'genomic selection' can be more efficient than growing crops until mature to determine their commercially significant traits, particularly for perennial horticultural crops. However, there are multiple methods for predicting traits of interest from genetic data. Vance Whitaker and colleagues at the University of Florida tested several methods on a population of over 1,600 strawberry plants, using almost 17,500 genetic markers and six traits including total yield and fruit weight. Their results detail the accuracy of the various methods at predicting a particular plant's characteristics from its genome. They suggest this will help to significantly reduce the time needed for selection of complex traits in strawberries.

    • Salvador A Gezan
    • , Luis F Osorio
    • , Sujeet Verma
    •  &  Vance M Whitaker
  • Horticulture Research | Article | open

    Identifying the genes underlying the apple disorder 'soft scald' could lead to more storable varieties that can be eaten all year round. When apples are stored at low temperatures, fruits may suffer from sunken, darkened patches known as 'soft scald.' Sean Myles of Dalhousie University, Truro, Canada, and colleagues used modern genomic sequencing methods to map the genome of two hybrid apple populations. This enabled them to 'quantitative trait loci' (QTLs), with small effects on susceptibility to soft scald. Together, multiple QTLs can have a large, additive effect. They may provide starting points for 'marker assisted selection', in which genes are selected at the seedling stage before the trees show mature characteristics. The hope is to generate apples that can be cold stored for many months without deleterious effects.

    • Kendra A McClure
    • , Kyle M Gardner
    • , Peter MA Toivonen
    • , Cheryl R Hampson
    • , Jun Song
    • , Charles F Forney
    • , John DeLong
    • , Istvan Rajcan
    •  &  Sean Myles
  • Horticulture Research | Article | open

    A newly identified deleterious effect in cross-bred pears could be prevented by identifying the genetic regions involved. Adverse interactions between genes from the two parents of a hybrid—akin to an autoimmune response—can cause dwarfing, tissue damage and death, a phenomenon known as hybrid necrosis. Although recognized in several plant species, it has not before been seen in pears. An international team led by David Chagné of the New Zealand Institute for Plant and Food Research identified two types of hybrid necrosis in pears. Using modern genetic screening techniques, they then located two interacting gene regions causing ‘Type 1’ necrosis, and one implicated in ‘Type 2’; a second region remains to be identified. Their discoveries may shed light on the evolutionary history of pears, and will help breeders select compatible parents when breeding new varieties.

    • Sara Montanari
    • , Lester Brewer
    • , Robert Lamberts
    • , Riccardo Velasco
    • , Mickael Malnoy
    • , Laure Perchepied
    • , Philippe Guérif
    • , Charles-Eric Durel
    • , Vincent G M Bus
    • , Susan E Gardiner
    •  &  David Chagné