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Prediction model for breeding hardy geraniums

Mehrdad Akbarzadeh (UGent) , Paul Quataert, Johan Van Huylenbroeck, Stefaan Werbrouck (UGent) and Emmy Dhooghe (UGent)
(2023) HORTICULTURAE. 9(6).
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Abstract
Key message. The success of interspecific hybridization in hardy geranium (Geranium sp.) can be predicted by considering the genetic distance between parental genotypes and using the logistic regression model developed in this study. Hardy geranium is a popular ornamental plant known for its architecture, hardiness, prolonged flowering, and diverse colors in leaves and flowers. In ornamental breeding, the pursuit of novel trait combinations is never-ending. Even in Geranium, certain combinations of valuable traits have not yet been achieved. Interspecific hybridization can increase diversity; however, success remains low due to pre- and postzygotic barriers. Crossing success can be predicted by response criteria such as pollen tube growth (tube_length), seed development (seed_dev), and seed setting (seed_set). Within a collection of 42 Geranium genotypes and during two consecutive breeding seasons (years), we evaluated tube_length, seed_dev, and seed_set for 150, 1155, and 349 crosses, respectively. These crosses varied in four parental differences (variables): chromosome number (Chrom), DNA/chromosome (DNA), style length (Style), and genetic distance expressed as the Jaccard distance (cJaccard = 1 − Jaccard). Using logistic regression models has confirmed that most often, the success rate decreased with increasing parental distance. The most consistent association was seen in seed_dev in combination with cJaccard. The model was used to predict the number of crosses necessary to have 10 successful crossing products by taking into account the uncertainty in the model. These findings provide valuable guidance for future planning of interspecific breeding experiments in Geranium. By incorporating the genetic distance between parental genotypes, breeders can enhance the efficiency and success of hybridization efforts.
Keywords
Geraniaceae, incongruity, interspecific hybridization, Jaccard, pollen tube, pre- and postzygotic barriers, POLLEN-TUBE, EMBRYO RESCUE, HYBRIDIZATION, HYBRIDS, POLYPLOIDIZATION, FERTILIZATION, ARABIDOPSIS, CALLOSE, GROWTH, TOOLS

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MLA
Akbarzadeh, Mehrdad, et al. “Prediction Model for Breeding Hardy Geraniums.” HORTICULTURAE, vol. 9, no. 6, 2023, doi:10.3390/horticulturae9060617.
APA
Akbarzadeh, M., Quataert, P., Van Huylenbroeck, J., Werbrouck, S., & Dhooghe, E. (2023). Prediction model for breeding hardy geraniums. HORTICULTURAE, 9(6). https://doi.org/10.3390/horticulturae9060617
Chicago author-date
Akbarzadeh, Mehrdad, Paul Quataert, Johan Van Huylenbroeck, Stefaan Werbrouck, and Emmy Dhooghe. 2023. “Prediction Model for Breeding Hardy Geraniums.” HORTICULTURAE 9 (6). https://doi.org/10.3390/horticulturae9060617.
Chicago author-date (all authors)
Akbarzadeh, Mehrdad, Paul Quataert, Johan Van Huylenbroeck, Stefaan Werbrouck, and Emmy Dhooghe. 2023. “Prediction Model for Breeding Hardy Geraniums.” HORTICULTURAE 9 (6). doi:10.3390/horticulturae9060617.
Vancouver
1.
Akbarzadeh M, Quataert P, Van Huylenbroeck J, Werbrouck S, Dhooghe E. Prediction model for breeding hardy geraniums. HORTICULTURAE. 2023;9(6).
IEEE
[1]
M. Akbarzadeh, P. Quataert, J. Van Huylenbroeck, S. Werbrouck, and E. Dhooghe, “Prediction model for breeding hardy geraniums,” HORTICULTURAE, vol. 9, no. 6, 2023.
@article{01H1KYX266G422F7XYCHPYGJTE,
  abstract     = {{ Key message. The success of interspecific hybridization in hardy geranium (Geranium sp.) can be predicted by considering the genetic distance between parental genotypes and using the logistic regression model developed in this study. Hardy geranium is a popular ornamental plant known for its architecture, hardiness, prolonged flowering, and diverse colors in leaves and flowers. In ornamental breeding, the pursuit of novel trait combinations is never-ending. Even in Geranium, certain combinations of valuable traits have not yet been achieved. Interspecific hybridization can increase diversity; however, success remains low due to pre- and postzygotic barriers. Crossing success can be predicted by response criteria such as pollen tube growth (tube_length), seed development (seed_dev), and seed setting (seed_set). Within a collection of 42 Geranium genotypes and during two consecutive breeding seasons (years), we evaluated tube_length, seed_dev, and seed_set for 150, 1155, and 349 crosses, respectively. These crosses varied in four parental differences (variables): chromosome number (Chrom), DNA/chromosome (DNA), style length (Style), and genetic distance expressed as the Jaccard distance (cJaccard = 1 − Jaccard). Using logistic regression models has confirmed that most often, the success rate decreased with increasing parental distance. The most consistent association was seen in seed_dev in combination with cJaccard. The model was used to predict the number of crosses necessary to have 10 successful crossing products by taking into account the uncertainty in the model. These findings provide valuable guidance for future planning of interspecific breeding experiments in Geranium. By incorporating the genetic distance between parental genotypes, breeders can enhance the efficiency and success of hybridization efforts.}},
  articleno    = {{617}},
  author       = {{Akbarzadeh, Mehrdad and Quataert, Paul and Van Huylenbroeck, Johan and Werbrouck, Stefaan and Dhooghe, Emmy}},
  issn         = {{2311-7524}},
  journal      = {{HORTICULTURAE}},
  keywords     = {{Geraniaceae,incongruity,interspecific hybridization,Jaccard,pollen tube,pre- and postzygotic barriers,POLLEN-TUBE,EMBRYO RESCUE,HYBRIDIZATION,HYBRIDS,POLYPLOIDIZATION,FERTILIZATION,ARABIDOPSIS,CALLOSE,GROWTH,TOOLS}},
  language     = {{eng}},
  number       = {{6}},
  pages        = {{12}},
  title        = {{Prediction model for breeding hardy geraniums}},
  url          = {{http://doi.org/10.3390/horticulturae9060617}},
  volume       = {{9}},
  year         = {{2023}},
}
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