Articles
SELECTING DISEASE RESISTANT PLANT MATERIAL FOR APPLE AND GRAPEVINE BREEDING
Article number
1100_27
Pages
173 – 176
Language
English
Abstract
Fungal diseases are the main treatment targets in both apple and grapevine
cultivation.
The availability and combination of highly tolerant or moderately susceptible
accessions can be a valuable option to improve the control of these diseases in the
respect of the environment.
In apple, the breeding programme of Laimburg Research
Centre was so far focused on quality traits.
Starting with 2013, marker-assisted seedling
selection (MASS) is performed to identify resistances against scab, powdery mildew or
fireblight.
A continuously optimised genotyping procedure is focused on a maximal time
and cost efficiency, allowing a high throughput of seedlings to be analysed.
Selected
plants will account for both the development of new resistant varieties and the creation
of future pyramidised breeding material.
In grapevine, a disease resistant collection is
going to be created in collaboration with private platforms and nurseries, with
interesting hybrids released by breeding programmes around the World.
In order to
select the parents segregating for resistance genes for new crosses, the collection is going
to be screened with markers correlated with downy and powdery mildew resistance
(marker-assisted parental selection, MAPS). Resistances to other less prevalent diseases
have been considered, including Pierces disease, crown gall and phylloxera.
Bioassays
under controlled inoculation are planned to provide a better understanding of the
stability of the disease resistance as a function of the genetic background and environment.
cultivation.
The availability and combination of highly tolerant or moderately susceptible
accessions can be a valuable option to improve the control of these diseases in the
respect of the environment.
In apple, the breeding programme of Laimburg Research
Centre was so far focused on quality traits.
Starting with 2013, marker-assisted seedling
selection (MASS) is performed to identify resistances against scab, powdery mildew or
fireblight.
A continuously optimised genotyping procedure is focused on a maximal time
and cost efficiency, allowing a high throughput of seedlings to be analysed.
Selected
plants will account for both the development of new resistant varieties and the creation
of future pyramidised breeding material.
In grapevine, a disease resistant collection is
going to be created in collaboration with private platforms and nurseries, with
interesting hybrids released by breeding programmes around the World.
In order to
select the parents segregating for resistance genes for new crosses, the collection is going
to be screened with markers correlated with downy and powdery mildew resistance
(marker-assisted parental selection, MAPS). Resistances to other less prevalent diseases
have been considered, including Pierces disease, crown gall and phylloxera.
Bioassays
under controlled inoculation are planned to provide a better understanding of the
stability of the disease resistance as a function of the genetic background and environment.
Authors
T. Letschka, E. Zini, C. Kerschbamer, J. Terleth, W. Guerra, B. Raifer
Keywords
Malus × domestica, Vitis vinifera, marker assisted selection, pyramidisation
Online Articles (27)