Crossing of Alphonse Lavallee and Regent Grape Cultivars for Downy Mildew Resistant Genotypes. 1. Seed Germination and Seedling Growth
Abstract
Crossing for disease resistance of grape cultivars
is one of the main interests of grape breeding. Downy mildew is one of the
destructive diseases of grapevines. V. vinifera
has superior characteristics for wine or fresh consumption but mildew
sensitive. Vinifera grapevines are cross with American wild grapes to
obtain resistant cultivars. But some hybrid grapes have low seed germination.
The main goal of this study was to develop hybrid table grape F1 offsprings
with resistance to downy mildew disease and to test seed characteristics of
them. Alphonse Lavalle (susceptible) and Regent (resistant) grape cultivars
were crossed to obtain resistant F1 progenies. Hybrid seeds were soaked in
gibberellic acid (GA3, 1 000 ppm), Benzylaminopurine (BAP, 1 000
ppm) and hydrogen peroxide (H2O2, 1 M) solutions and
water (control) for 24 hours after stratification (4 months at 5oC)
and then sown in Perlite : Peat moss (1:1) potting soil. Germination was
carried out in the plastic boxes with constant temperature (27oC)
and relative humidity (99%). Total germination ranged from 60.39% to 78.32% in
the control and GA3 treated seeds respectively. Also, GA3 significantly
increased total germination when compared to the other treatments. Optimization
of growth chamber, greenhouse and open field conditions for seed germination
and seedling growth accelerated shoot growth up to 2 m in offsprings at the
first year.
Keywords
References
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Details
Primary Language
English
Subjects
Horticultural Production
Journal Section
Research Article
Authors
Halil İbrahim Uzun
*
Türkiye
Nuray Özer
Türkiye
Murat Akkurt
This is me
Cengiz Özer
This is me
Türkiye
Serkan Aydın
This is me
Türkiye
Publication Date
May 31, 2019
Submission Date
September 26, 2018
Acceptance Date
December 13, 2018
Published in Issue
Year 2019 Volume: 29
