Collaborative project: Broadening the genetic base and developing new (selection-) strategies for hybrid barley breeding. Subproject 7 (SpeedBarley)
Project code: 2818202315, JKI-RS-08-3402
Contract period: 01.02.2017 - 28.02.2019
Budget: 146,893 Euro
Purpose of research: Applied research
Keywords: barley, H. bulbosum
Hybrids are gaining increasing importance in barley and are contributing to an improved yield and yield stability as well as an enhanced nutrient and water use efficiency. In SpeedBarley the genetic base in winter barley breeding will be broadened by crossings to spring barley as a prerequisite for the formation of heterotic pools. Segregating populations are going to be developed in order to map flowering traits with relevance for hybrid breeding and are tested under defined environmental conditions. Furthermore, an innovative strategy for the development of female lines based on protoplast fusions between H. vulgare and H. bulbosum will be developed. Respective genotypes will be crossed in a next step to high yielding lines followed by marker based selection at the very beginning of line development, already.
The objective of SpeedBarley is to broaden the genetic base in hybrid breeding of winter barley and to investigate the influence of drought stress on the fertility of CMS lines. After testing of 12 lines (6 microNAM parental lines unconverted, 6 converted into CMS plasma) applied drought stress results in a slight but not significant (p=0.08) decrease of fertility restauration in the trait kernels/plant of the CMS lines. CMS-Amrai and CMS-Fridericus increase the number of kernels/triple spikelet at drought stress, whereas that trait is decreased at CMS-BE2009082014D, CMS-Laverda, and CMS-Merle.
WP 1: Broadening the genetic base of breeding winter barley hybrids by crosses of winter x spring barley
WP2: Get information on the genetics of fertility restauration
WP3: Optimising of asymetric protoplast fusion for an enhanced development of female lines in cms cytoplasm.