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Assessment of Spring Barley Populations in Comparison to Homogenous Varieties

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Ločmele, Indra; Legzdina, Linda; Piliksere, Dace; Gaile, Zinta and Kronberga, Arta (2019) Assessment of Spring Barley Populations in Comparison to Homogenous Varieties. Speech at:

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Summary

The necessity to increase genetic diversity in agriculture has been widely discussed during the last decades.
Heterogeneous populations is one of the ways to increase genetic diversity in varieties of self-pollinating cereals. The
aim of this research was to compare grain yield, its stability, foliar diseases severity and competitiveness against the
weeds of spring barley (Hordeum vulgare) populations and homogenous varieties. Field trials consisting of three types
of populations (simple, complex and composite cross populations – CCP) containing different levels of diversity and three check varieties were carried out during 2015-2018 under organic and conventional farming systems. No one of the populations had a significantly higher average yield than any of the check varieties. CCP1 showed a tendency to be more productive under organic growing conditions and can be characterized as widely adaptable to various growing conditions with a significantly higher yield as the average overall environments. One of the complex populations showed adaptability to favorable growing conditions and yield insignificantly higher than overall average. Other studied populations can be characterized with wide adaptability and various yield levels. For most of the populations under organic and conventional conditions, a significantly lower net blotch (caused by Pyrenophora teres) severity was observed in comparison with the most susceptible variety; infection with powdery mildew (caused by Blumeria graminis) lower than for check varieties was observed under organic growing conditions, whereas such trend was not observed under conventional conditions. All populations had a significantly lower crop ground cover and slightly lower competiveness against weeds than the variety with the best competitiveness.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Speech
Keywords:Populations, yield, yield stability, leaf diseases, competitiveness against weeds
Subjects: Crop husbandry > Breeding, genetics and propagation
Research affiliation: European Union > Horizon 2020 > Liveseed
Latvia
H2020 or FP7 Grant Agreement Number:727230
Deposited By: Legzdina, Dr. Linda
ID Code:37004
Deposited On:18 Jan 2020 08:40
Last Modified:18 Jan 2020 08:40
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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