Agronomic Performance of Heterogeneous Spring Barley Populations Compared with Mixtures of Their Parents and Homogeneous Varieties

Diversity within a crop of self-pollinating species can provide advantages in sustainable farming, including the ability to adapt to environments. However, few results proving the benefits in various species and climatic conditions are available. Our aim was to find the differences between heterogen...

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Bibliographic Details
Published in:Sustainability 2022-08, Vol.14 (15), p.9697
Main Authors: Legzdiņa, Linda, Bleidere, Māra, Piliksere, Dace, Ločmele, Indra
Format: Article
Language:English
Subjects:
20th century
Abiotic stress
Adaptation
Agricultural production
Barley
Climatic conditions
Competitiveness
Crop diseases
Farm buildings
Farmers
Genetic diversity
Grain
Mixtures
Net blotch
Nutrient content
Plant reproduction
Population
Populations
Proteins
Seeds
Stability
Sustainability
Sustainable agriculture
Trends
Wheat
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Summary:Diversity within a crop of self-pollinating species can provide advantages in sustainable farming, including the ability to adapt to environments. However, few results proving the benefits in various species and climatic conditions are available. Our aim was to find the differences between heterogeneous and homogeneous materials and determine if crossing has advantage over mixing. We compared essential traits of twelve heterogeneous spring barley composite cross populations (CCPs) to those of seven mixtures representing similar genetic backgrounds and five homogeneous varieties in nine organic and three conventional environments over the course of three years. We found significant advantages for heterogeneous materials, particularly CCPs, for yield in organic and stress environments as well as yield stability, N utilisation efficiency, protein content, 1000-grain weight, and net blotch severity and observed positive trends for N uptake efficiency and weed competitiveness. CCPs’ advantages over mixtures were for protein content and 1000-grain weight, a nonsignificant yield gain in low-yield and stress environments, higher yield stability, and minor positive trends for net blotch, NUE, and weed competitiveness. We suggest heterogeneous populations as valuable alternatives to uniform varieties for organic and poor cultivation environments. Although multi-component mixtures could provide a performance similar to CCPs, considering the adaptation potential, populations would be more advantageous overall.
ISSN:2071-1050
2071-1050
DOI:10.3390/su14159697