Paternal outcrossing success differs among faba bean genotypes and impacts breeding of synthetic cultivars
| Autor: | Lisa Brünjes, Wolfgang Link |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Heterosis Outcrossing Biology medicine.disease_cause 010603 evolutionary biology 01 natural sciences Inbred strain Gene Expression Regulation Plant Pollen Genetics medicine Cultivar Hybrid Plant Proteins food and beverages Genetic Variation General Medicine Vicia faba Plant Breeding Agronomy Original Article Agronomy and Crop Science Inbreeding 010606 plant biology & botany Biotechnology |
| Zdroj: | TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik |
| ISSN: | 1432-2242 0040-5752 |
| Popis: | Key message Faba bean genotypes showed significant and marked genetic differences in their success as pollen donors to cross-fertilized seeds. The findings may improve exploitation of heterosis in synthetic cultivars. Abstract In partially allogamous crops such as faba bean (Vicia faba L.), increasing the share of heterosis in a synthetic cultivar can improve yield and yield stability. The share of heterosis in such synthetic cultivars is increased by higher degrees of cross-fertilization. This trait is defined as percentage of cross-fertilized seeds among all seeds and is a crucial parameter in breeders’ yield predictions. Current approaches use degree of cross-fertilization to predict inbreeding and share of heterosis, they even consider genotype-specific degrees; yet, all genotypes are assumed to contribute equally to the cross-fertilized seeds. Here, we expect faba bean genotypes to differ in their success rates as pollen donors, i.e. in paternal outcrossing success. To quantify the variation of both, the degree of cross-fertilization and the paternal outcrossing success, we assessed these parameters in inbred lines and F1 hybrids, grown in four polycrosses composed of eight genotypes each. We identified the paternal genotype of 500 to 800 seeds per genotype and polycross using SNP markers. In both traits, we found marked and significant variation among inbred lines and among F1 hybrids, as well as between inbred lines and F1. Based on our findings, we discuss how differential paternal outcrossing success influences the amount of inbreeding in synthetic cultivars. Our findings offer the potential for a better management and exploitation of heterotic yield increase in faba bean. |
| Databáze: | OpenAIRE |
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