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Mathias-Ramwell M, Pavez V, Meneses M, Fernández F, Valdés A, Lobos I, Silva M, Saldaña R, Hinrichsen P. Phenotypic and genetic characterization of an Avena sativa L. germplasm collection of diverse origin: implications for food-oat breeding in Chile. FRONTIERS IN PLANT SCIENCE 2023; 14:1298591. [PMID: 38179484 PMCID: PMC10764548 DOI: 10.3389/fpls.2023.1298591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 12/05/2023] [Indexed: 01/06/2024]
Abstract
Oats are known for their nutritional value and also for their beneficial properties on human health, such as the reduction of cholesterol levels and risk of coronary heart disease; they are an important export product for Chile. During the last decade (2010-2022) over 90% of the oat cultivated area in Chile has been covered with Avena sativa L. cv. Supernova INIA. This lack of genetic diversity in a context of climate change could limit the long-term possibility of growing oats in Chile. The present study is a phenotypic and genetic analysis of 132 oat cultivars and pure lines of diverse origin that can be considered as potential breeding material. The germplasm was evaluated for 28 traits and analyzed with 14 SSR markers. The effects of genotypes on phenotype were significant over all traits (P ≤ 0.05). Most traits exhibited moderate to high broad-sense heritability with exceptions such as yield (H2 = 0.27) and hulls staining (H2 = 0.32). Significant undesirable correlations between traits were generally of small biological importance, which is auspicious for achieving breeding objectives. Some of the heritability data and correlations provided here have not been previously reported. The overall phenotypic diversity was high (H' = 0.68 ± 0.18). The germplasm was grouped into three phenotypic clusters, differing in their qualities for breeding. Twenty-six genotypes outperforming Supernova INIA were identified for breeding of conventional food-oats. The genetic diversity of the germplasm was moderate on average (He = 0.58 ± 0.03), varying between 0.32 (AM22) and 0.77 (AME178). Two genetic subpopulations supported by the Structure algorithm exhibited a genetic distance of 0.24, showing low divergence of the germplasm. The diversity and phenotypic values found in this collection of oat genotypes are promising with respect to obtaining genetic gain in the short term in breeding programs. However, the similar genetic diversity, higher phenotypic diversity, and better phenotypic performance of the germplasm created in Chile compared to foreign germplasm suggest that germplasm harboring new genetic diversity will be key to favor yield and quality in new oat cultivars in the long term.
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Affiliation(s)
- Mónica Mathias-Ramwell
- Programa de mejoramiento genético de avena, Instituto de Investigaciones Agropecuarias (INIA), Centro Regional de Investigación Carillanca, Temuco, Chile
| | - Valentina Pavez
- Laboratorio de Análisis Genético, Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación La Platina, Santiago, Chile
| | - Marco Meneses
- Laboratorio de Análisis Genético, Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación La Platina, Santiago, Chile
| | - Feledino Fernández
- Programa de mejoramiento genético de avena, Instituto de Investigaciones Agropecuarias (INIA), Centro Regional de Investigación Carillanca, Temuco, Chile
| | - Adriana Valdés
- Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco, Chile
| | - Iris Lobos
- Laboratorio de Espectroscopía Infrarrojo Cercano, Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación Remehue, Osorno, Chile
| | - Mariela Silva
- Laboratorio de Espectroscopía Infrarrojo Cercano, Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación Remehue, Osorno, Chile
| | - Rodolfo Saldaña
- Laboratorio de Nutrición Animal y Medio Ambiente, Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación Remehue, Osorno, Chile
| | - Patricio Hinrichsen
- Laboratorio de Análisis Genético, Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación La Platina, Santiago, Chile
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Salem KFM, Alghuthaymi MA, Elabd AB, Elabsawy EA, Mierah HH. Prediction of Heterosis for Agronomic Traits in Half-Diallel Cross of Rice ( Oryza sativa L.) under Drought Stress Using Microsatellite Markers. PLANTS (BASEL, SWITZERLAND) 2022; 11:1532. [PMID: 35736683 PMCID: PMC9229443 DOI: 10.3390/plants11121532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 05/27/2022] [Accepted: 06/06/2022] [Indexed: 06/15/2023]
Abstract
Rice breeders are encouraged to classify potential F1-hybrids without crossing all viable mixtures by testing depending on genetic distance due to lack of labor and time in yield trials. The goals of this research were to establish heterosis and investigate the relationship between genomic distance and agronomic attributes under drought. Half-diallel mating design, 28 F1′s and 8 parents were evaluated under drought and genotyped using 11 microsatellite markers. In total, 39 alleles were detected. Results indicated that the greatest heterotic effects for grain yield were observed in Sakha 103 × Sakha 104 and GZ7576-10-3-2-1 × Giza 179, which gave 29.32−22.57% heterosis, respectively. Heterosis for grain yield in these crosses occurred as a rise in panicle weight, filled grains per panicle, low sterility and 100-grain weight. Correlations of marker-based genetic distance with mid-parent heterosis were positively and significantly correlated with sterility percentage (r = 0.390 *, p < 0.05). However, better-parent heterosis was positively and significantly correlated with sterility percentage (r = 0.352 *, p < 0.05) and grain yield per plant (r = 0.345 *, p < 0.05). Associations indicate that high grain yield and low sterility of rice crosses can be expected from microsatellite marker-defined distances of parents. This study indicated that genetic distance is very effective for heterosis prediction in breeding programs.
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Affiliation(s)
- Khaled F. M. Salem
- Plant Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat City, Sadat City 22857, Egypt;
- Biology Department, Science and Humanities College, Shaqra University, Alquwayiyah 11726, Saudi Arabia
| | - Mousa A. Alghuthaymi
- Biology Department, Science and Humanities College, Shaqra University, Alquwayiyah 11726, Saudi Arabia
| | - Abdelmoaty B. Elabd
- Field Crops Research Institute, Agricultural Research Center (ARC), Giza 33717, Egypt;
| | - Elsayed A. Elabsawy
- Bioinformatics Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat City, Sadat City 22857, Egypt;
| | - Hossam H. Mierah
- Plant Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), University of Sadat City, Sadat City 22857, Egypt;
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