Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids
The rationale for the following research was to analyse the response of sunflower hybrids to different sowing dates and to evaluate hybrid response to critical environmental conditions. The data used are from an experiment conducted in a location-year combination over a period of two years (2007–09)...
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | International Journal of Agronomy |
| Online Access: | http://dx.doi.org/10.1155/2010/637928 |
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| author | V. Alba G. B. Polignano C. Montemurro W. Sabetta V. Bisignano M. Turi S. Ravaglia A. Troccoli S. A. Colecchia E. Alba A. Blanco |
| author_facet | V. Alba G. B. Polignano C. Montemurro W. Sabetta V. Bisignano M. Turi S. Ravaglia A. Troccoli S. A. Colecchia E. Alba A. Blanco |
| author_sort | V. Alba |
| collection | DOAJ |
| description | The rationale for the following research was to analyse the response of sunflower hybrids to different sowing dates and to evaluate hybrid response to critical environmental conditions. The data used are from an experiment conducted in a location-year combination over a period of two years (2007–09) in southern Italy. Eleven hybrids were tested following a randomized complete block design with three replications at each location-year combination. Eight agronomic characters including seed oil content were recorded. Classification and ordination procedures were used to investigate hybrid performance in relation to three different sowing dates. Combined analysis of variance showed that hybrids, location-year combination, sowing date and their interactions were highly significant for all characters. Hybrid performances were classified by cluster analysis into groups that were differentiable in terms of means and stability. The first three components accounted for 74%, 82%, and 87% of the total variation for the first, second and third sowing date respectively. Plotting component one against component two along Euclidean axes should therefore provide a reasonable representation of the spatial arrangements of hybrid performances in the original multi-dimensional space. The applied statistical method gives full information on hybrid performances similarity. |
| format | Article |
| id | doaj-art-7bf8409a166a4499b0dd187cb9fc3e01 |
| institution | Kabale University |
| issn | 1687-8159 1687-8167 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Agronomy |
| spelling | doaj-art-7bf8409a166a4499b0dd187cb9fc3e012025-02-03T01:32:09ZengWileyInternational Journal of Agronomy1687-81591687-81672010-01-01201010.1155/2010/637928637928Similarity Patterns and Stability of Environmental Response in Sunflower HybridsV. Alba0G. B. Polignano1C. Montemurro2W. Sabetta3V. Bisignano4M. Turi5S. Ravaglia6A. Troccoli7S. A. Colecchia8E. Alba9A. Blanco10Section of Genetics and Breeding, Di.B.C.A., University of Bari, 70126 Bari, ItalyInstitute of Plant Genetics, CNR, 70126 Bari, ItalySection of Genetics and Breeding, Di.B.C.A., University of Bari, 70126 Bari, ItalySection of Genetics and Breeding, Di.B.C.A., University of Bari, 70126 Bari, ItalyInstitute of Plant Genetics, CNR, 70126 Bari, ItalyUniversity Farm “A. Servadei”, University of Udine, 33100 Udine, ItalySocietà Italiana Sementi (S.I.S.), Bologna, 40068 San Lazzaro di Savena, ItalyCereal Research Centre, CRA, 71122 Foggia, ItalyCereal Research Centre, CRA, 71122 Foggia, ItalyDepartment of Biology Biotechnology and Agro-Forestry, University of Basilicata, 85100 Potenza, ItalySection of Genetics and Breeding, Di.B.C.A., University of Bari, 70126 Bari, ItalyThe rationale for the following research was to analyse the response of sunflower hybrids to different sowing dates and to evaluate hybrid response to critical environmental conditions. The data used are from an experiment conducted in a location-year combination over a period of two years (2007–09) in southern Italy. Eleven hybrids were tested following a randomized complete block design with three replications at each location-year combination. Eight agronomic characters including seed oil content were recorded. Classification and ordination procedures were used to investigate hybrid performance in relation to three different sowing dates. Combined analysis of variance showed that hybrids, location-year combination, sowing date and their interactions were highly significant for all characters. Hybrid performances were classified by cluster analysis into groups that were differentiable in terms of means and stability. The first three components accounted for 74%, 82%, and 87% of the total variation for the first, second and third sowing date respectively. Plotting component one against component two along Euclidean axes should therefore provide a reasonable representation of the spatial arrangements of hybrid performances in the original multi-dimensional space. The applied statistical method gives full information on hybrid performances similarity.http://dx.doi.org/10.1155/2010/637928 |
| spellingShingle | V. Alba G. B. Polignano C. Montemurro W. Sabetta V. Bisignano M. Turi S. Ravaglia A. Troccoli S. A. Colecchia E. Alba A. Blanco Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids International Journal of Agronomy |
| title | Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids |
| title_full | Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids |
| title_fullStr | Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids |
| title_full_unstemmed | Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids |
| title_short | Similarity Patterns and Stability of Environmental Response in Sunflower Hybrids |
| title_sort | similarity patterns and stability of environmental response in sunflower hybrids |
| url | http://dx.doi.org/10.1155/2010/637928 |
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