Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems
Spotted medics (Medicago arabica) have become naturalised in Australia, but the spiny nature of their pods has prevented commercial release of any cultivar. Fifty-eight accessions representing Medicago arabica in the Australian Medicago Genetic Resources Collection were grown as spaced plants at Tur...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
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CSIRO Publishing
2006
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| Online Access: | http://hdl.handle.net/20.500.11937/14096 |
| _version_ | 1848748529435017216 |
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| author | Nair, Ramakrishnan Hughes, Steve Peck, David Crocker, Graham Ellwood, Simon Hill, Jeffrey Hunt, Colleen Auricht, Geoffrey |
| author_facet | Nair, Ramakrishnan Hughes, Steve Peck, David Crocker, Graham Ellwood, Simon Hill, Jeffrey Hunt, Colleen Auricht, Geoffrey |
| author_sort | Nair, Ramakrishnan |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Spotted medics (Medicago arabica) have become naturalised in Australia, but the spiny nature of their pods has prevented commercial release of any cultivar. Fifty-eight accessions representing Medicago arabica in the Australian Medicago Genetic Resources Collection were grown as spaced plants at Turretfield, South Australia, and the variation for important agronomic traits was studied. There was large variation for traits including days to flowering, dry matter production, pod and seed yield, and pod spininess. Principal component and cluster analyses conducted for 13 traits revealed 5 clusters. One of the clusters identified comprised accessions originating from Greece and Cyprus, which were found to have high agronomic potential. The study has helped in identifying the relationship among traits, namely pod spininess, days to flowering, dry matter yield, and pod and seed yield, which would be useful to breeders for future breeding and selection programs. A sward trial at Moree, New South Wales, comprising a selected cohort of spotted medic accessions, enabled the identification of 2 early flowering and high dry matter yielding accessions; however, both exhibited spiny pods. These 2 accessions were crossed with a smooth-podded accession, and the F1 plants were confirmed using a microsatellite marker. Days to flowering showed a continuous pattern of variation in the F2, suggesting that the trait is quantitatively inherited, whereas segregation ratio revealed that a single recessive gene controlled the smooth pod trait. Early flowering, smooth-podded F2 plants were selected for cultivar development. |
| first_indexed | 2025-11-14T07:06:29Z |
| format | Journal Article |
| id | curtin-20.500.11937-14096 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:06:29Z |
| publishDate | 2006 |
| publisher | CSIRO Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-140962017-09-13T15:57:39Z Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems Nair, Ramakrishnan Hughes, Steve Peck, David Crocker, Graham Ellwood, Simon Hill, Jeffrey Hunt, Colleen Auricht, Geoffrey diversity analysis pod spininess ?owering core collection microsatellite marker Spotted medics (Medicago arabica) have become naturalised in Australia, but the spiny nature of their pods has prevented commercial release of any cultivar. Fifty-eight accessions representing Medicago arabica in the Australian Medicago Genetic Resources Collection were grown as spaced plants at Turretfield, South Australia, and the variation for important agronomic traits was studied. There was large variation for traits including days to flowering, dry matter production, pod and seed yield, and pod spininess. Principal component and cluster analyses conducted for 13 traits revealed 5 clusters. One of the clusters identified comprised accessions originating from Greece and Cyprus, which were found to have high agronomic potential. The study has helped in identifying the relationship among traits, namely pod spininess, days to flowering, dry matter yield, and pod and seed yield, which would be useful to breeders for future breeding and selection programs. A sward trial at Moree, New South Wales, comprising a selected cohort of spotted medic accessions, enabled the identification of 2 early flowering and high dry matter yielding accessions; however, both exhibited spiny pods. These 2 accessions were crossed with a smooth-podded accession, and the F1 plants were confirmed using a microsatellite marker. Days to flowering showed a continuous pattern of variation in the F2, suggesting that the trait is quantitatively inherited, whereas segregation ratio revealed that a single recessive gene controlled the smooth pod trait. Early flowering, smooth-podded F2 plants were selected for cultivar development. 2006 Journal Article http://hdl.handle.net/20.500.11937/14096 10.1071/AR05269 CSIRO Publishing restricted |
| spellingShingle | diversity analysis pod spininess ?owering core collection microsatellite marker Nair, Ramakrishnan Hughes, Steve Peck, David Crocker, Graham Ellwood, Simon Hill, Jeffrey Hunt, Colleen Auricht, Geoffrey Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems |
| title | Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems |
| title_full | Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems |
| title_fullStr | Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems |
| title_full_unstemmed | Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems |
| title_short | Progress in development of spotted medics (Medicago arabica L. Huds.) for Mediterranean farming systems |
| title_sort | progress in development of spotted medics (medicago arabica l. huds.) for mediterranean farming systems |
| topic | diversity analysis pod spininess ?owering core collection microsatellite marker |
| url | http://hdl.handle.net/20.500.11937/14096 |