The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of Australia
Chromosomal translocations in wheat derived from alien species are a valuable source of genetic diversity that have provided increases in resistance to various diseases and improved tolerance to abiotic stresses in wheat. These alien genomic segments can also affect multiple traits, with a concomita...
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MDPI AG
2015-02-01
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| Series: | Agronomy |
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| Online Access: | http://www.mdpi.com/2073-4395/5/1/55 |
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| author | Garry Rosewarne David Bonnett Greg Rebetzke Paul Lonergan Philip J. Larkin |
| author_facet | Garry Rosewarne David Bonnett Greg Rebetzke Paul Lonergan Philip J. Larkin |
| author_sort | Garry Rosewarne |
| collection | DOAJ |
| description | Chromosomal translocations in wheat derived from alien species are a valuable source of genetic diversity that have provided increases in resistance to various diseases and improved tolerance to abiotic stresses in wheat. These alien genomic segments can also affect multiple traits, with a concomitant ability to alter yield potential in either a positive or negative fashion. The aim of this work was to characterize the effects on yield of two types of translocations, namely T4-derived translocations from Thinopyrum ponticum, carrying the leaf rust resistance gene Lr19, and the TC14 translocation from Th. intermedium, carrying the barley yellow dwarf virus resistance gene Bdv2, in Australian adapted genetic backgrounds and under Australian conditions. A large range of germplasm was developed by crossing donor sources of the translocations into 24 Australian adapted varieties producing 340 genotypes. Yield trials were conducted in 14 environments to identify effects on yield and yield components. The T4 translocations had a positive effect on yield in one high yielding environment, but negatively affected yield in low-yielding environments. The TC14 translocation was generally benign, however, it was associated with a negative impact on yield and reduced height in two genetic backgrounds. The translocation was also associated with a delayed maturity in several backgrounds. The T4 translocations results were consistent with previously published data, whilst this is the first time that such an investigation has been undertaken on the TC14 translocation. Our data suggests a limited role for each of these translocations in Australia. The T4 translocations may be useful in high yielding environments, such as under irrigation in NSW and in the more productive high rainfall regions of south-eastern Australia. Traits associated with the TC14 translocation, such as BYDV resistance and delayed maturity, would make this translocation useful in BYDV-prone areas that experience a less pronounced terminal drought (e.g., south-eastern Australia). |
| first_indexed | 2024-12-14T17:35:01Z |
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| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-12-14T17:35:01Z |
| publishDate | 2015-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-a82bebb4d4044811a5cd9e065f40f0142022-12-21T22:53:00ZengMDPI AGAgronomy2073-43952015-02-0151557010.3390/agronomy5010055agronomy5010055The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of AustraliaGarry Rosewarne0David Bonnett1Greg Rebetzke2Paul Lonergan3Philip J. Larkin4CSIRO Agriculture Flagship, Clunies Ross St, Black Mountain, Canberra 2601, AustraliaCSIRO Agriculture Flagship, Clunies Ross St, Black Mountain, Canberra 2601, AustraliaCSIRO Agriculture Flagship, Clunies Ross St, Black Mountain, Canberra 2601, AustraliaCSIRO Agriculture Flagship, Clunies Ross St, Black Mountain, Canberra 2601, AustraliaCSIRO Agriculture Flagship, Clunies Ross St, Black Mountain, Canberra 2601, AustraliaChromosomal translocations in wheat derived from alien species are a valuable source of genetic diversity that have provided increases in resistance to various diseases and improved tolerance to abiotic stresses in wheat. These alien genomic segments can also affect multiple traits, with a concomitant ability to alter yield potential in either a positive or negative fashion. The aim of this work was to characterize the effects on yield of two types of translocations, namely T4-derived translocations from Thinopyrum ponticum, carrying the leaf rust resistance gene Lr19, and the TC14 translocation from Th. intermedium, carrying the barley yellow dwarf virus resistance gene Bdv2, in Australian adapted genetic backgrounds and under Australian conditions. A large range of germplasm was developed by crossing donor sources of the translocations into 24 Australian adapted varieties producing 340 genotypes. Yield trials were conducted in 14 environments to identify effects on yield and yield components. The T4 translocations had a positive effect on yield in one high yielding environment, but negatively affected yield in low-yielding environments. The TC14 translocation was generally benign, however, it was associated with a negative impact on yield and reduced height in two genetic backgrounds. The translocation was also associated with a delayed maturity in several backgrounds. The T4 translocations results were consistent with previously published data, whilst this is the first time that such an investigation has been undertaken on the TC14 translocation. Our data suggests a limited role for each of these translocations in Australia. The T4 translocations may be useful in high yielding environments, such as under irrigation in NSW and in the more productive high rainfall regions of south-eastern Australia. Traits associated with the TC14 translocation, such as BYDV resistance and delayed maturity, would make this translocation useful in BYDV-prone areas that experience a less pronounced terminal drought (e.g., south-eastern Australia).http://www.mdpi.com/2073-4395/5/1/55translocationswheatLr19Bdv2Thinopyrum ponticumThinopyrum intermedium |
| spellingShingle | Garry Rosewarne David Bonnett Greg Rebetzke Paul Lonergan Philip J. Larkin The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of Australia Agronomy translocations wheat Lr19 Bdv2 Thinopyrum ponticum Thinopyrum intermedium |
| title | The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of Australia |
| title_full | The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of Australia |
| title_fullStr | The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of Australia |
| title_full_unstemmed | The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of Australia |
| title_short | The Potential of Lr19 and Bdv2 Translocations to Improve Yield and Disease Resistance in the High Rainfall Wheat Zones of Australia |
| title_sort | potential of lr19 and bdv2 translocations to improve yield and disease resistance in the high rainfall wheat zones of australia |
| topic | translocations wheat Lr19 Bdv2 Thinopyrum ponticum Thinopyrum intermedium |
| url | http://www.mdpi.com/2073-4395/5/1/55 |
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