Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential
Today wheat cultivation is facing rapidly changing climate scenarios and yield instability, aggravated by the spreading of severe diseases such as Fusarium head blight (FHB) and Fusarium crown rot (FCR). To obtain productive genotypes resilient to stress pressure, smart breeding approaches must be e...
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| Format: | Article |
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MDPI AG
2021-03-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/10/3/579 |
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| author | Ljiljana Kuzmanović Gloria Giovenali Roberto Ruggeri Francesco Rossini Carla Ceoloni |
| author_facet | Ljiljana Kuzmanović Gloria Giovenali Roberto Ruggeri Francesco Rossini Carla Ceoloni |
| author_sort | Ljiljana Kuzmanović |
| collection | DOAJ |
| description | Today wheat cultivation is facing rapidly changing climate scenarios and yield instability, aggravated by the spreading of severe diseases such as Fusarium head blight (FHB) and Fusarium crown rot (FCR). To obtain productive genotypes resilient to stress pressure, smart breeding approaches must be envisaged, including the exploitation of wild relatives. Here we report on the assessment of the breeding potential of six durum wheat-<i>Thinopyrum</i> spp. recombinant lines (RLs) obtained through chromosome engineering. They are characterized by having 23% or 28% of their 7AL chromosome arm replaced by a “nested” alien segment, composed of homoeologous group 7 chromosome fractions from <i>Th. ponticum</i> and <i>Th. elongatum</i> (=7el<sub>1</sub>L + 7EL) or from different <i>Th. ponticum</i> accessions (=7el<sub>1</sub>L + 7el<sub>2</sub>L). In addition to the 7el<sub>1</sub>L genes <i>Lr19 + Yp</i> (leaf rust resistance, and yellow pigment content, respectively), these recombinant lines (RLs) possess a highly effective QTL for resistance to FHB and FCR within their 7el<sub>2</sub>L or 7EL portion. The RLs, their null segregants and well-adapted and productive durum wheat cultivars were evaluated for 16 yield-related traits over two seasons under rainfed and irrigated conditions. The absence of yield penalties and excellent genetic stability of RLs was revealed in the presence of all the alien segment combinations. Both 7el<sub>2</sub>L and 7EL stacked introgressions had positive impacts on source and sink yield traits, as well as on the overall performance of RLs in conditions of reduced water availability. The four “nested” RLs tested in 2020 were among the top five yielders, overall representing good candidates to be employed in breeding programs to enhance crop security and safety. |
| first_indexed | 2024-03-10T13:05:29Z |
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| id | doaj.art-1b575577ecb14c43bb800abb2204cea4 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T13:05:29Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-1b575577ecb14c43bb800abb2204cea42023-11-21T11:07:11ZengMDPI AGPlants2223-77472021-03-0110357910.3390/plants10030579Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield PotentialLjiljana Kuzmanović0Gloria Giovenali1Roberto Ruggeri2Francesco Rossini3Carla Ceoloni4Department of Agriculture and Forestry Science, University of Tuscia, 01100 Viterbo, ItalyDepartment of Agriculture and Forestry Science, University of Tuscia, 01100 Viterbo, ItalyDepartment of Agriculture and Forestry Science, University of Tuscia, 01100 Viterbo, ItalyDepartment of Agriculture and Forestry Science, University of Tuscia, 01100 Viterbo, ItalyDepartment of Agriculture and Forestry Science, University of Tuscia, 01100 Viterbo, ItalyToday wheat cultivation is facing rapidly changing climate scenarios and yield instability, aggravated by the spreading of severe diseases such as Fusarium head blight (FHB) and Fusarium crown rot (FCR). To obtain productive genotypes resilient to stress pressure, smart breeding approaches must be envisaged, including the exploitation of wild relatives. Here we report on the assessment of the breeding potential of six durum wheat-<i>Thinopyrum</i> spp. recombinant lines (RLs) obtained through chromosome engineering. They are characterized by having 23% or 28% of their 7AL chromosome arm replaced by a “nested” alien segment, composed of homoeologous group 7 chromosome fractions from <i>Th. ponticum</i> and <i>Th. elongatum</i> (=7el<sub>1</sub>L + 7EL) or from different <i>Th. ponticum</i> accessions (=7el<sub>1</sub>L + 7el<sub>2</sub>L). In addition to the 7el<sub>1</sub>L genes <i>Lr19 + Yp</i> (leaf rust resistance, and yellow pigment content, respectively), these recombinant lines (RLs) possess a highly effective QTL for resistance to FHB and FCR within their 7el<sub>2</sub>L or 7EL portion. The RLs, their null segregants and well-adapted and productive durum wheat cultivars were evaluated for 16 yield-related traits over two seasons under rainfed and irrigated conditions. The absence of yield penalties and excellent genetic stability of RLs was revealed in the presence of all the alien segment combinations. Both 7el<sub>2</sub>L and 7EL stacked introgressions had positive impacts on source and sink yield traits, as well as on the overall performance of RLs in conditions of reduced water availability. The four “nested” RLs tested in 2020 were among the top five yielders, overall representing good candidates to be employed in breeding programs to enhance crop security and safety.https://www.mdpi.com/2223-7747/10/3/579chromosome engineeringbreedingpre-breedingalien introgressionhomoeologous recombinationgrain number |
| spellingShingle | Ljiljana Kuzmanović Gloria Giovenali Roberto Ruggeri Francesco Rossini Carla Ceoloni Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential Plants chromosome engineering breeding pre-breeding alien introgression homoeologous recombination grain number |
| title | Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential |
| title_full | Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential |
| title_fullStr | Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential |
| title_full_unstemmed | Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential |
| title_short | Small “Nested” Introgressions from Wild <i>Thinopyrum</i> Species, Conferring Effective Resistance to Fusarium Diseases, Positively Impact Durum Wheat Yield Potential |
| title_sort | small nested introgressions from wild i thinopyrum i species conferring effective resistance to fusarium diseases positively impact durum wheat yield potential |
| topic | chromosome engineering breeding pre-breeding alien introgression homoeologous recombination grain number |
| url | https://www.mdpi.com/2223-7747/10/3/579 |
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