Abstract
Early generation selection (EGS) in wheat (Triticum aestivum L.) aims to accelerate genetic yield gain by identifying lines with high potential yield in the F2 or F3 generation. Three experiments wereconducted near Birchip in northwest Victoria to evaluate EGS in spaced single F3 winter wheat plants using harvest index (HI; single plant yield/plant weight). In 2018, 440 F3 single winter wheat plants and 10 plots of pooled family seed were planted. 21 single plant lines were selected for high HI and 52 were selected randomly; 25 culms were selected from plots based on visual characteristics. These lines were planted in a partially replicated plot experiment at Birchip in 2019. In 2019, lines selected for HI had a higher plot yield (457 g/m2) than lines selected visually (375 g/m2) or randomly (368 g/m2). There was moderate correlation between F3 single plant HI and F4 plot yield (r2 = 0.17). The seven highest-yielding lines from each selection treatment were sown in a replicated plot experiment at Curyo in 2020 and there was no difference in yield between selection groups. Results suggest that applying high selection pressure for HI in early generations can accelerate yield gain in winter wheat.
| Original language | English |
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| Title of host publication | System Solutions for Complex Problems |
| Subtitle of host publication | Proceedings of the 20th Australian Agronomy Conference |
| Editors | L. Bell, C. Bhagirath |
| Place of Publication | Queensland |
| Publisher | Australian Society of Agronomy |
| Number of pages | 4 |
| Publication status | Published - 2022 |
| Event | 20th Australian Agronomy Conference - Empire Theatre, Toowoomba, Australia Duration: 18 Sept 2022 → 22 Sept 2022 https://agronomyconference.com/2022-conference/ (Conference website ) https://www.agronomyaustraliaproceedings.org/index.php/2022 (Proceedings) |
Conference
| Conference | 20th Australian Agronomy Conference |
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| Abbreviated title | System solutions for complex problems |
| Country/Territory | Australia |
| City | Toowoomba |
| Period | 18/09/22 → 22/09/22 |
| Other | The theme of the conference is System Solutions for Complex Problems. The theme underpins the need to strengthen collaborations between practitioners and researchers from a wide range of disciplinary backgrounds to address increasingly complex problems and uncertainties. So, the question is not If, but when and how, multidisciplinary collaborations will be developed. The 20th Australian Agronomy Conference will feature leading international and national speakers addressing issues such as the need to foster soil biology for enduring profitability, carbon sequestration, herbicide resistance, and the interwoven relationships between food production, energy and the environment. We will discuss and share our latest research findings amongst circa 300 agronomists from Australia and the world, as well as farmers, consultants, agribusinesses and farmer peak bodies. |
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