|
|
|
|
|
| Lammerts van Bueren, E. T.; Jones, S.S.; Tamm, L.; Murphy, K.M.; Myers, J. R; Leifert, C.; Messmer, M.. |
| It is estimated that more than 95% of organic production is based on crop varieties that were bred for the conventional high-input sector. Recent studies have shown that such varieties lack important traits required under organic and low-input production conditions. This is primarily due to selection in conventional breeding programmes being carried out in the background of high inorganic fertilizer and crop protection inputs. Also, some of the traits (e.g., semi-dwarf genes) that were introduced to address problems like lodging in cereals in high-input systems were shown to have negative side-effects (reduced resistance to diseases such as Septoria, lower protein content and poorer nutrient-use efficiency) on the performance of varieties under organic and... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Vegetables Breeding; Genetics and propagation Crop health; Quality; Protection. |
| Ano: 2011 |
URL: http://orgprints.org/17861/1/LammertsvanBueren_et_al_NJAS_wheat%2C_tomato%2C_broccoli.pdf |
| |
|
|
| Dawson, J.C.; Murphy, K.M.; Jones, S.S.. |
| Improving crop nitrogen use efficiency (NUE) is important to reducing the environmental impacts of agriculture, for both perennial and annual crops. This study tested winter wheat breeding lines developed in organic and conventional systems, historic wheat varieties and perennial wheat under organic management. There were significant differences among selection categories and among genotypes. However, standard methods of measuring NUE may not be appropriate when the breeding objectives are to reduce N use. Alternative methods of evaluating breeding materials, including regression analysis of grain protein deviation (GPD) and principal component analysis (PCA) were explored. GPD was not found to discriminate well between genotypes in this study, but PCA... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Systems research and participatory research Breeding; Genetics and propagation Farm nutrient management. |
| Ano: 2008 |
URL: http://orgprints.org/12053/1/dawson_12053_ed.doc |
| |
|
|
|
