Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm
Early crop vigour in canola, as in other crops, is likely to result in greater competition with weeds, more rapid canopy closure, improved nutrient acquisition, improved water-use efficiency, and, potentially, greater final grain yield. Laborious measurements of crop biomass over time can be replace...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
CSIRO
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/25865 |
| _version_ | 1848751825392500736 |
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| author | Cowley, R. Luckett, D. Moroni, J. Diffey, Simon |
| author_facet | Cowley, R. Luckett, D. Moroni, J. Diffey, Simon |
| author_sort | Cowley, R. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Early crop vigour in canola, as in other crops, is likely to result in greater competition with weeds, more rapid canopy closure, improved nutrient acquisition, improved water-use efficiency, and, potentially, greater final grain yield. Laborious measurements of crop biomass over time can be replaced with newer remote-sensing technology to aid data acquisition. Normalised difference vegetation index (NDVI) is a surrogate for biomass accumulation that can be recorded rapidly and repeatedly with inexpensive equipment. In seven small-plot field experiments conducted over a 4-year period with diverse canola germplasm (n = 105), we have shown that NDVI measures are well correlated with final grain yield. We found NDVI values were most correlated with yield (r >0.7) if readings were taken when the crop had received 210-320 growing degree-days (usually the mid-vegetative phase of growth). It is suggested that canola breeders may use NDVI to objectively select for vigorous genotypes that are more likely to have higher grain yields. |
| first_indexed | 2025-11-14T07:58:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-25865 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:58:53Z |
| publishDate | 2014 |
| publisher | CSIRO |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-258652017-09-13T15:24:21Z Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm Cowley, R. Luckett, D. Moroni, J. Diffey, Simon Early crop vigour in canola, as in other crops, is likely to result in greater competition with weeds, more rapid canopy closure, improved nutrient acquisition, improved water-use efficiency, and, potentially, greater final grain yield. Laborious measurements of crop biomass over time can be replaced with newer remote-sensing technology to aid data acquisition. Normalised difference vegetation index (NDVI) is a surrogate for biomass accumulation that can be recorded rapidly and repeatedly with inexpensive equipment. In seven small-plot field experiments conducted over a 4-year period with diverse canola germplasm (n = 105), we have shown that NDVI measures are well correlated with final grain yield. We found NDVI values were most correlated with yield (r >0.7) if readings were taken when the crop had received 210-320 growing degree-days (usually the mid-vegetative phase of growth). It is suggested that canola breeders may use NDVI to objectively select for vigorous genotypes that are more likely to have higher grain yields. 2014 Journal Article http://hdl.handle.net/20.500.11937/25865 10.1071/CP14055 CSIRO restricted |
| spellingShingle | Cowley, R. Luckett, D. Moroni, J. Diffey, Simon Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm |
| title | Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm |
| title_full | Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm |
| title_fullStr | Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm |
| title_full_unstemmed | Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm |
| title_short | Use of remote sensing to determine the relationship of early vigour to grain yield in canola (Brassica napus L.) germplasm |
| title_sort | use of remote sensing to determine the relationship of early vigour to grain yield in canola (brassica napus l.) germplasm |
| url | http://hdl.handle.net/20.500.11937/25865 |