Factors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil content
Oilseed rape yield potential could be improved lengthening the duration of the late reproductive phase by increasing the number of grains per unit area. Photoperiod sensitivity could be used as a tool to manipulate the reproductive phase and thereby the number of grains. The aim of this study was to assess [i] the effects of different combinations of photoperiod on the duration of different phases and [ii] analyze how the changes in that duration affect yield [and its components] as well as oil seed content in oilseed rape. Field experiments were conducted in a factorial combination of three cultivars and three photoperiod regimes: natural photoperiod [NP] which represents the control and extended photoperiod of 6h over NP [NP+6] during emergence [E]-flower buds visible [FBV] and FBV-maturity [M] arranged in a randomized complete block design with three replicates, during two years representing three environments. Results showed that oilseed rape evidenced photoperiod responses during vegetative and early reproductive phases. Due to the lack of correlation between the duration of the vegetative and reproductive phases, it is possible to speculate the vegetative period may be altered independently of the modification of the rest of the phases. The positive relationship between grain number per m2 and the duration of the late reproductive phase suggests that yield could be increased by lengthening the duration of that phase. Thus, regardless of the effect on the previous phase, the photoperiod sensitivity found in the early reproductive phase opens the possibility to manipulate the relative durations of vegetative and reproductive phases. Therefore, the length of the reproductive phase will be increased at the expense of a reduction in the duration of the vegetative phase, but without changing the whole duration of the crop cycle. This strategy could increase yield in oilseed rape in the future. Variations in yield were mostly explained by changes in the grain number per unit area without significant correlation with grain weight. However, a negative relationship between grain weight and grain number was found, showing a slight counterbalance in yield, by decreasing the grain weight. Since oil concentration appeared to be a more conservative attribute, increases in crop yield through a higher grain number per unit area would be a suitable strategy for improving oil yield as no reductions in oil concentration can be expected.
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Subjects: | GRAIN WEIGHT, CROP DEVELOPMENT, GRAIN WEIGHTS, NUMBER OF GRAINS, RAPESEED, YIELD, CROPS, PLANTS [BOTANY], OILSEEDS, AGRICULTURAL DEVELOPMENT, BIOCHEMICAL COMPOSITION, BUD, CROP YIELD, CULTIVAR, DICOTYLEDON, EMERGENCE, ESSENTIAL OIL, EXPERIMENTAL STUDY, MATURATION, PHOTOPERIOD, PHYTOCHEMISTRY, WEIGHT, YIELD RESPONSE, BRASSICA NAPUS, |
Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46838 |
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GRAIN WEIGHT CROP DEVELOPMENT GRAIN WEIGHTS NUMBER OF GRAINS RAPESEED YIELD CROPS PLANTS [BOTANY] OILSEEDS AGRICULTURAL DEVELOPMENT BIOCHEMICAL COMPOSITION BUD CROP YIELD CULTIVAR DICOTYLEDON EMERGENCE ESSENTIAL OIL EXPERIMENTAL STUDY MATURATION PHOTOPERIOD PHYTOCHEMISTRY WEIGHT YIELD RESPONSE BRASSICA NAPUS GRAIN WEIGHT CROP DEVELOPMENT GRAIN WEIGHTS NUMBER OF GRAINS RAPESEED YIELD CROPS PLANTS [BOTANY] OILSEEDS AGRICULTURAL DEVELOPMENT BIOCHEMICAL COMPOSITION BUD CROP YIELD CULTIVAR DICOTYLEDON EMERGENCE ESSENTIAL OIL EXPERIMENTAL STUDY MATURATION PHOTOPERIOD PHYTOCHEMISTRY WEIGHT YIELD RESPONSE BRASSICA NAPUS |
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GRAIN WEIGHT CROP DEVELOPMENT GRAIN WEIGHTS NUMBER OF GRAINS RAPESEED YIELD CROPS PLANTS [BOTANY] OILSEEDS AGRICULTURAL DEVELOPMENT BIOCHEMICAL COMPOSITION BUD CROP YIELD CULTIVAR DICOTYLEDON EMERGENCE ESSENTIAL OIL EXPERIMENTAL STUDY MATURATION PHOTOPERIOD PHYTOCHEMISTRY WEIGHT YIELD RESPONSE BRASSICA NAPUS GRAIN WEIGHT CROP DEVELOPMENT GRAIN WEIGHTS NUMBER OF GRAINS RAPESEED YIELD CROPS PLANTS [BOTANY] OILSEEDS AGRICULTURAL DEVELOPMENT BIOCHEMICAL COMPOSITION BUD CROP YIELD CULTIVAR DICOTYLEDON EMERGENCE ESSENTIAL OIL EXPERIMENTAL STUDY MATURATION PHOTOPERIOD PHYTOCHEMISTRY WEIGHT YIELD RESPONSE BRASSICA NAPUS Gómez, Nora Valentina Miralles, Daniel Julio Factors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil content |
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Oilseed rape yield potential could be improved lengthening the duration of the late reproductive phase by increasing the number of grains per unit area. Photoperiod sensitivity could be used as a tool to manipulate the reproductive phase and thereby the number of grains. The aim of this study was to assess [i] the effects of different combinations of photoperiod on the duration of different phases and [ii] analyze how the changes in that duration affect yield [and its components] as well as oil seed content in oilseed rape. Field experiments were conducted in a factorial combination of three cultivars and three photoperiod regimes: natural photoperiod [NP] which represents the control and extended photoperiod of 6h over NP [NP+6] during emergence [E]-flower buds visible [FBV] and FBV-maturity [M] arranged in a randomized complete block design with three replicates, during two years representing three environments. Results showed that oilseed rape evidenced photoperiod responses during vegetative and early reproductive phases. Due to the lack of correlation between the duration of the vegetative and reproductive phases, it is possible to speculate the vegetative period may be altered independently of the modification of the rest of the phases. The positive relationship between grain number per m2 and the duration of the late reproductive phase suggests that yield could be increased by lengthening the duration of that phase. Thus, regardless of the effect on the previous phase, the photoperiod sensitivity found in the early reproductive phase opens the possibility to manipulate the relative durations of vegetative and reproductive phases. Therefore, the length of the reproductive phase will be increased at the expense of a reduction in the duration of the vegetative phase, but without changing the whole duration of the crop cycle. This strategy could increase yield in oilseed rape in the future. Variations in yield were mostly explained by changes in the grain number per unit area without significant correlation with grain weight. However, a negative relationship between grain weight and grain number was found, showing a slight counterbalance in yield, by decreasing the grain weight. Since oil concentration appeared to be a more conservative attribute, increases in crop yield through a higher grain number per unit area would be a suitable strategy for improving oil yield as no reductions in oil concentration can be expected. |
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Texto |
topic_facet |
GRAIN WEIGHT CROP DEVELOPMENT GRAIN WEIGHTS NUMBER OF GRAINS RAPESEED YIELD CROPS PLANTS [BOTANY] OILSEEDS AGRICULTURAL DEVELOPMENT BIOCHEMICAL COMPOSITION BUD CROP YIELD CULTIVAR DICOTYLEDON EMERGENCE ESSENTIAL OIL EXPERIMENTAL STUDY MATURATION PHOTOPERIOD PHYTOCHEMISTRY WEIGHT YIELD RESPONSE BRASSICA NAPUS |
author |
Gómez, Nora Valentina Miralles, Daniel Julio |
author_facet |
Gómez, Nora Valentina Miralles, Daniel Julio |
author_sort |
Gómez, Nora Valentina |
title |
Factors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil content |
title_short |
Factors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil content |
title_full |
Factors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil content |
title_fullStr |
Factors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil content |
title_full_unstemmed |
Factors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil content |
title_sort |
factors that modify early and late reproductive phases in oilseed rape [brassica napus l.] its impact on seed yield and oil content |
url |
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46838 |
work_keys_str_mv |
AT gomeznoravalentina factorsthatmodifyearlyandlatereproductivephasesinoilseedrapebrassicanapuslitsimpactonseedyieldandoilcontent AT mirallesdanieljulio factorsthatmodifyearlyandlatereproductivephasesinoilseedrapebrassicanapuslitsimpactonseedyieldandoilcontent |
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1756046696815525888 |
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KOHA-OAI-AGRO:468382022-09-15T10:15:15Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46838AAGFactors that modify early and late reproductive phases in oilseed rape [Brassica napus L.] its impact on seed yield and oil contentGómez, Nora ValentinaMiralles, Daniel Juliotextengapplication/pdfOilseed rape yield potential could be improved lengthening the duration of the late reproductive phase by increasing the number of grains per unit area. Photoperiod sensitivity could be used as a tool to manipulate the reproductive phase and thereby the number of grains. The aim of this study was to assess [i] the effects of different combinations of photoperiod on the duration of different phases and [ii] analyze how the changes in that duration affect yield [and its components] as well as oil seed content in oilseed rape. Field experiments were conducted in a factorial combination of three cultivars and three photoperiod regimes: natural photoperiod [NP] which represents the control and extended photoperiod of 6h over NP [NP+6] during emergence [E]-flower buds visible [FBV] and FBV-maturity [M] arranged in a randomized complete block design with three replicates, during two years representing three environments. Results showed that oilseed rape evidenced photoperiod responses during vegetative and early reproductive phases. Due to the lack of correlation between the duration of the vegetative and reproductive phases, it is possible to speculate the vegetative period may be altered independently of the modification of the rest of the phases. The positive relationship between grain number per m2 and the duration of the late reproductive phase suggests that yield could be increased by lengthening the duration of that phase. Thus, regardless of the effect on the previous phase, the photoperiod sensitivity found in the early reproductive phase opens the possibility to manipulate the relative durations of vegetative and reproductive phases. Therefore, the length of the reproductive phase will be increased at the expense of a reduction in the duration of the vegetative phase, but without changing the whole duration of the crop cycle. This strategy could increase yield in oilseed rape in the future. Variations in yield were mostly explained by changes in the grain number per unit area without significant correlation with grain weight. However, a negative relationship between grain weight and grain number was found, showing a slight counterbalance in yield, by decreasing the grain weight. Since oil concentration appeared to be a more conservative attribute, increases in crop yield through a higher grain number per unit area would be a suitable strategy for improving oil yield as no reductions in oil concentration can be expected.Oilseed rape yield potential could be improved lengthening the duration of the late reproductive phase by increasing the number of grains per unit area. Photoperiod sensitivity could be used as a tool to manipulate the reproductive phase and thereby the number of grains. The aim of this study was to assess [i] the effects of different combinations of photoperiod on the duration of different phases and [ii] analyze how the changes in that duration affect yield [and its components] as well as oil seed content in oilseed rape. Field experiments were conducted in a factorial combination of three cultivars and three photoperiod regimes: natural photoperiod [NP] which represents the control and extended photoperiod of 6h over NP [NP+6] during emergence [E]-flower buds visible [FBV] and FBV-maturity [M] arranged in a randomized complete block design with three replicates, during two years representing three environments. Results showed that oilseed rape evidenced photoperiod responses during vegetative and early reproductive phases. Due to the lack of correlation between the duration of the vegetative and reproductive phases, it is possible to speculate the vegetative period may be altered independently of the modification of the rest of the phases. The positive relationship between grain number per m2 and the duration of the late reproductive phase suggests that yield could be increased by lengthening the duration of that phase. Thus, regardless of the effect on the previous phase, the photoperiod sensitivity found in the early reproductive phase opens the possibility to manipulate the relative durations of vegetative and reproductive phases. Therefore, the length of the reproductive phase will be increased at the expense of a reduction in the duration of the vegetative phase, but without changing the whole duration of the crop cycle. This strategy could increase yield in oilseed rape in the future. Variations in yield were mostly explained by changes in the grain number per unit area without significant correlation with grain weight. However, a negative relationship between grain weight and grain number was found, showing a slight counterbalance in yield, by decreasing the grain weight. Since oil concentration appeared to be a more conservative attribute, increases in crop yield through a higher grain number per unit area would be a suitable strategy for improving oil yield as no reductions in oil concentration can be expected.GRAIN WEIGHTCROP DEVELOPMENTGRAIN WEIGHTSNUMBER OF GRAINSRAPESEEDYIELDCROPSPLANTS [BOTANY]OILSEEDSAGRICULTURAL DEVELOPMENTBIOCHEMICAL COMPOSITIONBUDCROP YIELDCULTIVARDICOTYLEDONEMERGENCEESSENTIAL OILEXPERIMENTAL STUDYMATURATIONPHOTOPERIODPHYTOCHEMISTRYWEIGHTYIELD RESPONSEBRASSICA NAPUSIndustrial Crops and Products |