Induction of Earlier Flowering in Cassava through Extended Photoperiod
Erect plant architecture is preferred by farmers but results in late and scarce flowering, which slows down breeding considerably. Inducing earlier and abundant flowering in crossing nurseries (involving erect genotypes) is a key objective for cassava and was the subject of this study. Five genotype...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-08-01
|
| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/10/9/1273 |
| _version_ | 1827707394705063936 |
|---|---|
| author | Marcela Pineda Nelson Morante Sandra Salazar Juan Cuásquer Peter T. Hyde Tim L. Setter Hernán Ceballos |
| author_facet | Marcela Pineda Nelson Morante Sandra Salazar Juan Cuásquer Peter T. Hyde Tim L. Setter Hernán Ceballos |
| author_sort | Marcela Pineda |
| collection | DOAJ |
| description | Erect plant architecture is preferred by farmers but results in late and scarce flowering, which slows down breeding considerably. Inducing earlier and abundant flowering in crossing nurseries (involving erect genotypes) is a key objective for cassava and was the subject of this study. Five genotypes with contrasting flowering behavior were grown under dark night (DN) and extended photoperiod (EP) conditions for three seasons. EP was achieved with different red light emitting diodes (LEDs) with 625–635 nm wavelength all night long or through night-breaks. EP reduced height and number of days to first branching, particularly in non- or late-flowering genotypes. A minimum of 0.02 μmol m<sup>−2</sup> s<sup>−1</sup> was required to elicit earlier flowering in plants illuminated all night. Early results using five genotypes were validated across 116 genotypes planted in a crossing nursery. EP promoted earlier flowering in erect-plant genotypes but reduced the number of branching events in early flowering genotypes to some extent. 50W LED lamps, fixed at 3 m above ground in a 4.5 m grid, proved to be a practical approach to extend photoperiod in breeding nurseries. Night breaks also proved effective, thus opening the possibility of using solar panels where electricity is not available. |
| first_indexed | 2024-03-10T16:45:05Z |
| format | Article |
| id | doaj.art-9e8cba7004a143ecb9a775c2d8e93e08 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T16:45:05Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-9e8cba7004a143ecb9a775c2d8e93e082023-11-20T11:40:53ZengMDPI AGAgronomy2073-43952020-08-01109127310.3390/agronomy10091273Induction of Earlier Flowering in Cassava through Extended PhotoperiodMarcela Pineda0Nelson Morante1Sandra Salazar2Juan Cuásquer3Peter T. Hyde4Tim L. Setter5Hernán Ceballos6The Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), Apartado Aéreo 6713, Cali 763537, ColombiaThe Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), Apartado Aéreo 6713, Cali 763537, ColombiaThe Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), Apartado Aéreo 6713, Cali 763537, ColombiaThe Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), Apartado Aéreo 6713, Cali 763537, ColombiaSection of Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, NY 14850, USASection of Soil and Crop Sciences, School of Integrative Plant Science, Cornell University, Ithaca, NY 14850, USAThe Alliance of Bioversity International and the International Center for Tropical Agriculture (CIAT), Apartado Aéreo 6713, Cali 763537, ColombiaErect plant architecture is preferred by farmers but results in late and scarce flowering, which slows down breeding considerably. Inducing earlier and abundant flowering in crossing nurseries (involving erect genotypes) is a key objective for cassava and was the subject of this study. Five genotypes with contrasting flowering behavior were grown under dark night (DN) and extended photoperiod (EP) conditions for three seasons. EP was achieved with different red light emitting diodes (LEDs) with 625–635 nm wavelength all night long or through night-breaks. EP reduced height and number of days to first branching, particularly in non- or late-flowering genotypes. A minimum of 0.02 μmol m<sup>−2</sup> s<sup>−1</sup> was required to elicit earlier flowering in plants illuminated all night. Early results using five genotypes were validated across 116 genotypes planted in a crossing nursery. EP promoted earlier flowering in erect-plant genotypes but reduced the number of branching events in early flowering genotypes to some extent. 50W LED lamps, fixed at 3 m above ground in a 4.5 m grid, proved to be a practical approach to extend photoperiod in breeding nurseries. Night breaks also proved effective, thus opening the possibility of using solar panels where electricity is not available.https://www.mdpi.com/2073-4395/10/9/1273genetic gainsgenetic recombinationgenomic selectioninbreedingplant architecturespeed breeding |
| spellingShingle | Marcela Pineda Nelson Morante Sandra Salazar Juan Cuásquer Peter T. Hyde Tim L. Setter Hernán Ceballos Induction of Earlier Flowering in Cassava through Extended Photoperiod Agronomy genetic gains genetic recombination genomic selection inbreeding plant architecture speed breeding |
| title | Induction of Earlier Flowering in Cassava through Extended Photoperiod |
| title_full | Induction of Earlier Flowering in Cassava through Extended Photoperiod |
| title_fullStr | Induction of Earlier Flowering in Cassava through Extended Photoperiod |
| title_full_unstemmed | Induction of Earlier Flowering in Cassava through Extended Photoperiod |
| title_short | Induction of Earlier Flowering in Cassava through Extended Photoperiod |
| title_sort | induction of earlier flowering in cassava through extended photoperiod |
| topic | genetic gains genetic recombination genomic selection inbreeding plant architecture speed breeding |
| url | https://www.mdpi.com/2073-4395/10/9/1273 |
| work_keys_str_mv | AT marcelapineda inductionofearlierfloweringincassavathroughextendedphotoperiod AT nelsonmorante inductionofearlierfloweringincassavathroughextendedphotoperiod AT sandrasalazar inductionofearlierfloweringincassavathroughextendedphotoperiod AT juancuasquer inductionofearlierfloweringincassavathroughextendedphotoperiod AT peterthyde inductionofearlierfloweringincassavathroughextendedphotoperiod AT timlsetter inductionofearlierfloweringincassavathroughextendedphotoperiod AT hernanceballos inductionofearlierfloweringincassavathroughextendedphotoperiod |