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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
13/11/2023 |
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Data da última atualização: |
13/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, A. D.; SOUSA, M. B. e; ALVES, A. A. C.; OLIVEIRA, E. J. de. |
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Afiliação: |
ALEXANDRA DAMASCENO SANTOS, UNIVERSIDADE FEDERAL DO RECÔNCAVO DA BAHIA; MASSAINE BANDEIRA E SOUSA; ALFREDO AUGUSTO CUNHA ALVES, CNPMF; EDER JORGE DE OLIVEIRA, CNPMF. |
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Título: |
Environmental factors influence the production of flowers and fruits of cassava. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Scientia Horticulturae, v. 323, 112498, 2024. |
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Páginas: |
14 p. |
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Descrição Física: |
il. |
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Idioma: |
Inglês |
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Conteúdo: |
Cassava (Manihot esculenta Crantz) is a widely adaptable crop and plays a vital role in food security in many countries. Although farmers constantly demand improvements in crop productivity through genetic improvement, low flowering in the species can make it challenging to include some parents in crossing blocks or generate large populations. This study aimed to evaluate the influence of various environmental factors on cassava flowering by planting at different times of the year in the Recôncavo of Bahia region (Brazil). Thirty-five cassava accessions with contrasting flowering characteristics were planted in six different planting seasons, with a two-to-three-month difference between each planting date. Climate and flowering data were collected every two weeks during the experimental period, evaluating traits such as the number of days to the beginning of the first ramification (ND1B), flowering score (FS), score weighted by early flowering (SW) and height of the first branch (H1B). We found significant differences in all evaluated traits between planting seasons. The broad-sense heritability and Cullis' heritability were of medium (0.38 for FS) to high magnitude (0.98 for SW. Notably, the third planting season (February 2021), resulted in early flowering, approximately two months after planting, with SW of 10.40 and a higher flowering score of 0.56, representing a 52 % and 60 % increase compared to the first planting season, respectively. Our findings indicate that temperature and accumulated degree days are environmental factors correlated with increased flowering in cassava. Moreover, the dispersion of the genotypes in the two principal component analysis showed differences across the six planting seasons, indicating the environmental influence on the expression of flowering in this species. These findings can help breeders make reliable decisions when setting up crossing fields to accelerate the acquisition of improved progenies. MenosCassava (Manihot esculenta Crantz) is a widely adaptable crop and plays a vital role in food security in many countries. Although farmers constantly demand improvements in crop productivity through genetic improvement, low flowering in the species can make it challenging to include some parents in crossing blocks or generate large populations. This study aimed to evaluate the influence of various environmental factors on cassava flowering by planting at different times of the year in the Recôncavo of Bahia region (Brazil). Thirty-five cassava accessions with contrasting flowering characteristics were planted in six different planting seasons, with a two-to-three-month difference between each planting date. Climate and flowering data were collected every two weeks during the experimental period, evaluating traits such as the number of days to the beginning of the first ramification (ND1B), flowering score (FS), score weighted by early flowering (SW) and height of the first branch (H1B). We found significant differences in all evaluated traits between planting seasons. The broad-sense heritability and Cullis' heritability were of medium (0.38 for FS) to high magnitude (0.98 for SW. Notably, the third planting season (February 2021), resulted in early flowering, approximately two months after planting, with SW of 10.40 and a higher flowering score of 0.56, representing a 52 % and 60 % increase compared to the first planting season, respectively. Our findings indicate that tempe... Mostrar Tudo |
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Thesagro: |
Mandioca. |
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Thesaurus Nal: |
Cassava; Flowers; Fruits. |
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Categoria do assunto: |
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Marc: |
LEADER 02564naa a2200217 a 4500
001 2158289
005 2023-11-13
008 2024 bl uuuu u00u1 u #d
100 1 $aSANTOS, A. D.
245 $aEnvironmental factors influence the production of flowers and fruits of cassava.$h[electronic resource]
260 $c2024
300 $a14 p.$cil.
520 $aCassava (Manihot esculenta Crantz) is a widely adaptable crop and plays a vital role in food security in many countries. Although farmers constantly demand improvements in crop productivity through genetic improvement, low flowering in the species can make it challenging to include some parents in crossing blocks or generate large populations. This study aimed to evaluate the influence of various environmental factors on cassava flowering by planting at different times of the year in the Recôncavo of Bahia region (Brazil). Thirty-five cassava accessions with contrasting flowering characteristics were planted in six different planting seasons, with a two-to-three-month difference between each planting date. Climate and flowering data were collected every two weeks during the experimental period, evaluating traits such as the number of days to the beginning of the first ramification (ND1B), flowering score (FS), score weighted by early flowering (SW) and height of the first branch (H1B). We found significant differences in all evaluated traits between planting seasons. The broad-sense heritability and Cullis' heritability were of medium (0.38 for FS) to high magnitude (0.98 for SW. Notably, the third planting season (February 2021), resulted in early flowering, approximately two months after planting, with SW of 10.40 and a higher flowering score of 0.56, representing a 52 % and 60 % increase compared to the first planting season, respectively. Our findings indicate that temperature and accumulated degree days are environmental factors correlated with increased flowering in cassava. Moreover, the dispersion of the genotypes in the two principal component analysis showed differences across the six planting seasons, indicating the environmental influence on the expression of flowering in this species. These findings can help breeders make reliable decisions when setting up crossing fields to accelerate the acquisition of improved progenies.
650 $aCassava
650 $aFlowers
650 $aFruits
650 $aMandioca
700 1 $aSOUSA, M. B. e
700 1 $aALVES, A. A. C.
700 1 $aOLIVEIRA, E. J. de
773 $tScientia Horticulturae$gv. 323, 112498, 2024.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
13/12/2011 |
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Data da última atualização: |
13/12/2011 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
PEREIRA, S. P.; ALVES, J. D.; BARTHOLO, G. F.; GUIMARÃES, P. T. G.; LIVRAMENTO, D. E. do. |
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Afiliação: |
SÉRGIO PARREIRAS PEREIRA, IAC; JOSÉ DONIZETI ALVES, UFLA; GABRIEL FERREIRA BARTHOLO, SAPC; PAULO TÁCITO GONTIJO GUIMARÃES, EPAMIG; DÁRLAN EINSTEIN DO LIVRAMENTO, Bolsista do CBP&D-CAFÉ/EPAMIG. |
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Título: |
Consequências da redução de espaçamentos sobre teores caulinares de carboidratos de cafeeiros (Coffea arabica L.) cultivar Catuaí. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 4., 2005, Londrina. Anais... Brasília, DF: Embrapa Café, 2005. |
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Idioma: |
Português |
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Conteúdo: |
O experimento foi instalado na Fazenda Experimental da EPAMIG em Machado, sul de Minas Gerais, em 1992, com o objetivo de avaliar as conseqüências da redução de espaçamentos entre as linhas e entre as plantas na linha de plantio sobre a produção e a fenologia do cafeeiro. O delineamento experimental utilizado foi um fatorial 4 x 3 com parcela subdividida, sendo quatro distâncias entre as linhas (2,0? 2,5? 3,0 e 3,5 m) três distâncias entre as plantas na linha de plantio (0,5? 0,75? 1,0 m), e duas épocas de poda (uma precoce feita logo após a colheita no mês de julho 2002 e a outra tardia no mês de janeiro de 2003), em totalizando 24 tratamentos dispostos em blocos ao acaso em três repetições. Em julho de 2002 e em janeiro de 2003 foram realizadas as podas tipo "recepa", onde foram coletadas as amostras dos discos caulinares dos cafeeiros e analisados os teores de carboidrato acumulados no caule. De acordo com o resultado, a redução nos espaçamentos entre as linhas de plantio não influenciaram o acúmulo dos teores caulinares de carboidratos. A redução do espaçamento entre as plantas na linha de plantio refletiu em menor acumulo dos teores caulinares de carboidratos. |
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Palavras-Chave: |
Cafeeiro; Teor de carboidrato. |
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Thesagro: |
Espaçamento. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/50098/1/Consequencias-da-reducao-de-espacamentos-sobre.pdf
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Marc: |
LEADER 01906nam a2200193 a 4500
001 1909498
005 2011-12-13
008 2005 bl uuuu u00u1 u #d
100 1 $aPEREIRA, S. P.
245 $aConsequências da redução de espaçamentos sobre teores caulinares de carboidratos de cafeeiros (Coffea arabica L.) cultivar Catuaí.$h[electronic resource]
260 $aIn: SIMPÓSIO DE PESQUISA DOS CAFÉS DO BRASIL, 4., 2005, Londrina. Anais... Brasília, DF: Embrapa Café$c2005
520 $aO experimento foi instalado na Fazenda Experimental da EPAMIG em Machado, sul de Minas Gerais, em 1992, com o objetivo de avaliar as conseqüências da redução de espaçamentos entre as linhas e entre as plantas na linha de plantio sobre a produção e a fenologia do cafeeiro. O delineamento experimental utilizado foi um fatorial 4 x 3 com parcela subdividida, sendo quatro distâncias entre as linhas (2,0? 2,5? 3,0 e 3,5 m) três distâncias entre as plantas na linha de plantio (0,5? 0,75? 1,0 m), e duas épocas de poda (uma precoce feita logo após a colheita no mês de julho 2002 e a outra tardia no mês de janeiro de 2003), em totalizando 24 tratamentos dispostos em blocos ao acaso em três repetições. Em julho de 2002 e em janeiro de 2003 foram realizadas as podas tipo "recepa", onde foram coletadas as amostras dos discos caulinares dos cafeeiros e analisados os teores de carboidrato acumulados no caule. De acordo com o resultado, a redução nos espaçamentos entre as linhas de plantio não influenciaram o acúmulo dos teores caulinares de carboidratos. A redução do espaçamento entre as plantas na linha de plantio refletiu em menor acumulo dos teores caulinares de carboidratos.
650 $aEspaçamento
653 $aCafeeiro
653 $aTeor de carboidrato
700 1 $aALVES, J. D.
700 1 $aBARTHOLO, G. F.
700 1 $aGUIMARÃES, P. T. G.
700 1 $aLIVRAMENTO, D. E. do
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