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Registro Completo |
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
Data corrente: |
02/12/2021 |
Data da última atualização: |
02/12/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SOUSA, M. B. e; ANDRADE, L. R. B. de; SOUZA, E. H. de; ALVES, A. A. C.; OLIVEIRA, E. J. de. |
Afiliação: |
MASSAINE BANDEIRA E SOUSA; LUCIANO ROGERIO BRAATZ DE ANDRADE; EVERTON HILO DE SOUZA, UFRB; ALFREDO AUGUSTO CUNHA ALVES, CNPMF; EDER JORGE DE OLIVEIRA, CNPMF. |
Título: |
Reproductive barriers in cassava: factors and implications for genetic improvement. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Plos One, November, 2021. |
Idioma: |
Inglês |
Conteúdo: |
Cassava breeding is hampered by high flower abortion rates that prevent efficient recombination among promising clones. To better understand the factors causing flower abortion and propose strategies to overcome them, we 1) analyzed the reproductive barriers to intraspecific crossing, 2) evaluated pollen-pistil interactions to maximize hand pollination efficiency, and 3) identified the population structure of elite parental clones. From 2016 to 2018, the abortion and fertilization rates of 5,748 hand crossings involving 91 parents and 157 progenies were estimated. We used 16,300 single nucleotide polymorphism markers to study the parents' population structure via discriminant analysis of principal components, and three clusters were identified. To test for male and female effects, we used a mixed model in which the environment (month and year) was fixed, while female and male (nested to female) were random effects. Regardless of the population structure, significant parental effects were identified for abortion and fertilization rates, suggesting the existence of reproductive barriers among certain cassava clones. Matching ability between cassava parents was significant for pollen grains that adhered to the stigma surface, germinated pollen grains, and the number of fertilized ovules. Non-additive genetic effects were important to the inheritance of these traits. Pollen viability and pollen-pistil interactions in cross- and self-pollination were also investigated to characterize pollen-stigma compatibility. Various events related to pollen tube growth dynamics indicated fertilization abnormalities. These abnormalities included the reticulated deposition of callose in the pollen tube, pollen tube growth cessation in a specific region of the stylet, and low pollen grain germination rate. Generally, pollen viability and stigma receptivity varied depending on the clone and flowering stage and were lost during flowering. This study provides novel insights into cassava reproduction that can assist in practical crossing and maximize the recombination of contrasting clones. MenosCassava breeding is hampered by high flower abortion rates that prevent efficient recombination among promising clones. To better understand the factors causing flower abortion and propose strategies to overcome them, we 1) analyzed the reproductive barriers to intraspecific crossing, 2) evaluated pollen-pistil interactions to maximize hand pollination efficiency, and 3) identified the population structure of elite parental clones. From 2016 to 2018, the abortion and fertilization rates of 5,748 hand crossings involving 91 parents and 157 progenies were estimated. We used 16,300 single nucleotide polymorphism markers to study the parents' population structure via discriminant analysis of principal components, and three clusters were identified. To test for male and female effects, we used a mixed model in which the environment (month and year) was fixed, while female and male (nested to female) were random effects. Regardless of the population structure, significant parental effects were identified for abortion and fertilization rates, suggesting the existence of reproductive barriers among certain cassava clones. Matching ability between cassava parents was significant for pollen grains that adhered to the stigma surface, germinated pollen grains, and the number of fertilized ovules. Non-additive genetic effects were important to the inheritance of these traits. Pollen viability and pollen-pistil interactions in cross- and self-pollination were also investigated to characte... Mostrar Tudo |
Thesagro: |
Mandioca. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/228421/1/Souza-et-al-PlosOne-2021-1.pdf
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Marc: |
LEADER 02619naa a2200181 a 4500 001 2137018 005 2021-12-02 008 2021 bl uuuu u00u1 u #d 100 1 $aSOUSA, M. B. e 245 $aReproductive barriers in cassava$bfactors and implications for genetic improvement.$h[electronic resource] 260 $c2021 520 $aCassava breeding is hampered by high flower abortion rates that prevent efficient recombination among promising clones. To better understand the factors causing flower abortion and propose strategies to overcome them, we 1) analyzed the reproductive barriers to intraspecific crossing, 2) evaluated pollen-pistil interactions to maximize hand pollination efficiency, and 3) identified the population structure of elite parental clones. From 2016 to 2018, the abortion and fertilization rates of 5,748 hand crossings involving 91 parents and 157 progenies were estimated. We used 16,300 single nucleotide polymorphism markers to study the parents' population structure via discriminant analysis of principal components, and three clusters were identified. To test for male and female effects, we used a mixed model in which the environment (month and year) was fixed, while female and male (nested to female) were random effects. Regardless of the population structure, significant parental effects were identified for abortion and fertilization rates, suggesting the existence of reproductive barriers among certain cassava clones. Matching ability between cassava parents was significant for pollen grains that adhered to the stigma surface, germinated pollen grains, and the number of fertilized ovules. Non-additive genetic effects were important to the inheritance of these traits. Pollen viability and pollen-pistil interactions in cross- and self-pollination were also investigated to characterize pollen-stigma compatibility. Various events related to pollen tube growth dynamics indicated fertilization abnormalities. These abnormalities included the reticulated deposition of callose in the pollen tube, pollen tube growth cessation in a specific region of the stylet, and low pollen grain germination rate. Generally, pollen viability and stigma receptivity varied depending on the clone and flowering stage and were lost during flowering. This study provides novel insights into cassava reproduction that can assist in practical crossing and maximize the recombination of contrasting clones. 650 $aMandioca 700 1 $aANDRADE, L. R. B. de 700 1 $aSOUZA, E. H. de 700 1 $aALVES, A. A. C. 700 1 $aOLIVEIRA, E. J. de 773 $tPlos One, November, 2021.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
20/11/2023 |
Data da última atualização: |
20/11/2023 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
DUARTE, L. S.; SILVA, L. C.; LINS, P. M. P.; BOARI, A. de J.; NORONHA, A. C. da S. |
Afiliação: |
LEONARDO SOUZA DUARTE, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; LEANDRO CARVALHO SILVA, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; PAULO MANOEL PONTES LINS, SOCOCO; ALESSANDRA DE JESUS BOARI, CPATU; ALOYSEIA CRISTINA DA SILVA NORONHA, CPATU. |
Título: |
Monitoramento de insetos em plantio comercial de Cocos nucifera L. no município de Santa Izabel do Pará. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 25., 2022, Belém, PA. Anais... Belém, PA: Embrapa Amazônia Oriental, 2023. |
Páginas: |
p. 16-17. |
Série: |
(Embrapa Amazônia Oriental. Eventos técnicos & científicos, 1). |
Idioma: |
Português |
Palavras-Chave: |
ACC; Artrópodes; Atrofia da coroa do coqueiro. |
Thesagro: |
Cocos Nucifera. |
Thesaurus NAL: |
Arecaceae. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1158562/1/Pibic2022-17-18.pdf
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Marc: |
LEADER 00852nam a2200229 a 4500 001 2158562 005 2023-11-20 008 2023 bl uuuu u00u1 u #d 100 1 $aDUARTE, L. S. 245 $aMonitoramento de insetos em plantio comercial de Cocos nucifera L. no município de Santa Izabel do Pará.$h[electronic resource] 260 $aIn: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 25., 2022, Belém, PA. Anais... Belém, PA: Embrapa Amazônia Oriental$c2023 300 $ap. 16-17. 490 $a(Embrapa Amazônia Oriental. Eventos técnicos & científicos, 1). 650 $aArecaceae 650 $aCocos Nucifera 653 $aACC 653 $aArtrópodes 653 $aAtrofia da coroa do coqueiro 700 1 $aSILVA, L. C. 700 1 $aLINS, P. M. P. 700 1 $aBOARI, A. de J. 700 1 $aNORONHA, A. C. da S.
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Embrapa Amazônia Oriental (CPATU) |
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