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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
26/08/2015 |
Data da última atualização: |
19/02/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
AZEVEDO, G. C.; CHEAVEGATTI-GANOTTO, A.; NEGRI, B. F.; HUFNAGEL, B.; SILVA, L. da C. e; MAGALHAES, J. V.; GARCIA, A. A. F.; LANA, U. G. P.; SOUSA, S. M. de; GUIMARAES, C. T. |
Afiliação: |
JURANDIR VIEIRA DE MAGALHAES, CNPMS; UBIRACI GOMES DE PAULA LANA, CNPMS; SYLVIA MORAIS DE SOUSA TINOCO, CNPMS; CLAUDIA TEIXEIRA GUIMARAES, CNPMS. |
Título: |
Multiple interval QTL mapping and searching for PSTOL1 homologs associated with root morphology, biomass accumulation and phosphorus content in maize seedlings under low-P. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
BMC Plant Biology, v. 15, n. 172, p. 1-17, 2015. |
DOI: |
10.1186/s12870-015-0561-y |
Idioma: |
Inglês |
Conteúdo: |
Background: Modifications in root morphology are important strategies to maximize soil exploitation under phosphorus starvation in plants. Here, we used two multiple interval models to map QTLs related to root traits, biomass accumulation and Pcontent in amaize RIL population cultivated in nutrient solution. In addition, we searched for putative maize homologs to PSTOL1, a gene responsible to enhance early root growth, Puptake and grain yield in rice and sorghum. Results: Based on path analysis, root surface area was the root morphology component that most strongly contributed to total dry weight and to Pcontent in maize seedling under low-Pavailability.Multiple interval mapping modelsfor single (MIM) and multiple traits (MT-MIM) were combined and revealed 13 genomic regions significantly associated with the target traits in a complementary way. The phenotypic variances explained by all QTLs and their epistatic interactions using MT-MIM (23.4 to 35.5%) were higher than in previous studies, and presented superior statistical power.Some of theseQTLswere coincident with QTLsfor root morphology traitsand grain yield previously mapped,whereasothersharbored ZmPSTOLcandidate genes,which shared more than 55%of amino acid sequence identity and a conserved serine/threonine kinase domain with OsPSTOL1.Additionally, four ZmPSTOLcandidate genes co-localized with QTLsfor root morphology, biomassaccumulation and/or Pcontent were preferentially expressed in rootsof the parental lines that contributed the allelesenhancing the respective phenotypes. Conclusions: QTLmapping strategies adopted in this study revealed complementary results for single and multiple traitswith high accuracy. Some QTLs,mainly the ones that were also associated with yield performance in other studies, can be good targets for marker-assisted selection to improve P-use efficiency in maize. Based on the co-localization with QTLs, the protein domain conservation and the coincidence of gene expression,we selected novel maize genesasputative homologs to PSTOL1 that will require further validation studies. MenosBackground: Modifications in root morphology are important strategies to maximize soil exploitation under phosphorus starvation in plants. Here, we used two multiple interval models to map QTLs related to root traits, biomass accumulation and Pcontent in amaize RIL population cultivated in nutrient solution. In addition, we searched for putative maize homologs to PSTOL1, a gene responsible to enhance early root growth, Puptake and grain yield in rice and sorghum. Results: Based on path analysis, root surface area was the root morphology component that most strongly contributed to total dry weight and to Pcontent in maize seedling under low-Pavailability.Multiple interval mapping modelsfor single (MIM) and multiple traits (MT-MIM) were combined and revealed 13 genomic regions significantly associated with the target traits in a complementary way. The phenotypic variances explained by all QTLs and their epistatic interactions using MT-MIM (23.4 to 35.5%) were higher than in previous studies, and presented superior statistical power.Some of theseQTLswere coincident with QTLsfor root morphology traitsand grain yield previously mapped,whereasothersharbored ZmPSTOLcandidate genes,which shared more than 55%of amino acid sequence identity and a conserved serine/threonine kinase domain with OsPSTOL1.Additionally, four ZmPSTOLcandidate genes co-localized with QTLsfor root morphology, biomassaccumulation and/or Pcontent were preferentially expressed in rootsof the parental lines that c... Mostrar Tudo |
Palavras-Chave: |
Aquisição de fósforo; Proteína quinase. |
Thesagro: |
Zea mays. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03000naa a2200277 a 4500 001 2022698 005 2016-02-19 008 2015 bl uuuu u00u1 u #d 024 7 $a10.1186/s12870-015-0561-y$2DOI 100 1 $aAZEVEDO, G. C. 245 $aMultiple interval QTL mapping and searching for PSTOL1 homologs associated with root morphology, biomass accumulation and phosphorus content in maize seedlings under low-P.$h[electronic resource] 260 $c2015 520 $aBackground: Modifications in root morphology are important strategies to maximize soil exploitation under phosphorus starvation in plants. Here, we used two multiple interval models to map QTLs related to root traits, biomass accumulation and Pcontent in amaize RIL population cultivated in nutrient solution. In addition, we searched for putative maize homologs to PSTOL1, a gene responsible to enhance early root growth, Puptake and grain yield in rice and sorghum. Results: Based on path analysis, root surface area was the root morphology component that most strongly contributed to total dry weight and to Pcontent in maize seedling under low-Pavailability.Multiple interval mapping modelsfor single (MIM) and multiple traits (MT-MIM) were combined and revealed 13 genomic regions significantly associated with the target traits in a complementary way. The phenotypic variances explained by all QTLs and their epistatic interactions using MT-MIM (23.4 to 35.5%) were higher than in previous studies, and presented superior statistical power.Some of theseQTLswere coincident with QTLsfor root morphology traitsand grain yield previously mapped,whereasothersharbored ZmPSTOLcandidate genes,which shared more than 55%of amino acid sequence identity and a conserved serine/threonine kinase domain with OsPSTOL1.Additionally, four ZmPSTOLcandidate genes co-localized with QTLsfor root morphology, biomassaccumulation and/or Pcontent were preferentially expressed in rootsof the parental lines that contributed the allelesenhancing the respective phenotypes. Conclusions: QTLmapping strategies adopted in this study revealed complementary results for single and multiple traitswith high accuracy. Some QTLs,mainly the ones that were also associated with yield performance in other studies, can be good targets for marker-assisted selection to improve P-use efficiency in maize. Based on the co-localization with QTLs, the protein domain conservation and the coincidence of gene expression,we selected novel maize genesasputative homologs to PSTOL1 that will require further validation studies. 650 $aZea mays 653 $aAquisição de fósforo 653 $aProteína quinase 700 1 $aCHEAVEGATTI-GANOTTO, A. 700 1 $aNEGRI, B. F. 700 1 $aHUFNAGEL, B. 700 1 $aSILVA, L. da C. e 700 1 $aMAGALHAES, J. V. 700 1 $aGARCIA, A. A. F. 700 1 $aLANA, U. G. P. 700 1 $aSOUSA, S. M. de 700 1 $aGUIMARAES, C. T. 773 $tBMC Plant Biology$gv. 15, n. 172, p. 1-17, 2015.
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Embrapa Milho e Sorgo (CNPMS) |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
Data corrente: |
11/03/2004 |
Data da última atualização: |
31/01/2019 |
Autoria: |
GARCIA, L. C. |
Afiliação: |
LUCINDA CARNEIRO GARCIA, CPAA. |
Título: |
Aspectos morfo-anatômicos e tolerância à dessecação de sementes de Podocarpus lambertii Klotz. e Podocarpus sellowii Klotz. (Podocarpaceae). |
Ano de publicação: |
2003 |
Fonte/Imprenta: |
2003. |
Páginas: |
81 f. |
Idioma: |
Português |
Notas: |
Tese (Doutorado em Ciências Florestais) - Universidade Federal do Paraná, Curitiba. |
Conteúdo: |
Estudos relacionados ao desenvolvimento de frutos e sementes permitem a obtenção de material de boa qualidade fisiológica, imprescindível nos trabalhos silviculturais com essas espécies. O presente trabalho é uma contribuição ao estudo da ontogênese de Podocarpus lambertii Klotz. e Podocarpus sellowii Klotz., bem como, objetivou avaliar o comportamento das sementes à dessecação. |
Palavras-Chave: |
Brasil; Dessecação; Podocarpus sellowii. |
Thesagro: |
Podocarpus Lambertii; Semente; Silvicultura. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/191759/1/T-GARCIA-LUCINDA-CARNEIRO.pdf
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Marc: |
LEADER 01054nam a2200205 a 4500 001 1668366 005 2019-01-31 008 2003 bl uuuu m 00u1 u #d 100 1 $aGARCIA, L. C. 245 $aAspectos morfo-anatômicos e tolerância à dessecação de sementes de Podocarpus lambertii Klotz. e Podocarpus sellowii Klotz. (Podocarpaceae). 260 $a2003.$c2003 300 $a81 f. 500 $aTese (Doutorado em Ciências Florestais) - Universidade Federal do Paraná, Curitiba. 520 $aEstudos relacionados ao desenvolvimento de frutos e sementes permitem a obtenção de material de boa qualidade fisiológica, imprescindível nos trabalhos silviculturais com essas espécies. O presente trabalho é uma contribuição ao estudo da ontogênese de Podocarpus lambertii Klotz. e Podocarpus sellowii Klotz., bem como, objetivou avaliar o comportamento das sementes à dessecação. 650 $aPodocarpus Lambertii 650 $aSemente 650 $aSilvicultura 653 $aBrasil 653 $aDessecação 653 $aPodocarpus sellowii
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