Parâmetros genéticos de frutos, sementes e plântulas de Jatropha ribifolia (Pohl) Baill. (Euphorbiaceae)

Lyra, Danilo Hottis; Almeida, Lucas Aragao Hora; Brasileiro, Bruno Portela; Santana, Mairson Robson; Amaral, Cláudio Lúcio Fernandes

doi:10.1590/s1516-05722012000400002

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…Cruz & Carneiro (2014). O coeficiente de variação genética (CVg) variou de 4,0 a 50,95% no ambiente de 25 ºC (Tabela 2) e de 3,57 a 47,70% no ambiente de 28 ºC (Tabela 3), valores superiores aos obtidos em estudos com Plukenetia volubilis (Oliveira et al, 2013) e Jatropha ribifolia (Lyra et al, 2012). As estimativas do CVg são de suma importância por expressar a quantidade de variação existente entre os genótipos.…”

Section: Resultsunclassified

“…O maior coeficiente de variação foi obtido para o caráter índice de velocidade de germinação nas avaliações em ambos os ambientes. Em estudos com plântulas de Jatropha ribifolia, Lyra et al (2012) encontraram valores de coeficientes de variação de 85,9% para IVG, o que indica que este caráter pode não ser muito preciso. De modo geral, para todos os caracteres, o coeficiente de variação estimado está de acordo com os obtidos para a espécie (Abensur et al, 2007), evidenciando satisfatória precisão experimental.…”

Section: Resultsunclassified

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Estimativa de parâmetros genéticos em sementes de caroba

Júnior

Lopes

Valente

et al. 2016

RCA

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Section: Resultsunclassified

Estimativa de parâmetros genéticos em sementes de caroba

Júnior

Lopes

Valente

et al. 2016

RCA

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“…To estimate the genetic distance between accessions, analysis of variance was performed in a completely randomized design, where accessions were considered the source of variation and each fruit one replication (Lyra et al 2012). The means of all accessions were grouped by the method of Scott-Knott at 5% probability and the dissimilarity matrix obtained by calculating the generalized distance of Mahalanobis.…”

Section: Palavras-chavementioning

confidence: 99%

“…Degrees ACTA AMAZONICA Significant differences using this clustering method were observed in studies grouping means of sacha inchi matrices and in species of the Euphorbiaceae family (Lyra et al 2012, Valente et al 2017.…”

Section: Source Of Variationmentioning

confidence: 99%

Genetic diversity among accessions of sacha inchi (Plukenetia volubilis) by phenotypic characteristics analysis

et al. 2018

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Sacha inchi (Plukenetia volubilis) is native to the Amazon region and has a high seed content of mono and polyunsaturated fatty acids, making it interesting for the pharmaceutical and cosmetic industry. The purpose of this study was to analyze sacha inchi genetic diversity and describe accessions based on phenotypic characteristics. Fruits and seeds of 25 accessions from the sacha inchi genebank of Embrapa Amazônia Ocidental in Manaus, Amazonas state, were sampled and biometrically measured. The data were subjected to analysis of variance, Mahalanobis distance, canonical correlation, and genetic diversity among and within accessions by analysis of molecular variance (AMOVA). There were significant differences among the means of the analyzed traits, but no significant canonical correlation for the groups of traits. According to AMOVA, approximately 60% of the observed variation was within accessions. The results showed variability among accessions, and that the variation within accessions should be explored to obtain best results in breeding programs.

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“…In the evaluation of Oenocarpus mapora and O. distichus progenies, wide variability was observed for emergence percentage and mean emergence time, favoring selection for these traits (SILVA; MOTA; FARIAS NETO, 2009). A study on germination of Jatropha ribifolia also reported significant genetic variability for the selection of superior plants (LYRA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Estimation of genetic parameters of Plukenetia volubilis L. seed germination

Oliveira¹,

Lopes²,

Chaves³

et al. 2013

RCA

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Plukenetia volubilis L. is a species that needs improvement to make commercial exploitation feasible, especially with regard to the seed quality. For this purpose, populations with rapid and uniform germination, followed by prompt seedling emergence are highly desirable for seedling production. The objectives were to study and estimate genetic parameters in germination and emergence tests of P. volubilis seedlings and describe the type of seed germination. Two experiments were carried out in the nursery in two seasons: in the Amazonian winter (December 2011 -January 2012) and summer (July-August 2012), evaluating 25 progenies per experiment, in a completely randomized design. The studied traits were: seedling emergence from seedling emergence from substrate (E), first emergence count (IE), emergence speed index (ESI), stem diameter (StD), hypocotyl length (HL) and shoot length (SL). Individual and combined variance analysis and the Scott Knott test were performed and genetic parameters estimated. The seedlings emerged between 19-41 days and 25-42 days in the Amazonian winter and summer, respectively. Estimates of broadsense heritability in the analysis ranged from 9.980 (E) to 26.880 (IE). The germination of P. volubilis is classified as phanerocotylar-epigeal. Significant genetic variability for the traits E, GSI, SL, StD and HL was stated in the mother plants, indicating the possibility of selecting progenies with better seed and seedling quality. RESUMO: Plukenetia volubilis L. é uma espécie que necessita de seleção para a viabilização de sua exploração comercial, principalmente quanto à qualidade das sementes, pois populações com germinação rápida e uniforme, seguida por pronta emergência das plântulas, apresentam características altamente desejáveis na formação de mudas. O objetivo deste trabalho foi estimar parâmetros genéticos em estudos de germinação e emergência de plântulas de P. volubilis, além de descrever o tipo de germinação de suas sementes. Para tanto, foram realizados dois experimentos, em viveiro, em duas épocas: inverno (dezembro de 2011 a janeiro de 2012) e verão amazônico (julho a agosto de 2012), sendo avaliadas 25 progênies em cada ensaio, no delineamento inteiramente casualizado. As características avaliadas foram: emergência de plântulas em substrato (E); primeira contagem de emergência (PC); índice de velocidade de emergência (IVE); diâmetro do coleto (DC), e comprimento do hipocótilo (H) e da parte aérea de plântulas (CP). Foram realizadas análises de variância individual e conjunta, além de teste de Scott Knot e estimativa dos parâmetros genéticos. A emergência das plântulas ocorreu entre 19 e 41 dias, e 25 e 42 dias, respectivamente, nas épocas de inverno e verão amazônico. Os valores de herdabilidade no sentido amplo na análise conjunta oscilaram de 9,980 (E) a 26,880 (PC). A germinação de P. volubilis é classificada como do tipo epígea fanerocotiledonar e as plantas matrizes apresentam variabilidade genética significativa para os caracteres E, IVE, CP, DC e H, indicando a possibilid...

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Parâmetros genéticos de frutos, sementes e plântulas de Jatropha ribifolia (Pohl) Baill. (Euphorbiaceae)

Cited by 3 publications

References 16 publications

Estimativa de parâmetros genéticos em sementes de caroba

Estimativa de parâmetros genéticos em sementes de caroba

Genetic diversity among accessions of sacha inchi (Plukenetia volubilis) by phenotypic characteristics analysis

Estimation of genetic parameters of Plukenetia volubilis L. seed germination

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