Processos evolutivos e a origem das plantas cultivadas

Veasey, Elizabeth Ann; Piotto, Fernando Ângelo; Nascimento, Wellington Ferreira do; Rodrigues, Jucelene Fernandes; Mezette, Thiago Fonseca; Borges, Aline; Biguzzi, Felipe A; Santos, Fernanda Raquel Camilo dos; Sobierajski, Graciela da Rocha; Recchia, Gustavo Henrique; Mistro, Júlio César

doi:10.1590/s0103-84782011000700018

Cited by 14 publications

(13 citation statements)

References 57 publications

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“…The low genetic variability in jatropha may be the result of its evolution process, as this species may have undergone a process of genetic drift over time, due to the founder effect (Heller 1996) and bottleneck effect (Veasey et al 2011). Another possible reason for the low genetic variability in jatropha might be related to the vegetative propagation method used by the commercial farmers worldwide, which tends to maintain the genetic fidelity of individuals (Ovando-Medina et al 2011).…”

Section: Genetic Diversity Of Jatropha Acessions In Northern Minas Gementioning

confidence: 99%

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Santos

Ferreira

Setotaw

et al. 2016

An. Acad. Bras. Ciênc.

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Jatropha is a potential oilseed crop, which requires mitigating factors such as the low genetic variability of the species. The solution runs through the research of Brazilian germplasm. Attention should be given to the germplasm of jatropha the north of Minas Gerais, because this is the oldest national collection and because this region may be a regions of jatropha diversity due to selection pressure arising from environmental adversities. Therefore, the objective of this study was to investigate the genetic diversity of 48 accessions of collection from Empresa de Pesquisa Agropecuária de Minas Gerais (EPAMIG), using SSR and ISSR markers. The results showed low genetic diversity, but some individuals stood out as J. mollissima (48), J. podagrica (47), Mexican accessions (42, 43, 44 and 45) and some national accessions (28, 29, 41 and 46). Therefore, aiming to increase the genetic variability and improve the effectiveness of jatropha breeding programs, it is suggested to explore such as parental accessions to generate commercial hybrids. This fact implies the possibility to support future production of jatropha, since this culture may be an important source of income, especially for small farmers living in semiarid regions of Brazil.

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Section: Genetic Diversity Of Jatropha Acessions In Northern Minas Gementioning

confidence: 99%

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Santos

Ferreira

Setotaw

et al. 2016

An. Acad. Bras. Ciênc.

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“…Jatropha suffered a founder effect during its dissemination to Asia and Africa by Portuguese navigators 400 years ago, due to the small sample size that was not representative of the original, natural population (Heller, 1996). The effect of a bottleneck occurs when the size of a population is drastically reduced due to the selection process (agronomic or not) driven by man (Veasey et al, 2011). The existence of human actions that reduced the population of jatropha is backed by Ambrosi et al (2010), who claimed that jatropha was initially not selected for characteristics of productivity and/or quality.…”

Section: Discussionmentioning

confidence: 99%

Population structure of jatropha and its implication for the breeding program

Santos¹,

Ferreira²,

Pasqual³

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Jatropha (Jatropha curcas L.) has potential as an oilseed crop that requires the development of technology for its exploitation. The objective of this study was to assess the population structure and the genetic diversity in jatropha accessions at a global level using simple sequence repeat (SSR) molecular markers. Jatropha accessions (N = 109) from 10 countries were genotyped using 10 SSR markers. The results showed a low level of genetic diversity among 92 accessions originating from India,

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“…Even so, the usual crossing schemes and selection of genotypes need to be increasingly improved in order to make them more direct and less random in the process of obtaining individuals with suitable characteristics (VEASEY et al, 2011). The adoption of any agricultural technology involves costs and benefits both for farmers and for consumers.…”

Section: Discussionmentioning

confidence: 99%

Mutagenicity, antioxidant activity and nutritional content of long-life tomato

Silva¹,

Figueiredo²,

Gomes³

et al. 2016

Biosci. J.

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ABSTRACT:The increasing tomato demand for the food market motivates improvements and the use of new biotechnologies in this fruit's production. The hybrid crop stands out for fruit production resistant to rot and postharvest wilt (long-life crops). Within this context, consumption of genetically modified food deserves attention regarding the safety and nutritional aspects due to the fact that inclusion and/or overexpression of genetic traits can cause harm to human health in the short or long term. In this scenario, this study aimed to evaluate genotoxicity and mutagenicity from different varieties of long-life tomatoes obtained by genetic breeding and also determines main bioactive compounds and antioxidant activity. The genotoxicity and mutagenicity were analyzed via the micronucleus test and the evaluation of chromosome aberrations in mice bone marrow respectively. We have also analyzed carotene, beta-carotene, lycopene, total phenol and flavonoid contents via spectrophotometry and antioxidant activity via DPPH radical scavenging assay. Considering the results obtained, it is possible to conclude that despite the absence of significant genotoxic activity among the evaluated samples, the antioxidant activity and the differences found in composition seems to be ruled by genetic factors, possibly due to the genetic breeding.

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Processos evolutivos e a origem das plantas cultivadas

Abstract: RESUMO

Cited by 14 publications

References 57 publications

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Genetic structure from the oldest Jatropha germplasm bank of Brazil and contribution for the genetic improvement

Population structure of jatropha and its implication for the breeding program

Mutagenicity, antioxidant activity and nutritional content of long-life tomato

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