Jatropha curcas L. (Euphorbiaceae) exhibits a mixed mating system, high correlated mating and apomixis

Bressan, Eduardo A.; Sebbenn, Alexandre Magno; Ferreira, Renato Rodrigues; Lee, Tseng Sheng Gerald; Figueira, Antônio

doi:10.1007/s11295-013-0623-y

Cited by 33 publications

(32 citation statements)

References 35 publications

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“…The high level of within population variation is frequently observed in allogamous species (Maghuly et al, 2015). In accordance with our results, Bressan et al (2013) found 68.3% outcrossing in jatropha species using SSR markers confirming that this species is allogamous. In addition, the dominance and efficiency of cross-fertilization in jatropha was reported by Raju and Ezradanam (2002) and Kaur et al (2011), further supporting our own findings.…”

Section: Discussionsupporting

confidence: 91%

“…Thus, there was a decrease in the genetic variability of the new populations in relation to the original population. Bressan et al (2013) also showed that a small number of individuals in the same location can result in a high rate of correlated mating, when the open-pollinated seeds were mainly full-sibs, as observed in this case. Achten et al (2010) also suggested that the complex history of introduction and domestication in other continents contributed to the low level of genetic variability observed in this species.…”

Section: Discussionsupporting

confidence: 68%

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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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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 68%

Population structure of jatropha and its implication for the breeding program

Santos¹,

Ferreira²,

Pasqual³

et al. 2016

Genet. Mol. Res.

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“…O pinhão-manso apresenta um sistema misto de reprodução, combinando autofecundações, apomixia, de forma assexuada e sem troca de pólen. Desta forma, esse sistema de reprodução resulta em sementes idênticas à planta mãe, bem como o cruzamento de indivíduos aparentados, explicando a pequena diversidade genética da planta (BRESSAN et al, 2013).…”

Section: Caracterização Do Pinhão-mansounclassified

“…A maturação desuniforme dos frutos, a baixa produtividade de óleo e as baixas produções observadas em diferentes condições edafoclimáticas brasileiras, têm limitado a viabilidade econômica no cultivo do pinhão-manso (ROCHA et al, 2012). A baixa diversidade genética das plantas de pinhão-manso dificulta a seleção de sementes e explica em parte a dificuldade no cultivo da espécie (BRESSAN et al, 2013). Além disso, a falta de informações agronômicas impede o estabelecimento do cultivo de grandes áreas com pinhão-manso.…”

Section: Caracterização Do Pinhão-mansounclassified

Avaliações bioquímicas e fisiológicas para previsão de desordens nutricionais de macronutrientes no desenvolvimento inicial do pinhão-manso

Santos¹

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“…Jatropha's narrow genetic diversity is likely due to propagation by cuttings (Achten et al, 2010e;Sanou et al, 2015), by selfing (Divakara et al, 2010;Negussie et al, 2014) and apomixis (Chang-Wei et al, 2007;Achten et al, 2010e;Bressan et al, 2013;Sanou et al, 2015).…”

Section: Plasticitymentioning

confidence: 99%

Is there life after hype for Jatropha? Exploring growth and yield in Indonesia

Tjeuw

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at 11 a.m. in the Aula. AbstractJatropha curcas L. is a biofuel crop that has not lived up to expectations due to a combination of hype and disappointment and biophysical factors. This PhD thesis is based on the plant production component of the JARAK programme which aimed to bridge the gap between truth and fiction. This study reviewed the jatropha hype and disappointment and further investigated the hypothesis that jatropha growth and yield are limited by biophysical factors of plant characteristics, cropping systems, and management. My review of the hype and disappointment shows that despite the high expectations fuelled by market pull and technology push, and numerous actors, the commercial potential for jatropha is limited by policy and governance, economics, social, technology, logistical, and environmental. A study of the biophysical components confirms that no current varieties suited to different cropping systems and locations are available. Jatropha aboveground biomass is partitioned predominantly into a structure of stem, branches, and twigs. The below to aboveground biomass ratio was 0.5 and fruit which was found only on productive twigs accounted for the smallest portion of biomass measured. Seed yields were disappointingly small (109 kg ha -1 ) and were largest in monoculture, followed by intercropping and hedgerows in that order, although yields were influenced by age and management of pruning and fertiliser. Seed yield across the three cropping systems can be predicted using plant height and the number of productive twig/branch, although the number of inflorescence clusters per productive twig may be important. Intercropping between jatropha and maize (Zea mays L.) resulted in competition for resources both belowground and aboveground that reduced maize yields. Shoot pruning was effective in managing aboveground competition, while root pruning and root barriers effectively managed competition belowground. Leaf prunings provided a limited, but positive fertility effect on maize yield comparable to 21 kg N ha -1. Jatropha -maize intercropping has potential for long-term productivity provided management practices such as fertiliser, pruning, and planting density can be developed to minimise competition and enhance complementarity. Based on my review of the jatropha hype and disappointment and my biophysical research results, the planting of jatropha by smallholders, or as a plantation crop cannot be recommended. Once the issues I highlight have been resolved and market confidence restored, jatropha may finally become a commercial source of biodiesel able to provide improved socio-economic and environmental benefits.

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Jatropha curcas L. (Euphorbiaceae) exhibits a mixed mating system, high correlated mating and apomixis

Cited by 33 publications

References 35 publications

Population structure of jatropha and its implication for the breeding program

Population structure of jatropha and its implication for the breeding program

Avaliações bioquímicas e fisiológicas para previsão de desordens nutricionais de macronutrientes no desenvolvimento inicial do pinhão-manso

Is there life after hype for Jatropha? Exploring growth and yield in Indonesia

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