Minimal descriptors for characterization and evaluation of Jatropha curcas L. germplasm for utilization in crop improvement

Sunil, N.; Kumar, Vinod; Sujatha, M.; Rao, G. R. K.; Varaprasad, K. S.

doi:10.1016/j.biombioe.2012.11.008

Cited by 28 publications

(27 citation statements)

References 4 publications

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“…Other branching patterns are possible due to the high phenotypic plasticity. Sunil et al (2013) observed several branching habits and patterns between different germplasm in a monoculture planting at 2 m 9 2 m, with no pruning, and receiving similar management treatments. Although aboveground phenotypes show a wide range of plasticity, genetic diversity is narrow (Divakara et al 2010).…”

Section: Discussionmentioning

confidence: 85%

“…Foresters consider jatropha a crop or a plantation crop at best, while agronomists consider it a tree. The disagreement occurs because jatropha has a range of phenotypes; shrub-like, multi-stemmed growth habits with height \5 m, and tree-like, single-stemmed growth habits with height [5 m (Sunil et al 2013). This problem is not restricted to jatropha as Scheffer et al (2014) found that 9.2 % of the tree species assessed were classified as shrubs in the TRY (plant traits) database.…”

Section: Introductionmentioning

confidence: 99%

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Tree or shrub: a functional branch analysis of Jatropha curcas L.

Tjeuw¹,

Mulia²,

Slingerland³

et al. 2015

Agroforest Syst

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Jatropha curcas is an oil-bearing semievergreen shrub or small tree with potential as a source of sustainable biofuel, yet information regarding vegetative and fruit biomass in relation to plant architecture is lacking. Research conducted in Indonesia used the tree based functional branch analysis (FBA) model as a non-destructive method to estimate above and belowground biomass, and plant architecture. The FBA utility for shrubs was unknown and required modification. This research used destructive measurements to validate modifications to the FBA model that included subcategorisation of the tapering coefficient for twig, branch, and wood diameter classes, and addition of a fruit load parameter in the distal link. The modified FBA model confirmed jatropha to be a shrub rather than a tree, producing variable estimates for aboveground biomass. This variation was due to morphological plasticity in the length-diameter relationship of the branches that diverged from fractal branching architecture. Fruit biomass variation between replicates was not well estimated and total proximal root diameter was a poor predictor of total root biomass, due to the proximal roots having enlarged water storage structures that do not follow fractal branching assumptions. Jatropha fruit was shown to predominate on twigs with a diameter between 0.9 and 1.4 cm. Understanding the correlation between fruit development and plant architecture will be necessary for fine-tuning the FBA model for future commercial breeding and selection. The high degree of morphological plasticity displayed by jatropha requires consideration when determining plant biomass.

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Section: Discussionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Tree or shrub: a functional branch analysis of Jatropha curcas L.

Tjeuw¹,

Mulia²,

Slingerland³

et al. 2015

Agroforest Syst

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“…Esses caracteres têm sido sugeridos como descritores para a caracterização e avaliação de genótipos de pinhão-manso (Sunil, 2013). Além desses, a produção de sementes, a altura de plantas, o diâmetro de caule, o número de ramos, o número de flores femininas por racemo floral, o diâmetro de copa também são caracteres relevantes para os programas de melhoramento da espécie.…”

Section: Introductionunclassified

Capacidade combinatória e parâmetros genéticos de genótipos de pinhão-manso quanto a caracteres morfoagronômicos

Santana

Carvalho

Blank

et al. 2013

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi determinar as capacidades geral e específica de combinação, os parâmetros genéticos e a correlação entre caracteres morfoagronômicos, em acessos de pinhão-manso (Jatropha curcas). Utilizou-se o delineamento experimental de blocos ao acaso, com três repetições. Foram avaliados os caracteres: PR, produção de sementes; AP, altura de planta; NRS, número de ramos secundários; NFF, número de flores femininas; DC, diâmetro de colo; P100, massa de 100 sementes; AR, altura de ramificação; e DCO, diâmetro de copa. A capacidade geral de combinação foi significativa para PR, NRS, DC, P100 e AR, enquanto a capacidade específica foi significativa apenas para NFF e NRS. As estimativas de herdabilidade foram superiores a 70%, em NRS, NFF, DC e AR. Observou-se correlações genotípicas positivas entre NRS e DC (0,942), NRS e AP (0,762), NRS e DCO (0,798), NRS e PR (0,759), DC e AP (0,738), DC e DCO (0,844), DC e PR (0,802), e DCO e PR (0,742); e negativas entre NRS e AR (-0,665), e DC e AR (-0,687). O NFF explicou mais de 50% da variação dos híbridos de pinhão-manso. A capacidade geral de combinação é preponderante na maioria das características avaliadas.Termos para indexação: Jatropha curcas, capacidade específica de combinação, capacidade geral de combinação, contribuição relativa, correlação genética, divergência genética. Combining ability and genetic parameters of physic nut genotypes for morphoagronomic traitsAbstract -The objective of this work was to determine the general and the specific combining abilities, the genetic parameters, and the correlation between morphoagronomic traits in physic nut (Jatropha curcas) accessions. A randomized block experimental design, with three replicates, was used. The evaluated characters were: Y, yield; PH, plant height; NSB, number of secondary branches; NFF, number of female flowers; SD, stem diameter; W100, weight of 100 seeds; HB, height of branches; and DC, diameter of crown. The general combining ability was significant for Y, NSB, SD, W100, and HB, while the specific combining ability was signicant only for NFF and NSB. Heritability estimates were higher than 70% for NSB, NFF, SD, and HB. Positive genotypic correlations were observed between NSB and SD (0.942), NSB and PH (0.762), NSB and DC (0.798), NSB and Y (0.759), SD and PH (0.738), SD and DC (0.844), SD and Y (0.802), and DC and Y (0.742); and negative ones between NSB and HB (-0.665), and SD and HB (-0.687). The NFF explained over 50% of the variation in the physic nut hybrids. General combining ability preponderates on the evaluated traits.

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“…The germplasm morphologically established in characterization and pre-evaluation according to Sunil et al (2010 and2013). The comparison of four species conducted into eleven quantitative traits, as well as to twelve qualitative attributes as shown in Tables 2 and 3.…”

Section: Morphological Attributesmentioning

confidence: 99%

Morphological, Phytochemical and Molecular Characterization on Some Jatropha Species Cultivated in Egypt

El-leel¹

2017

IJPSR

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This study was to screen the morphological, phytochemical attributes and describe the similarity and diversity in terms of RAPD and ISSR profiles of four Jatropha species (J. multifida, J. gossypifolia, J. integrrima and J. curcas). As well, investigate genetic diversity among them for using in conserving at Gene-Banks and genetic improvement. It appeared that show the variation in twenty-three quantitative and qualitative attributes among Jatropha species under Egyptian condition. The results of Pearson correlation among twelve quantitative revealed high significant positive correlations. Negative correlation observed between petiole length and other traits except seed breadth, whereas it was -0.97 when be compared with pod length. In PCA studied, it noted that leaf length, leaf width and petiole length were contributing most to the separation among species. The result showed that all secondary metabolites analyzed were present in all leaves of Jatropha species studied but at different concentrations and it obtained confirm the relatedness of these species and spotlight these important phytochemicals in the species. At molecular study, four RAPD-primers displayed a total of 66 amplified fragments, in which 50 (75.76%) were polymorphic fragments. The number of total amplified fragments scored per primer ranged from 10 (primer OP-D09) to 24 (primer OP-Z03). Thirty-six out of 66 RAPD-PCR fragments were found to be useful as cultivar specific markers. In ISSR analysis, 5 of the ISSR primers generated variable banding patterns. A total of 63 out of 90 ISSR fragments were polymorphic. 36 amplified fragments were considered as cultivar-specific markers. Results of the combination of the banding patterns of both techniques, data exhibited that the most two closely related species were multifida and gossypifolia with the highest similarity index (1.00). On the other hand, the two most distantly related species were curcas and integerrima with no similarity index (0.00). The 9 primers of RAPD and ISSR yielded 113 polymorphic markers that unambiguously discriminated 4 genotypes into three clusters. In conclusion, polymorphisms of both could be used as efficient tools for the detection of similarities and phylogenetic relationships of the studied genotypes, which could be useful in the breeding programs.

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Minimal descriptors for characterization and evaluation of Jatropha curcas L. germplasm for utilization in crop improvement

Cited by 28 publications

References 4 publications

Tree or shrub: a functional branch analysis of Jatropha curcas L.

Tree or shrub: a functional branch analysis of Jatropha curcas L.

Capacidade combinatória e parâmetros genéticos de genótipos de pinhão-manso quanto a caracteres morfoagronômicos

Morphological, Phytochemical and Molecular Characterization on Some Jatropha Species Cultivated in Egypt

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