Phenotypic characterization of physic nut populations

Oliveira, João Paulo de Morais; Silva, Jessica Ferreira; Oliveira, Bruna Santos de; Santos, Priscilla Gomes de Freitas; Silveira, Patrícia Souza da; Matos, Fábio Santos

doi:10.5897/ajar2016.11647

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Thus, the higher the number of branches the higher the number of inflorescences and, consequently, the higher the number of fruits. According to Oliveira et al (2016), the reproductive structures of J. curcas are at the apical end of the branches, and the number of fruits of the plant is directly connected to the number of branches, however, not all branches have inflorescences. Therefore, despite the positive correlation between number of branches and fruit production, it is common that some branches produce no fruit.…”

Section: Resultsmentioning

confidence: 99%

“…Samples were taken from the adaxial and abaxial surfaces of middle third of previously dehydrated fully developed leaves, following recommendations of Oliveira et al (2016) for stomatal count, which was performed using an optical microscope equipped with a light chamber. The stomatal density was defined as the number of stomata in 1 mm² of both leaf surfaces.…”

Section: Methodsmentioning

confidence: 99%

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Development and Productivity of Jatropha curcas Plants Treated With Growth Regulators

Amorim¹,

Amaro²,

Rossato³

et al. 2019

JAS

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The objective of the present work was to evaluate the effect of plant growth regulators (PGR) on the vegetative development and productivity of Jatropha curcas plants. A field experiment was conducted at the Goiás State University, Brazil, using two-year-old J. curcas plants planted with spacing of 3 × 2 m, using foliar applications of two PGR—trinexapac-ethyl and prohexadione-Ca. A randomized block design was used with four treatments (trinexapac-ethyl at 1 ml plant-1—T1; prohexadione-Ca at 2 mg plant-1—T2; trinexapac-ethyl at 1 ml plant-1 plus prohexadione-Ca at 2 mg plant-1—T3; and Control—T4), five replications, and plots consisting of two plants. Two applications of a 300 ml plant-1 solution with the treatments were performed with a 30-day interval after the leaf emergence period (late September and October 2017). The trinexapac-ethyl and prohexadione-Ca plant growth regulators increased the grain yield of Jatropha curcas plants by increasing their vegetative growth, and number of inflorescences, and female and hermaphrodite flowers, but had no effect on the uniformity of fruit maturation. The treatment in which both plant growth regulators were used presented the best results, generating more vigorous and productive plants.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Development and Productivity of Jatropha curcas Plants Treated With Growth Regulators

Amorim¹,

Amaro²,

Rossato³

et al. 2019

JAS

View full text Add to dashboard Cite

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Growth of Jatropha curcas plants submitted to water deficit and increasing nitrogen doses

Santos¹,

Nascente²,

Felício³

et al. 2018

Aust J Crop Sci

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The objective of the present study was to assess the severity of water deficit in Jatropha curcas plants under different nitrogen doses. The experiment was set up in a randomized complete block design with a 5 x 2 factorial [five doses of urea with 45% nitrogen (0; 300; 600; 900; 1200 mg per pot)] and two water supply levels, irrigated and water deficit, and four replications. The Jatropha curcas seeds were sown in 5 L pots with substrate consisting of oxisol, sand and manure at the ratio 3: 1: 0.5, respectively. The nitrogen was added as organic matter in the soil may have contributed to absence of interaction between the factors water deficit and nitrogen dose because it already supplied the minimum nitrogen for the plant metabolism. The nitrogen doses studied did not interfere in the water deficit severity in Jatropha curcas plants, but the plants presented tolerance to water deficit and used delayed dehydration as tolerance strategy. Jatropha curcas plant production in substrate containing red-yellow latossol, sand and manure at the ratio 3:1:0.5, respectively, and organic matter content similar or equal to 1.9% did not require nitrogen fertilization.

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Phenotypic diversity in physic nut (Jatropha curcas L.) in vivo germplasm bank for superior parent selection

Moraes¹,

Silva²,

CorrÃaa³

et al. 2017

Afr. J. Biotechnol.

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Jatropha curcas is an interesting alternative for biodiesel production due to the high oil content in its seeds, its ability to grow in a wide range of climate and soil conditions as well as low cost of production. However, the species is considered to be in domestication and there are no defined cultivars. Therefore, it is extremely important to understand the genetic diversity of the species for selection and characterization of promising genotypes to initiate breeding programs. The objective of this study is to evaluate the phenotypic diversity of physic nut in order to select the most divergent and superior genotypes to compose future breeding programs, using multivariate analysis. Eleven agronomic characters were evaluated in 165 J. curcas genotypes from the in vivo germplasm bank, which were: Plant height, stem diameter, number of primary branches, fruit length, width, weight and shape, seed length, width and weight plus the oil content. The data were analyzed by principal component analysis (PCA), cluster analysis by Ward and k-means methods. The character fruit shape was removed from the multivariate analysis as the only one with qualitative character. The PCA resulted in 4 main components (PC), which explained 71.62% of total variance. The characters selected in PC1 were seed weight, fruit width, fruit length and fruit weight. There were 22 promising genotypes highlighted, with potential to be exploited in breeding programs. Cluster analysis by Ward and k-means methods generated 9 groups influenced by all analyzed characters, of which five groups of genotypes had advantageous characters. Regarding fruit shape, 13 genotypes had an ellipsoid lanceolate shape and the others had an ellipsoid spherical shape. Multivariate analyses allowed genotype characterization, indicating good strategies used for the selection in genetic breeding programs.

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Phenotypic characterization of physic nut populations

Cited by 3 publications

References 17 publications

Development and Productivity of Jatropha curcas Plants Treated With Growth Regulators

Development and Productivity of Jatropha curcas Plants Treated With Growth Regulators

Growth of Jatropha curcas plants submitted to water deficit and increasing nitrogen doses

Phenotypic diversity in physic nut (Jatropha curcas L.) in vivo germplasm bank for superior parent selection

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