Genetic variability and divergence studies in seed traits and oil content of Jatropha (Jatropha curcas L.) accessions

Kaushik, Nutan; Kumar, K. R.; Kumar, Sushil; Roy, Suvra

doi:10.1016/j.biombioe.2007.01.021

Cited by 289 publications

(230 citation statements)

References 7 publications

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“…Moreover, there are reports of positive correlation between grain weight and oil yield (Ginwal et al, 2004;Kaushik et al, 2007;Rao et al, 2008;Spinelli et al, 2010), which, if confirmed, can lead to reduced oil content after several selecting cycles for grain yield. Therefore, the use of selection indexes is important to avoid significant reduction in W 100 due to genetic breeding for grain yield.…”

Section: Resultsmentioning

confidence: 92%

“…However, the restricted index provided the largest gain in grain yield (31.88%), without negative impact in grain weight. Considering the positive correlation between grain weight and oil content (Ginwal et al, 2004;Kaushik et al, 2007;Rao et al, 2008;Spinelli et al, 2010), this methodology can be an interesting option to improve grain yield without affecting other production components.…”

Section: Resultsmentioning

confidence: 99%

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Genetic gains in physic nut using selection indexes

Bhering

Laviola

Salgado

et al. 2012

Pesq. agropec. bras.

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-The objective of this work was to estimate genetic gains in physic nut (Jatropha curcas) using selection indexes and to establish the best selection strategy for the species. Direct and indirect selection was carried out using different selection indexes, totalizing 14 strategies. One hundred and seventy five families from the active germplasm bank of Embrapa Agroenergy, Brasília, Brazil, were analyzed in a randomized complete block design with two replicates. The evaluated traits were: grain yield; seeds per fruit; endosperm/ seed ratio; seed weight, length, width, and thickness; branches per plant at 0.5, 1.0, and 1.5 m; plant height; stem diameter; canopy projection on rows and between lines; canopy volume; juvenility (days to the first flowering); and height of the first inflorescence. Evaluations were done during the second year of cultivation. The use of selection indexes is relevant to maximize the genetic gains in physic nut, favoring a better distribution of desirable traits. The multiplicative and restrictive indexes are considered the most promising for selection.Index terms: Jatropha curcas, biodiesel, canopy volume, Cerrado, juvenility, seed size. Ganho genético em pinhão-manso com uso de índices de seleçãoResumo -O objetivo deste trabalho foi estimar o ganho genético em pinhão-manso (Jatropha curcas) com uso de diferentes índices de seleção e estabelecer a melhor estratégia de seleção para a espécie. A seleção direta e indireta foi realizada com diferentes índices de seleção, o que totalizou 14 estratégias. Foram analisadas 175 famílias pertencentes ao banco ativo de germoplasma da Embrapa Agroenergia, em blocos ao acaso, com duas repetições. Foram avaliadas as variáveis: produtividade de grãos; sementes por fruto; razão endosperma/ semente; peso, comprimento, largura e espessura de sementes; número de ramos a 0,5, 1,0 e 1,5 m; altura de plantas; diâmetro do caule; projeção da copa nas linhas e nas entrelinhas; volume da copa; juvenilidade (dias até o florescimento); e altura de inserção da primeira inflorescência. As avaliações foram realizadas durante o segundo ano de cultivo. A utilização de índices de seleção é relevante para maximizar os ganhos genéticos em pinhão-manso e favorece uma melhor distribuição de características desejáveis. Os índices multiplicativos e restritivos são considerados os mais promissores para uso na seleção.Termos para indexação: Jatropha curcas, biodiesel, volume de copa, Cerrado, juvenilidade, tamanho de sementes.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Genetic gains in physic nut using selection indexes

Bhering

Laviola

Salgado

et al. 2012

Pesq. agropec. bras.

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“…Rao et al (2008) reported variability observed in Central India which was mainly limited to seed source variation in morphology, germination and seedling growth. Kaushik et al (2007) have reported divergence in seed oil traits of from a limited number of locally collected accessions. Since heritability estimate in perennial plants decrease with age because of compounded environmental effects making genotypic differences, there is an urgent need for the knowledge of these estimates in the progenies (Rao et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Genetic variation and heritability estimation in Jatropha curcas L. progenies for seed yield and vegetative traits

Kaushik

Deswal

Malik

et al. 2015

JANS

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Abstract:In this study, experiment was conducted on sandy loam soils poor in organic carbon and water holding capacity in southern Haryana, India to determine the best progenies of Jatropha curcas for bio-diesel production. Fifty progenies raised from seed sources collected from nine states of India were evaluated after five years of plantation for growth, seed and oil content traits. The progenies showed significant (P> 0.05) differences for all the traits studied. Maximum seed yield/plant (879.37 g), number of capsules/plant (522.67) and plant height (408.33 cm) was recorded in P-44. Maximum oil content observed in P-37 (36.08%) followed by P-5 (35.64%). The magnitude of phenotypic coefficient of variation (PCV) was higher than the corresponding genotypic coefficient of variation (GCV) for all the characters studied. Heritability was highest for oil content (95.49%) and 100-seed weight (87.75%) followed by seed yield (75.54%). Total capsules/plant exhibited highest genetic advance (92.69%) followed by number of branches per plant (64.32%). Hierarchical Euclidean cluster analysis of all 50 progenies using D 2 statistics was done where the D 2 analysis grouped the progenies into five clusters. The intra cluster distances ranged from 1.33 to 2.72. The maximum inter-cluster distance was observed between cluster II and V (6.43) followed by I and V indicating greater divergence among progenies belonging to these clusters and an attempt to cross the progenies in these clusters should bring out desirable gene combinations. These progenies showed considerable potential which can be tapped for planting and selecting the improved varieties.

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“…Kaushik et al (2007) reportaram alta herdabilidade e ganhos genéticos para conteúdo de óleo e peso de sementes -indício de ação gênica aditiva -, bem como correlação positiva entre massa de sementes e conteúdo de óleo.…”

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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Genetic variability and divergence studies in seed traits and oil content of Jatropha (Jatropha curcas L.) accessions

Cited by 289 publications

References 7 publications

Genetic gains in physic nut using selection indexes

Genetic gains in physic nut using selection indexes

Genetic variation and heritability estimation in Jatropha curcas L. progenies for seed yield and vegetative traits

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

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