Parâmetros genéticos de caracteres agronômicos em genótipos de mamoneira

Passos, Adriana Rodrigues; Silva, Simone Alves; Souza, Cássia da Silva; Souza, Carlos Magno Marques de; Fernandes, Luciel dos Santos

doi:10.1590/s0100-204x2010000700011

Cited by 11 publications

(9 citation statements)

References 7 publications

(3 reference statements)

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“…PASSOS et al (2010) reported the heritability for this character as being 28%, 47%, 69% and 38%, in the fixed and segregant populations of crosses of different castor bean cultivars. DA SILVA et al (2011) in their study characterizing the cashew cultivars indicated for cultivation in South Brazil confirmed the heritability for this character as 25%; they indicated that the environmental conditions of temperature, sufficient precipitation and fertilization can support plant growth, whereas the unfavorable conditions could induce losses in this character.…”

Section: Resultsmentioning

confidence: 99%

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Silva

Almeida

et al. 2017

Cienc. Rural

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As castor bean (Ricinus communis L.) reveals immense adaptability to various ecological conditions and due to its socioeconomic significance, new studies have emerged primarily to develop more productive cultivars to suit different regions in Brazil. This study aimed to confirmthe correlations and direct and indirect effects of the morphoagronomic descriptors on castor bean productivity, employing correlation studies and track analysis. Between 2014 and 2015, experiments utilizing the randomized block design were performed, with four replications, which included 208 treatments involving pedigree and parental lines of castor bean, drawn from the germplasm bank of the Universidade Federal do Recôncavo da Bahia. Variables in the correlation analysis included primary racemic insertion, stem diameter, number of stem internodes, plant flowering, plant height, racemic length, number of fruits per raceme, fruit weight per raceme, seed yield per fruit and productivity. Correlations among the variables analyzed were imposed, via track analysis, on the direct and indirect influences of the morphoagronomic descriptors on productivity. The most direct and positively influential descriptors included fruit weight per raceme and number of seeds per raceme; the most direct albeit negatively influential descriptors are the number of internodes on the stem and flowering. Therefore, lines with less number of internodes and requiring fewer days to bloom are more highly productive. These descriptors can thus effectively identify the productive lines.

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Section: Resultsmentioning

confidence: 99%

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Silva

Almeida

et al. 2017

Cienc. Rural

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“…Vegetative cycle presented a value of 0.23 for broad-sense heritability. This value is considered low compared to the results obtained by PASSOS et al (2010). Those authors evaluated the vegetative cycle for crosses that originated the population under study, and reported the following values: 0.64 ('BRS 149 Northeast' × 'EBDA'); 0.38 ('BRS 149 Nordestina' × 'Sipeal 28'), 0.86 ('BRS 149 Nordestina' × 'Mirante 10') and 0.65 ('BRS 188 Paraguaçu' × 'EBDA MPA 17').…”

Section: ------------------------------------------------------------mentioning

confidence: 70%

“…The great variability among castor bean genotypes means there is a large genetic base for the creation of new strains with favorable genetic combinations. Therefore, a substantial challenge for breeders is to aggregate the highest possible frequency of desirable alleles in a single genotype (SEVERINO et al, 2006;PASSOS et al, 2010;PATEL & PATEL, 2014;SILVA et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Palavras-chave: mamoneira, correlação genética, Herdabilidade, melhoramento genético. Santos et al genetic improvement, since they provide information on genetic variability, the degree of expression of a character between generations, and the possibility of gains through direct or indirect selection (ROCHA et al, 2003;PASSOS et al, 2010). Although, some studies investigating genetic parameters have been carried out on castor bean plants (OLIVEIRA & ZANOTTO, 2008;PASSOS et al, 2010;DA SILVA et al, 2011;OLIVEIRA et al, 2013;), further studies are needed to obtain improved materials.…”

Section: Introductionmentioning

confidence: 99%

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Genetic parameters in agronomic characters for selection of superior lineages of Ricinus communis L

et al. 2019

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Knowledge on the variability and heritability of agronomic characters of interest aid the selection of superior materials. Thus, the objective of this study was to evaluate the genetic parameters of agronomic traits in castor bean plant lineages and to quantify the genetic correlations between them. The study was performed in the experimental area of the Federal University of the Recôncavo da Bahia, Cruz das Almas, Bahia. Seed oil content, vegetative cycle, plant height, and the number and weight of seeds per plant were evaluated in 47 lineages of castor bean seedlings. The coefficient of genetic variation was higher for weight of seeds per plant, revealing greater variability. The broad-sense heritability of individual plots presented a higher value for oil content and a lower value for seed number per plant. Selection precision was moderate for plant height, number and weight of seeds per plant, high for vegetative cycle, and very high for oil content. The genetic parameters allowed superior genotypes to be ranked and selected. Positive correlations between vegetative cycle and plant height, associated with negative correlations for number and weight of seeds, and oil content, allow significant gains for crop productivity.

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“…Its valid mention that, generally, in the city of Araçatuba were observed the highest estimates of heritability, indicating that besides the possibility of genetic gain with the progeny selection, this environment also favors the choice of more stable progenies, being this reasoning shared by Silva et al (2011), that observed relation between heritability and phenotypic stability face of environmental variations (Silveira et al, 2016;Passos et al, 2010). High estimates of heritability also demonstrate good genetic control, assuming that the most of the observed variation in castor bean plants was genetic in nature (Cruz Neto et al, 2016).…”

Section: Continuaçãomentioning

confidence: 86%

Productive potential and castor bean selection of the FCA-PB cultivar progenies

et al. 2020

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Castor bean is a very important crop, however, in Brazil it still has relatively low productivity, 0.47 Mg ha-1 as a mean. Besides that the Country has significant castor oil demand and depends on international commerce to complement its production. The solution of these problems goes through the development of genotypes highly productive and adapted to the producing regions. So, the objective of this research was to evaluate the productive potential and selection of castor progenies of the cultivar FCA-PB, resulting from three types of pollination, in two crops and in two localities of the State of São Paulo. Grain productivity was evaluated, and some genetic parameters were estimated. In relation to the 2005/2006 crop, the progeny 49 cultivated in the locality of São Manuel produced 4170.66 kg ha-1 of grains. The highest heritability coefficients were observed in the 2005/2006 crop in the locacity of Araçatuba.

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Parâmetros genéticos de caracteres agronômicos em genótipos de mamoneira

Cited by 11 publications

References 7 publications

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Correlations and track analysis for morphoagronomic descriptors in pedigree and parental lines of castor bean

Genetic parameters in agronomic characters for selection of superior lineages of Ricinus communis L

Productive potential and castor bean selection of the FCA-PB cultivar progenies

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