Capacidade combinátoria de capim elefante com base em caracteres morfoagronômicos

Silva, Vanessa Quitete Ribeiro da; Daher, Rogério Figueiredo; Gravina, Geraldo de Amaral; Lédo, Francisco José da Silva; Tardin, F. D.; Souza, Max Campos de

doi:10.17523/bia.v71n1p63

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…In the harvest performed at 12 weeks of age, there was an increase in relation to the previous harvest for the traits %DM, %LIG, and C: N, and also DMY, the trait of greatest importance for elephant grass, which averaged 6.60 and 15.55 t.ha −1 in the first and second harvests, respectively. Similar dry matter yields were obtained by Silva et al (2014), who evaluated elephant grass hybrids with high production potential in Campos dos Goytacazes -RJ, Brazil.…”

Section: Variance Analysis By Production Agesupporting

confidence: 74%

Production potential and chemical composition of elephant grass (Pennisetum purpureum Schum.) at different ages for energy purposes

Vidal¹,

Barbé²,

Daher³

et al. 2017

Afr. J. Biotechnol.

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The elephant grass has gained prominence as one of the main forage species used for biomass production. Therefore, the aim of this study was to identify elephant grass genotypes with high energy biomass production potential by evaluating morpho-agronomic and biomass quality. The following traits were evaluated in this study: dry matter yield (DMY), percentage of whole-plant dry matter (%DM), percentage of neutral detergent fiber (%NDF), percentage of acid detergent fiber (%ADF); percentage of cellulose (%CEL), percentage of lignin (%LIG), percentage of carbon (%C), percentage of nitrogen (%N), and carbon: nitrogen ratio (C: N). Five different production ages were evaluated, and significant differences were observed for the variable DMY. The harvests performed at 20 and 24 weeks of age, provided the best response for biomass energy production (DMY) from elephant grass, averaging 20.50 and 23.77 t.ha −1. The genotypes that most stood out during the evaluation period at the five production ages were King Grass, Mole de Volta Grande, and Mercker 86-México. Genotypes Mole de Volta Grande and King Grass are the most suitable for elephant grass breeding programs aimed at biomass energy production in the conditions of Campos dos Goytacazes-RJ, Brazil.

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Section: Variance Analysis By Production Agesupporting

confidence: 74%

Production potential and chemical composition of elephant grass (Pennisetum purpureum Schum.) at different ages for energy purposes

Vidal¹,

Barbé²,

Daher³

et al. 2017

Afr. J. Biotechnol.

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“…Crossings were performed following the method described by Silva et al (2011). It consisted of collecting pollen grains from elephant grass genotypes (male parents), in paper bags, and then taking them to the female flowers, when inflorescence stigmas (protected by a paper bag) were receptive.…”

Section: Methodsmentioning

confidence: 99%

Selection among and within full-sib families of elephant grass for energy purposes

Silva

Daher

Menezes

et al. 2018

Crop Breed. Appl. Biotechnol.

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Pennisetum purpureum Schum. has been a key alternative as an energy source in Brazil because of its higher dry matter accumulation and fiber content. This research aimed to select superior individuals of P. purpureum for energy purposes using among-and-within family selection. The study was carried out in Campos dos Goytacazes-RJ (Brazil), using eight full-sib families. Plants were individually assessed during two pasture cuttings, one in 2014, and another in 2015. The dry matter production (DMP) was correlated with the number of tillers, stem diameter, plant height, and neutral detergent fiber content. Plant selection criteria in both cuts were through direct and indirect selections, and Smith and Hazel index. A joint analysis of variance showed significant differences for all five traits assessed in both cuts. The results achieved with Smith and Hazel index were promising for simultaneous selection of the evaluated traits, favoring selection of superior families and individuals them.

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“…Manual crossings were performed according to Silva et al (2014), pollen grains of elephant grass genotypes (male genitor) were collected in paper bags and then brought to female genotypes when their inflorescences, duly protected with a paper bag, had receptive stigmas. Emasculate process was not needed because of protogyny (Passos et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

Research Article Prediction of genetic gains by selection indices using mixed models in elephant grass for energy purposes.

Silva

Daher

Araújo³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. Genetically improved cultivars of elephant grass need to be adapted to different ecosystems with a faster growth speed and lower seasonality of biomass production over the year. This study aimed to use selection indices using mixed models (REML/BLUP) for selecting families and progenies within full-sib families of elephant grass (Pennisetum purpureum) for biomass production. One hundred and twenty full-sib progenies were assessed from 2014 to 2015 in a randomized block design with three replications. During this period, the traits dry matter production, the number of tillers, plant height, stem diameter, and neutral detergent fiber were assessed. Families 3 and 1 were the best classified, being the most indicated for selection effect. Progenies 40, 45, 46, and 49 got the first positions in the three indices assessed in the first cut. The gain for individual 40 was 161.76% using Mulamba and Mock index. The use of selection indices using mixed models is advantageous in elephant grass since they provide high gains with the selection, which are distributed among all the assessed traits in the most appropriate situation to breeding programs.

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Capacidade combinátoria de capim elefante com base em caracteres morfoagronômicos

Abstract: da silVa lédo 4 , FláVio dessaune taRdin 5 , max campos de souza 6 1 Recebido para publicação em 23/11/13. Aceito para publicação em 25/03/14.

Cited by 6 publications

References 16 publications

Production potential and chemical composition of elephant grass (Pennisetum purpureum Schum.) at different ages for energy purposes

Production potential and chemical composition of elephant grass (Pennisetum purpureum Schum.) at different ages for energy purposes

Selection among and within full-sib families of elephant grass for energy purposes

Research Article Prediction of genetic gains by selection indices using mixed models in elephant grass for energy purposes.

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