Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production

In forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatabil...
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Autor*in:	Erina Vitório Rodrigues [verfasserIn] Rogério Figueiredo Daher [verfasserIn] Geraldo de Amaral Gravina [verfasserIn] Alexandre Pio Viana [verfasserIn] Maria do Socorro Bezerra de Araújo [verfasserIn] Maria Lorraine Fonseca Oliveira [verfasserIn] Marcelo Vivas [verfasserIn] Bruna Rafaela da Silva Menezes [verfasserIn] Antônio Vander Pereira [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	pennisetum purpureum s. coefficient of determination main components dry matter yield

Übergeordnetes Werk:	In: Bioscience Journal - Universidade Federal de Uberlândia, 2020, 36(2020), 1
Übergeordnetes Werk:	volume:36 ; year:2020 ; number:1

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.14393/BJ-v36n1a2020-42075

Katalog-ID:	DOAJ062918915

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author	Erina Vitório Rodrigues
spellingShingle	Erina Vitório Rodrigues misc QH301-705.5 misc pennisetum purpureum s. misc coefficient of determination misc main components misc dry matter yield misc Agriculture misc S misc Biology (General) Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production
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topic_title	QH301-705.5 Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production pennisetum purpureum s. coefficient of determination main components dry matter yield
topic	misc QH301-705.5 misc pennisetum purpureum s. misc coefficient of determination misc main components misc dry matter yield misc Agriculture misc S misc Biology (General)
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title	Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production
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title_full	Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production
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title_sort	repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production
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title_auth	Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production
abstract	In forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatability is essential in improvement of perennials, it allows predicting genotypic value of the individual, the minimum number of evaluations in the selection of genotypes and minimizes resources and time in the selection of promising individuals. The objective of this study was to estimate the repeatability coefficient for morphological traits in elephant grass and determine the number of evaluations needed for phenotypic selection more efficient. The experimental randomized block design with 53 genotypes and two replications. The repeatability coefficients were estimated for variables plant height, number of tillers, stem diameter and dry matter yield, using the methods of Anova, Principal Components and Structural Analysis. We observed significant differences between genotypes (P <0.01) for all variables. The main components provide larger estimates of repeatability when compared to other methods. Estimates of the repeatability coefficients are of high magnitude average for the variables plant height (0.44) number of tillers (0.44) and stem diameter (0.63) and low magnitude for dry matter production (0.27). The Principal Components method requires five, five, two and eleven measurements for plant height, number of tillers, stem diameter and dry matter yield, respectively, with 80% reliability.
abstractGer	In forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatability is essential in improvement of perennials, it allows predicting genotypic value of the individual, the minimum number of evaluations in the selection of genotypes and minimizes resources and time in the selection of promising individuals. The objective of this study was to estimate the repeatability coefficient for morphological traits in elephant grass and determine the number of evaluations needed for phenotypic selection more efficient. The experimental randomized block design with 53 genotypes and two replications. The repeatability coefficients were estimated for variables plant height, number of tillers, stem diameter and dry matter yield, using the methods of Anova, Principal Components and Structural Analysis. We observed significant differences between genotypes (P <0.01) for all variables. The main components provide larger estimates of repeatability when compared to other methods. Estimates of the repeatability coefficients are of high magnitude average for the variables plant height (0.44) number of tillers (0.44) and stem diameter (0.63) and low magnitude for dry matter production (0.27). The Principal Components method requires five, five, two and eleven measurements for plant height, number of tillers, stem diameter and dry matter yield, respectively, with 80% reliability.
abstract_unstemmed	In forage-plants breeding, the selection of superior genotypes has been undertaken through successive harvests in previously established intervals. However, this process involves many steps, the evaluation of many traits, and a great spending with costs and labor. Thus the estimate of the repeatability is essential in improvement of perennials, it allows predicting genotypic value of the individual, the minimum number of evaluations in the selection of genotypes and minimizes resources and time in the selection of promising individuals. The objective of this study was to estimate the repeatability coefficient for morphological traits in elephant grass and determine the number of evaluations needed for phenotypic selection more efficient. The experimental randomized block design with 53 genotypes and two replications. The repeatability coefficients were estimated for variables plant height, number of tillers, stem diameter and dry matter yield, using the methods of Anova, Principal Components and Structural Analysis. We observed significant differences between genotypes (P <0.01) for all variables. The main components provide larger estimates of repeatability when compared to other methods. Estimates of the repeatability coefficients are of high magnitude average for the variables plant height (0.44) number of tillers (0.44) and stem diameter (0.63) and low magnitude for dry matter production (0.27). The Principal Components method requires five, five, two and eleven measurements for plant height, number of tillers, stem diameter and dry matter yield, respectively, with 80% reliability.
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title_short	Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production
url	https://doi.org/10.14393/BJ-v36n1a2020-42075 https://doaj.org/article/8f9f27da3ddb4924a3f3fa5ec0d32327 http://www.seer.ufu.br/index.php/biosciencejournal/article/view/42075 https://doaj.org/toc/1981-3163
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author2	Rogério Figueiredo Daher Geraldo de Amaral Gravina Alexandre Pio Viana Maria do Socorro Bezerra de Araújo Maria Lorraine Fonseca Oliveira Marcelo Vivas Bruna Rafaela da Silva Menezes Antônio Vander Pereira
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Repeatability estimates and minimum number of evaluations for selection of elephant-grass genotypes for herbage production

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