Phenotypic variability in genotypes of irrigated rice via multivariate analysis

Streck, Eduardo Anibele; Aguiar, Gabriel Almeida; Júnior, Ariano Martins de Magalhães; Facchinello, Paulo Henrique Karling; Oliveira, Antônio Costa de

doi:10.5935/1806-6690.20170011

Cited by 15 publications

(16 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The F test revealed significant effects for genotypes (p < 0.05) for the following traits: number of full grains per plant, full grains percentage, grain width and grain length/width ratio ( Table 2). The coefficients of variation estimated for most traits were compatible with those obtained in other studies of rice (Silva, Silva, Guimarães, & Moura, 2011;Hosan, Sultana, Iftekharuddaula, Ahmed, & Mia, 2010;Streck et al, 2017), emphasizing the acceptable test quality.…”

Section: Resultssupporting

confidence: 85%

“…However, this will only be possible as long as genetic variability is maintained. In Brazilian irrigated rice breeding programs, genotypic variability is restricted (Rabelo, Guimarães, Pinheiro, & Silva, 2015;Streck, Aguiar, Magalhães Júnior, Facchinello, & Oliveira, 2017); therefore, investigating the genetic diversity of rice genotypes is critical.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Self-organizing maps in the study of genetic diversity among irrigated rice genotypes

et al. 2018

View full text Add to dashboard Cite

This study presents self-organizing maps (SOM) as an alternative method to evaluate genetic diversity in plant breeding programs. Twenty-five genotypes were evaluated in two environments for 11 phenotypic traits. The genotypes were clustered according to the SOM technique, with variable topology and numbers of neurons. In addition to the SOM analysis, unweighted pair group method with arithmetic mean clustering (UPGMA) was performed to observe the behavior of the clustering when submitted to these techniques and to evaluate their complementarities. Genotype ordering according to SOM was consistent with UPGMA results, evidenced by the basic structure of UPGMA groups being preserved in each group of the maps. Regarding genotype arrangement and the group neighbors, maps involving five neurons presented inferior organization efficiency compared to the six-map arrangements in both environments. It was observed that the organization pattern among the rice genotypes evaluated by the maps was complementary to the UPGMA approach, as observed in all scenarios. It can be concluded that self-organizing maps have the potential to be useful for genetic diversity studies in breeding programs.

show abstract

Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Self-organizing maps in the study of genetic diversity among irrigated rice genotypes

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Result concordant with the study by Silva et al (2019). The estimated coefficients of variation for the characteristic were compatible with those obtained in other rice studies (Costa et al, 2002;Hosan et al, 2010;Silva et al, 2011;Streck et al, 2017;Santos et al, 2019;, emphasizing the acceptable test quality.…”

Section: Resultssupporting

confidence: 90%

Research Article Methods of adaptability and stability applied to the improvement of flooded rice

Júnior¹,

Carneiro²,

Santos³

et al. 2020

Genet. Mol. Res.

View full text Add to dashboard Cite

Rice (Oryza sativa) is crop that adapts well to diverse soil and climate conditions; breeding programs have generally been committed to identifying and selecting genotypes that are stable and have high productivity in various environments. In this sense, studies of adaptability and stability are of paramount importance to aid in the recommendation of cultivars, since it allows growers to obtain detailed information about the behavior of the genotypes in each region. We evaluatde the adaptability and stability of irrigated rice genotypes grown with continuous flooding, for the selection and recommendation of cultivars for crops or breeding programs. Eighteen genotypes were evaluated for grain yield in four agricultural years at three sites, covering 12 environments. The adaptability and stability were assessed by the methods of Eberhart and Russell, multiple centroids and GGE biplot. Genotypes behaved differently regarding stability and adaptability in the different environments. Both methodologies identified BRA 02691 and MGI 0607-1 as promising to be released as cultivars; however, classification inconsistencies occurred, such as for the line BRA 031001. Multiple centroid and GGE biplot methods demonstrated greater sensitivity ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 19 (3): gmr18434 A.C. Silva Junior et al. 2 than the Eberhart and Russell method. Using the methods simultaneously provides an innovative approach to the interpretation of GxE interactions and is a viable alternative for genotype classification. The genotype MGI 0607-1 showed promising behavior independent of the methodology used.

show abstract

“…The discovery of the sd-1 gene, responsible for the semidwarf rice, allowed breeders to include this phenotype (associated with other agronomic traits of interest) into flood-irrigated rice cultivars leading to increased yield potential, especially 'BR/IRGA 409' and 'BR/IRGA 410' in Rio Grande do Sul (Streck et al, 2017). In this context, it is verified that a large share of the cultivars released by the Embrapa breeding program, after the two mentioned ones, have aimed at lower-stature genotypes.…”

Section: (2017a)mentioning

confidence: 99%

Adaptability and stability of flood-irrigated rice cultivars released to the subtropical region of Brazil

Streck

Júnior

Fagundes

et al. 2018

Pesq. agropec. bras.

Self Cite

View full text Add to dashboard Cite

The objective of this work was to estimate the effects of genotype x environment interaction and the genetic potential of flood-irrigated rice cultivars, released between 1972 and 2017, for the state of Rio Grande do Sul, Brazil. The experiments were carried out in the field, in all agroclimatic regions of flood-irrigated rice crop in the state, between the 2005/2006 and 2015/2016 crop years, totaling 60 environments (trials), with 1,961 experimental units. Twenty-five cultivars of irrigated rice were evaluated for the traits grain yield, plant height, days to flowering, and whole grain quality after milling. The values of adaptability and stability were estimated with the aid of mixed models. The rice cultivars BRS Pampa, BRS Pampeira, and BRSCIRAD 302 showed simultaneously high-genotypic grain yield, adaptability, stability, good agronomic traits, and good whole-grain yield after milling. 'BRSCIRAD 302' and 'BRS Pampa' show high-yield stability and can be recommended for all rice cultivation regions of Rio Grande do Sul. 'BRS Pampeira' is responsive to environmental improvements and is indicated for high-technology conditions.

show abstract

Phenotypic variability in genotypes of irrigated rice via multivariate analysis

Cited by 15 publications

References 7 publications

Self-organizing maps in the study of genetic diversity among irrigated rice genotypes

Self-organizing maps in the study of genetic diversity among irrigated rice genotypes

Research Article Methods of adaptability and stability applied to the improvement of flooded rice

Adaptability and stability of flood-irrigated rice cultivars released to the subtropical region of Brazil

Contact Info

Product

Resources

About