Abstract
The objectives of this study were to use mixed models to confirm the presence of genetic variability in 16 soybean genotypes, to compare clusters generated by artificial neural networks (ANNs) with those created by the Ward modified location model (MLM) technique, and to indicate parental combinations that hold promise for obtaining superior segregating populations of soybean. A field trial was conducted between November 2014 and February 2015 at Universidade Estadual de Mato Grosso do Sul, Aquidauana, MS. The experimental design consisted of four replications of randomized blocks, each containing 16 treatments. We assessed the following agronomic traits: plant height, first pod height, number of branches per plant, number of pods per plant, number of grains per pod, hundred-grain weight, and grain yield. Mixed models were used to estimate variance components and genetic parameters, and obtain genotypic values for each trait. After verifying the presence of genetic variability for all traits, genotypic values were submitted to both a Ward-MLM procedure and ANNs to estimate genetic divergence among genotypes. The number of groups formed by both methods was the same, but there were differences in group constitutions. ANN analysis improved soybean genotypes clustering patterns compared to Ward-MLM procedure. Based on these methods, divergent crosses may be made between genotype 97R73 with genotypes AS3797 and SYN9070, whereas convergent crosses may be made between genotypes AS3797 and SYN9070.
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Claims 6
Claim · model-written summary
ANN clustering improved soybean genotype clustering patterns compared with the Ward-MLM procedure.
- Taxon
- soybean
Glycine maxe4 - Outcome
- clustering patternse4
- Direction
- improvede4
- Comparator
- Ward-MLM proceduree4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“ANN analysis improved soybean genotypes clustering patterns compared to Ward-MLM procedure”
Claim · model-written summary
ANN and Ward-MLM formed the same number of groups.
- Taxon
- soybeanGlycine maxt0
- Outcome
- number of groupse3
- Direction
- samee3
- Comparator
- Ward-MLM proceduree4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Clustering of soybean genotypes via Ward-MLM and ANNs associated with mixed models”
e3“The number of groups formed by both methods was the same, but there were differences in group constitutions”
e4“ANN analysis improved soybean genotypes clustering patterns compared to Ward-MLM procedure”
Claim · model-written summary
ANN and Ward-MLM clustering differed in group constitutions.
- Taxon
- soybeanGlycine maxt0
- Outcome
- group constitutionse3
- Direction
- differencese3
- Comparator
- Ward-MLM proceduree4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Clustering of soybean genotypes via Ward-MLM and ANNs associated with mixed models”
e3“The number of groups formed by both methods was the same, but there were differences in group constitutions”
e4“ANN analysis improved soybean genotypes clustering patterns compared to Ward-MLM procedure”
Claim · model-written summary
Genetic variability was verified for all traits in 16 soybean genotypes.
- Taxon
- soybeanGlycine maxe1
- Material
- 16 soybean genotypese1
- Outcome
- presence of genetic variabilitye2
- Qualifier
- for all traitse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“to confirm the presence of genetic variability in 16 soybean genotypes”
e2“After verifying the presence of genetic variability for all traits”
Claim · model-written summary
Divergent crosses may be made between genotype 97R73 and genotypes AS3797 and SYN9070.
- Taxon
- soybeanGlycine maxt0
- Material
- 97R73e5
- Outcome
- divergent crossese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Clustering of soybean genotypes via Ward-MLM and ANNs associated with mixed models”
e5“divergent crosses may be made between genotype 97R73 with genotypes AS3797 and SYN9070”
Claim · model-written summary
Convergent crosses may be made between genotypes AS3797 and SYN9070.
- Taxon
- soybeanGlycine maxt0
- Material
- AS3797 and SYN9070e6
- Outcome
- convergent crossese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Clustering of soybean genotypes via Ward-MLM and ANNs associated with mixed models”
e6“convergent crosses may be made between genotypes AS3797 and SYN9070”