Abstract
Brazilian breeding programs usually aim at finding genotypes with early cycle and high grain yield. Thus, this study aimed to select early soybean lines with high grain yield for the Cerrado region. The experiment was carried out in the 2017-2018 season, in the Universidade Federal de Mato Grosso do Sul, Campus Chapadão do Sul, and consisted of an augmented blocks design, using 196 lines and ten controls, with five replications for each control. The experiment evaluated the traits plant height, number of days to flowering, and grain yield. After verifying the genetic variability for all traits, two selection methods were evaluated, the direct selection in each trait and the simultaneous selection (to decrease plant height and number of days to flowering and increase grain yield, using the Mulamba and Mock index). The latter considered two scenarios were when establishing the economic weight: the coefficient of genotypic variation (CVg) and arbitrary weights. Direct selection on the variables had unsatisfactory results. The Mulamba and Mock revealed unsatisfactory results when using CVg as the economic weight and satisfactory results when using arbitrary weights.
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Claims 3
Claim · model-written summary
Direct selection on the variables gave unsatisfactory results compared with the simultaneous selection.
- Taxon
- soybean
Glycine maxt0 - Outcome
- Direct selection on the variablese1
- Direction
- unsatisfactorye1
- Comparator
- the simultaneous selectione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean populations for earliness and high grain yield”
e1“Direct selection on the variables had unsatisfactory results”
e2“two selection methods were evaluated, the direct selection in each trait and the simultaneous selection”
Claim · model-written summary
The Mulamba and Mock index gave unsatisfactory results when CVg was used as the economic weight.
- Taxon
- soybeanGlycine maxt0
- Outcome
- resultse3
- Direction
- unsatisfactorye3
- Qualifier
- when using CVg as the economic weighte3
- Comparator
- arbitrary weightse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean populations for earliness and high grain yield”
e3“The Mulamba and Mock revealed unsatisfactory results when using CVg as the economic weight”
e4“satisfactory results when using arbitrary weights”
Claim · model-written summary
The Mulamba and Mock index gave satisfactory results when arbitrary weights were used instead of CVg.
- Taxon
- soybeanGlycine maxt0
- Outcome
- resultse4
- Direction
- satisfactorye4
- Comparator
- CVg as the economic weighte3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean populations for earliness and high grain yield”
e4“satisfactory results when using arbitrary weights”
e3“The Mulamba and Mock revealed unsatisfactory results when using CVg as the economic weight”