Abstract
Random genetically heterogeneous, F 2 ‐derived maternal lines and genetically homogeneous, F 5 ‐derived daughter lines of two soybean crosses were evaluated for nine characters in three environments in the F 0 ‐F 7 generations. Heritability was relatively consistent across environments for all traits except seed yield. For yield, heritability was greatest under favorable growth conditions and least when moisture stress was alleviated by irrigation. Variability over environments in correlations of all traits with yield was related largely to the degree of moisture stress in each environment. Crosses revealed similar magnitudes of correlation with yield for all traits except chemical composition. This was related to the chemical composition of parents used in these crosses. Correlations of early lodging with yield in genetically homogeneous lines were generally greater than for genetically heterogeneous lines. This was related to the relative uniformity of the plant canopy in these populations. Because of the inconsistency in character associations, predictions of yield advance from selection in any environment were inaccurate estimates of actual advance evaluated over environments. Selection of yield invariably resulted in maximum actual yield advance. Chemical composition was generally the best yield predictor for heterogeneous lines, while early lodging was the most effective trait for correlated yield selection in genetically homogeneous lines.
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Claims 10
Claim · model-written summary
Heritability was relatively consistent across environments except for seed yield.
- Taxon
- Soybeans
Glycine maxt0 - Outcome
- Heritabilitye0
- Qualifier
- except seed yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heritability was relatively consistent across environments for all traits except seed yield”
t0“Soybeans”
Claim · model-written summary
Yield heritability was greatest under favorable growth conditions.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- heritabilitye0
- Direction
- greateste0
- Setting
- favorable growth conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For yield, heritability was greatest under favorable growth conditions”
t0“Soybeans”
Claim · model-written summary
Yield heritability was least when irrigation alleviated moisture stress.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- irrigatione0
- Outcome
- heritabilitye1
- Direction
- leaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“least when moisture stress was alleviated by irrigation”
e1“For yield, heritability”
t0“Soybeans”
Claim · model-written summary
Environment variation in trait correlations with yield was largely related to moisture stress.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- correlations of all traits with yielde0
- Setting
- each environmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variability over environments in correlations of all traits with yield was related largely to the degree of moisture stress in each environment”
t0“Soybeans”
Claim · model-written summary
Crosses had similar correlations of traits with yield except for chemical composition.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- magnitudes of correlation with yielde0
- Qualifier
- except chemical compositione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crosses revealed similar magnitudes of correlation with yield for all traits except chemical composition”
t0“Soybeans”
Claim · model-written summary
Early lodging correlated more strongly with yield in homogeneous than heterogeneous lines.
- Taxon
- SoybeansGlycine maxt0
- Material
- genetically homogeneous linese0
- Outcome
- Correlations of early lodging with yielde0
- Direction
- greatere0
- Comparator
- genetically heterogeneous linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlations of early lodging with yield in genetically homogeneous lines were generally greater than for genetically heterogeneous lines”
t0“Soybeans”
Claim · model-written summary
Trait associations gave inaccurate predictions of yield advance across environments.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- predictions of yield advancee0
- Comparator
- actual advance evaluated over environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“predictions of yield advance from selection in any environment were inaccurate estimates of actual advance evaluated over environments”
t0“Soybeans”
Claim · model-written summary
Selecting directly for yield gave maximum actual yield advance.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- Selection of yielde0
- Outcome
- actual yield advancee0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Selection of yield invariably resulted in maximum actual yield advance”
t0“Soybeans”
Claim · model-written summary
Chemical composition was the best yield predictor for heterogeneous lines.
- Taxon
- SoybeansGlycine maxt0
- Material
- heterogeneous linese0
- Outcome
- yield predictore0
- Comparator
- Chemical compositione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical composition was generally the best yield predictor for heterogeneous lines”
t0“Soybeans”
Claim · model-written summary
Early lodging was the most effective correlated selection trait for yield in homogeneous lines.
- Taxon
- SoybeansGlycine maxt0
- Material
- genetically homogeneous linese0
- Outcome
- correlated yield selectione0
- Comparator
- early lodginge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early lodging was the most effective trait for correlated yield selection in genetically homogeneous lines”
t0“Soybeans”