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“yield decrease”

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Observationobservedoriginal resultsimulated

Claim · model-written summary

Selecting for pods per area was expected to decrease yield, seeds per pod, and seed weight.

Taxon: Phaseolus vulgaris L.Phaseolus vulgarist0
Outcome: yield, seeds/pod and seed weighte0
Direction: decreasee0

Verbatim

e0
“Direct selection for pods/m 2 would decrease yield, seeds/pod and seed weight”
✓ located verbatim in the source · abstract, characters 1507–1584

t0
“Phaseolus vulgaris L.”
✓ located verbatim in the source · title, characters 58–79

Title

Genetics of Seed Yield and its Components in Common Bean (Phaseolus vulgaris L.) of Middle‐American Origin

J. Nienhuis; S. P. Singh Plant Breeding 1988. doi:10.1111/j.1439-0523.1988.tb00281.x

Other claims from this paper (14)

Observation Additive genetic variance was significant for yield, pods per area, seeds per pod, and seed weight.
Observation Interaction with environments was significant.
Observation Nonadditive genetic variance was not significant for yield or its components.
Observation Narrow sense heritability was 0.21 ± 0.13 for yield.
Observation Narrow sense heritability was 20 ± 0.13 for pods per area as printed.
Observation Narrow sense heritability was 0.57 ± 0.13 for seeds per pod.
Observation Narrow sense heritability was 0.74 ± 0.15 for seed weight.
Observation Selecting the top 20% of F2 populations for yield was expected to increase yield by 4.30%.
Observation Selecting for yield was expected to increase seed weight by 0.21%.
Observation Selecting for seed weight was expected to increase seed weight by 11.76%.
Observation Selecting for seed weight was expected to increase yield by 0.28%.
Observation Selecting for seeds per pod was expected to reduce pods per area and seed weight.
Observation Selecting for seeds per pod was expected to increase seed yield by 0.37%.
Recommendation The authors suggested replicated early generation yield trials to identify promising crosses and families.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Coheritability of seed yield with tillers per plant decreased relative to tiller heritability.

Taxon: linseedt0
Outcome: seed yield with tillers per plante0
Direction: decreasee0
Comparator: heritability of plant height and tillers per plante0

Verbatim

e0
“it showed decrease in seed yield with tillers per plant over the heritability of plant height and tillers per plant, respectively”
✓ located verbatim in the source · abstract, characters 378–507

t0
“LINSEED”
✓ located verbatim in the source · title, characters 75–82

Title

COHERITABLE VARIATION AND DISCRIMINANT FUNCTION ANALYSIS FOR SEED YIELD IN LINSEED (Linum usitatissimum L.)

INGALE B.V Madras Agricultural Journal 1984. doi:10.29321/maj.10.a02495

Other claims from this paper (7)

Observation Most characters had greater coheritability with yield per plant than yield heritability, except tillers and height.
Observation Seed yield and plant height had high coheritability.
Recommendation The authors suggested flowering time, maturity, seed weight, capsule traits, and yield for yield improvement.
Recommendation Simultaneous selection for tiller number and plant height could increase yield.
Method / resource All single-character indices were less efficient than direct selection for seed yield.
Method / resource Two-character indices pairing yield with component traits were more efficient than direct selection.
Method / resource Adding characters to indices generally increased their efficiency, except the three-character index.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Estimated additive variance for yield and stalk lodging decreased in BS 10 and BS 11 from C0 to C6.

Taxon: maizeZea mayse1
Material: BS 10 and BS 11e0
Outcome: additive genetic variancee0
Direction: decreasee0
Qualifier: yield and stalk lodginge0

Verbatim

e0
“Estimates of additive genetic variance suggested a decrease from the C0 to C6 of BS 10 and BS 11 for yield and stalk lodging”
✓ located verbatim in the source · abstract, characters 574–698

e1
“maize (Zea mays L.) populations”
✓ located verbatim in the source · abstract, characters 94–125

Title

Estimation of genetic variability in two maize populations

L. R. Reeder; A. R. Hallauer; K. R. Lamkey Journal of Heredity 1987. doi:10.1093/oxfordjournals.jhered.a110419

Other claims from this paper (8)

Intervention effect BS 10 full-sib progeny grain yield increased 6.3 percent from C0 to C6.
Observation BS 11 full-sib progeny grain yield increased 5.7 percent from C0 to C6.
Observation BS 10 S1 line grain yield increased 11.6 percent from C0 to C6.
Observation BS11 S1 line grain yield increased 26.3 percent from C0 to C6.
Observation Estimated additive variance for ears per plant increased in BS 10 from C0 to C6.
Observation Dominance variance estimates generally increased after selection.
Observation BS11 dominance variance for yield and stalk lodging decreased.
Observation The authors infer that selection reduced genetic variability, although most estimated changes were small and statistically nonsignificant.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

S1 and half-sib selection reduced genetic variance for most traits.

Taxon: maizeZea mayse0
Material: S 1 and half‐sib derived populationse1
Outcome: genetic variancee1
Direction: decreasee1
Qualifier: for most traitse1

Verbatim

e0
“maize ( Zea mays L.)”
✓ located verbatim in the source · abstract, characters 74–94

e1
“a decrease in genetic variance for the S 1 and half‐sib derived populations for most traits”
✓ located verbatim in the source · abstract, characters 1502–1593

Title

Recurrent Selection for Grain Yield in a Maize Population¹

N. N. Mulamba; A. R. Hallauer; O. S. Smith Crop Science 1983. doi:10.2135/cropsci1983.0011183x002300030022x

Other claims from this paper (10)

Intervention effect Mass selection increased grain yield of BSK populations per se by 0.024 ± 0.009 Mg ha −1 per cycle.
Intervention effect Mass selection increased yield of testcrosses with CO by 0.026 ± 0.010 Mg ha −1 per cycle.
Intervention effect Mass selection increased yield of testcrosses with B73 by 0.028 ± 0.010 Mg ha −1 per cycle.
Intervention effect BSK yield rose 0.49% per cycle or 6.9% after 14 mass-selection cycles.
Association Yield gains coincided with later flowering.
Association Yield gains coincided with increased root and stalk lodging.
Association Yield gains coincided with increased grain moisture at harvest.
Association Yield gains coincided with higher ear placement.
Observation Mass-selected populations had no change in genetic variance.
Recommendation The authors recommend including other agronomic traits in BSK mass selection.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

The y\sb9 allele reduced yield by 333 kg per hectare.

Taxon: SoybeanGlycine maxe1
Gene: $y\sb9$e0
Outcome: yielde0
Direction: decreaseinferrede0
Value: $-$333 kg ha$\sp{-1}$e0

Verbatim

e0
“Individual gene effects on yield ranged from $-$333 kg ha$\sp{-1}$ for $y\sb9$ to +279 kg ha$\sp{-1}$ for $dt\sb1$.”
✓ located verbatim in the source · abstract, characters 696–811

e1
“Soybean (Glycine max (L.) Merr.)”
✓ located verbatim in the source · abstract, characters 0–32

Title

Agronomic responses to a factorial combination of soybean canopy modifying genes

Clement Weidenbenner Lincoln (University of Nebraska) 1989

Other claims from this paper (13)

Association The dt\sb1 allele increased yield by 279 kg per hectare.
Observation Yield epistasis occurred in six of ten two-way gene interactions.
Observation Pd\sb1Dt\sb1 yielded 2,284 kg per hectare.
Observation Pd\sb1dt\sb1 yielded 2,711 kg per hectare.
Observation pd\sb1Dt\sb1 yielded 2,466 kg per hectare.
Observation pd\sb1dt\sb1 yielded 2,597 kg per hectare.
Association Gene effects interacted with cultivar background.
Association Alleles for growth habit, leaf color and pubescence density significantly altered correlations among agronomic traits.
Association Yield and height were positively correlated for dt\sb1.
Mechanism Selection for yield in determinate lines would indirectly select taller plants.
Recommendation The authors found dt\sb1 most promising for soybean improvement.
Recommendation The authors found Lf\sb1ln a promising combination.
Recommendation The authors found Pd\sb1dt\sb1 a promising combination.

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

The authors infer that increased lodging limited yield benefits from growth stimulating genes.

Taxon: soybeanGlycine maxe1
Gene: Pd and Rps a le0
Outcome: seed yieldse0
Qualifier: increased lodging associated with the increased vegetative growthe0

Verbatim

e0
“failure of the vegetative growth stimulating genes, Pd and Rps a l , and to a lesser extent the ln gene, to increase seed yields, or in some cases significantly decrease yields, in the indeterminate near‐isogenic lines is duet to the increased lodging associated with the increased vegetative growth.”
✓ located verbatim in the source · abstract, characters 1291–1591

e1
“indeterminate soybean [ Glycine max (L.) Merr.] near‐isogenic lines”
✓ located verbatim in the source · abstract, characters 176–243

Title

Effect of Three Genes (Pd, Rps^a₁, and ln) on Plant Height, Lodging, and Seed Yield in Indeterminate and Determinate Near‐Isogenic Lines of Soybeans¹

R. L. Cooper; A. Waranyuwat Crop Science 1985. doi:10.2135/cropsci1985.0011183x002500010023x

Other claims from this paper (8)

Intervention effect Adding Pd to indeterminate lines increased plant height and lodging.
Intervention effect Adding Rps a l to indeterminate lines increased plant height and lodging.
Intervention effect Adding Pd to indeterminate lines reduced yield.
Intervention effect Adding Rps a l to indeterminate lines reduced yield.
Observation Determinate lines showed increased height without lodging.
Observation Determinate lines showed increased or unchanged yields.
Association The ln gene differed in effect between Clark and Harosoy.
Recommendation The authors advise evaluating growth genes in backgrounds without yield limiting lodging.

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“yield decrease”

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