Abstract
Patterns of resource allocation were investigated to analyze variations in adaptive mechanisms in 54 strains of the complex Oryza perennis, which exhibited a perennial-annual continuum. The proportion of seed weight to total dry weight, an indication of reproductive effort, ranged from near 0% in some perennials to 50% in some Asian wild annual strains and in cultivars of O. sativa which were tested for comparison. In general, annual strains allocated more energy to the production of seeds and awns. while perennial strains allocated more energy to the production of vegetative organs and anthers. Patterns of resource allocation were associated with various life history characteristics that affect breeding systems and stress tolerances. Allocation patterns must be the products of natural selection in different habitats, and such selection must have given rise to genetic differentiation of this complex species into forms with varying adaptive strategies.
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Claims 6
Claim · model-written summary
The proportion of seed weight to total dry weight ranged from near 0% in some perennials to 50% in some Asian wild annual strains.
Verbatim
t0“Oryza perennis Moench”
e1“The proportion of seed weight to total dry weight, an indication of reproductive effort, ranged from near 0% in some perennials to 50% in some Asian wild annual strains and in cultivars of O. sativa which were tested for comparison”
Claim · model-written summary
Annual strains allocated more energy to the production of seeds and awns than perennial strains.
Verbatim
t0“Oryza perennis Moench”
e2“In general, annual strains allocated more energy to the production of seeds and awns”
e3“while perennial strains allocated more energy to the production of vegetative organs and anthers”
Claim · model-written summary
Perennial strains allocated more energy to vegetative organs and anthers than annual strains.
Verbatim
t0“Oryza perennis Moench”
e2“In general, annual strains allocated more energy to the production of seeds and awns”
e3“while perennial strains allocated more energy to the production of vegetative organs and anthers”
Claim · model-written summary
Patterns of resource allocation were associated with life history characteristics that affect breeding systems and stress tolerance.
- Taxon
- Oryza perennisOryza perennist0
- Treatment
- Patterns of resource allocatione4
- Outcome
- life history characteristicse4
Not reportedDirection
Verbatim
t0“Oryza perennis Moench”
e4“Patterns of resource allocation were associated with various life history characteristics that affect breeding systems and stress tolerances”
Claim · model-written summary
Allocation patterns are the products of natural selection in different habitats.
- Taxon
- Oryza perennisOryza perennist0
- Outcome
- Allocation patternse5
- Qualifier
- products of natural selection in different habitatse5
Verbatim
t0“Oryza perennis Moench”
e5“Allocation patterns must be the products of natural selection in different habitats”
Claim · model-written summary
Such selection gave rise to genetic differentiation of Oryza perennis into forms with varying adaptive strategies.
- Taxon
- Oryza perennisOryza perennist0
- Outcome
- genetic differentiatione6
- Qualifier
- such selectione6
Verbatim
t0“Oryza perennis Moench”
e6“such selection must have given rise to genetic differentiation of this complex species into forms with varying adaptive strategies”