Abstract
Two phenotypically dissimilar open pollinated sunflower ( Helianthus annuus L.) cultivars, ‘Peredovik’ and ‘Tchernianka’, and two hybrids, ‘Romsun 52’ and ‘Seedtec 304’ (produced by genetic and cytoplasmic male sterile systems, respectively), were sown at different dates and seeding rates for two years. The four cultivars were planted as a 4 × 4 latin square. Within each of the four replications, dates of sowing were randomly assigned to strips across the four cultivars. Within each cultivar‐sowing date combination, plant spacings were randomly assigned as 6‐row subplots. Data were collected from ten plants per plot for a number of morphological characters and from the plants in the two center rows for yield and oil characters. Principal component and path coefficient analyses indicate that even though these cultivars are phenotypically and genetically different, the response to date of planting, and the biological systems controlling the interrelationships between morphological, yield, and oil characters are similar. This may explain why some sunflower cultivars are superior at a wide range of locations, and at the same time are sensitive to environmental changes such as planting dates. The results also suggest that yield improvement through better management should apply to many types of cultivars in a wide range of environments.
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Claims 3
Claim · model-written summary
Distinct sunflower cultivars had similar responses to planting date.
- Taxon
- sunflower
Helianthus annuust0 - Outcome
- response to date of plantinge0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“even though these cultivars are phenotypically and genetically different, the response to date of planting, and the biological systems controlling the interrelationships between morphological, yield, and oil characters are similar”
t0“Sunflower”
Claim · model-written summary
The cultivars showed similar relationships among morphology, yield and oil traits.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- interrelationships between morphological, yield, and oil characterse0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the biological systems controlling the interrelationships between morphological, yield, and oil characters are similar”
t0“Sunflower”
Claim · model-written summary
The authors suggest yield improvement by better management could apply across cultivar types and environments.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- yield improvement through better managemente0
- Qualifier
- many types of cultivars in a wide range of environmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield improvement through better management should apply to many types of cultivars in a wide range of environments”
t0“Sunflower”