Abstract
Maize hybrids which produce more leaves above the ear, with leaf area indices similar to conventional hybrids, which require fewer corn heat units to flowering and maturity, and tolerate higher population densities, should be better adapted for production in short season areas than currently available hybrids. Leafy reduced‐stature maize hybrids, which have only recently been developed, have traits which address these criteria. The objective of this study was to evaluate the effects of different population densities (50 000, 100 000, 150 000, and 200 000 plants.ha −1 ) on the vegetative growth of one leafy reduced‐stature (LRS), one non‐leafy reduced‐stature (NLRS), and two conventional control hybrids (Pioneer 3979, < 2500 CHU, and Pioneer 3902, 2600–2700 CHU) at two locations. There were no differences among population densities for leaf number above the ear; however leaf area index increased as population density increased for all hybrids. The LRS hybrid had a greater average leaf number above the ear (2.7 and 2.0 more leaves than NLRS and the control hybrids, respectively). As a result the leaf area index value of LRS was much greater than the NLRS and similar to the conventional hybrids, but LRS matured substantially before the conventional hybrids. The LRS hybrid required fewer corn heat units to reach flowering and maturity and had more time for grain filling than the conventional hybrids. Therefore, LRS hybrids show promise for production in short season areas where maize cultivation is not economical due to shortness of growing season.
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Claims 9
Claim · model-written summary
Population density did not change leaf number above the ear
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e1“There were no differences among population densities for leaf number above the ear”
Claim · model-written summary
Leaf area index increased with population density for all hybrids
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e2“however leaf area index increased as population density increased for all hybrids”
Claim · model-written summary
The leafy reduced-stature hybrid had 2.7 and 2.0 more leaves above the ear than the NLRS and control hybrids
- Treatment
- LRS hybride3
- Outcome
- average leaf number above the eare3
- Direction
- greatere3
- Value
- 2.7 and 2.0 more leavese3
- Comparator
- NLRS and the control hybridse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e3“The LRS hybrid had a greater average leaf number above the ear (2.7 and 2.0 more leaves than NLRS and the control hybrids, respectively)”
Claim · model-written summary
Leaf area index of the leafy reduced-stature hybrid was much greater than that of the NLRS hybrid
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e4“As a result the leaf area index value of LRS was much greater than the NLRS and similar to the conventional hybrids”
Claim · model-written summary
Leaf area index of the leafy reduced-stature hybrid was similar to conventional hybrids
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e4“As a result the leaf area index value of LRS was much greater than the NLRS and similar to the conventional hybrids”
Claim · model-written summary
Leafy reduced-stature hybrid matured substantially before conventional hybrids
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e5“but LRS matured substantially before the conventional hybrids”
Claim · model-written summary
Leafy reduced-stature hybrid required fewer corn heat units to flowering and maturity
- Treatment
- LRSe6
- Outcome
- corn heat units to reach flowering and maturitye6
- Direction
- fewere6
- Comparator
- conventional hybridse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e6“The LRS hybrid required fewer corn heat units to reach flowering and maturity and had more time for grain filling than the conventional hybrids”
Claim · model-written summary
Leafy reduced-stature hybrid had more time for grain filling than conventional hybrids
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e6“The LRS hybrid required fewer corn heat units to reach flowering and maturity and had more time for grain filling than the conventional hybrids”
Claim · model-written summary
Leafy reduced-stature hybrids show promise for production in short-season areas
- Outcome
- production in short season arease7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maize hybrids which produce more leaves above the ear”
e7“LRS hybrids show promise for production in short season areas”