Abstract
Maize (Zea mays L.) is an excellent feed, whether fresh, chopped, or ensiled. Silage maize hybrids have been developed for temperate-cold regions of Europe and North America, but limited research has been done to develop silage hybrids for temperate and warm-temperate regions. This study was conducted to identify inbred lines that could be used to enhance the stover and ear fractions of existing hybrids for warm-temperate areas. Forty-five single-cross hybrids were developed from 10 inbred lines and evaluated in six environments. Ten inbred lines were evaluated for potential to improve the best hybrids by Dudley's and Metz's methodologies. Hybrids differed significantly (P < 0.01) for ear (EY), stover (SY), and whole-plant dry matter yield (WY), in vitro digestibility of whole-plant dry matter (iDW), and whole-plant digestible dry matter yield (WDY), differences among hybrids were not significant for in vitro digestibility of ear (iDE) and stover (iDS). Four outstanding hybrids were selected as target hybrids for improvement on the basis of YSi (Kang's Yield-Stability Statistic) of mean WDY and their stability across environments. Inbred lines that were able to increase SY were not the same ones that would increase EY. Inbred PR4 had outstanding potential to improve the SY of any hybrid. Inbred B84 had greatest potential to enhance EY. Inbred lines showed differential capacity to generate improvement according to the fractions that were evaluated. Finally, inbred lines from the North American Corn Belt did not demonstrate potential for enhancing SY when they were compared with local flint inbred lines.
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Claims 7
Claim · model-written summary
Hybrids differed significantly in ear, stover, and whole-plant dry matter yields, whole-plant digestibility, and digestible dry matter yield.
- Outcome
- ear (EY), stover (SY), and whole-plant dry matter yield (WY)e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrids differed significantly (P < 0.01) for ear (EY), stover (SY), and whole-plant dry matter yield (WY), in vitro digestibility of whole-plant dry matter (iDW), and whole-plant digestible dry matter yield (WDY)”
t0“Maize”
Claim · model-written summary
Hybrids did not differ significantly in ear or stover digestibility.
- Outcome
- in vitro digestibility of ear (iDE) and stover (iDS)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“differences among hybrids were not significant for in vitro digestibility of ear (iDE) and stover (iDS)”
t0“Maize”
Claim · model-written summary
Four hybrids were selected for improvement on yield-stability and stability across environments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four outstanding hybrids were selected as target hybrids for improvement on the basis of YSi (Kang's Yield-Stability Statistic) of mean WDY and their stability across environments”
t0“Maize”
Claim · model-written summary
Inbred lines that could increase stover yield differed from those that could increase ear yield.
- Outcome
- increase SYe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inbred lines that were able to increase SY were not the same ones that would increase EY”
t0“Maize”
Claim · model-written summary
PR4 had outstanding potential to improve hybrid stover yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inbred PR4 had outstanding potential to improve the SY of any hybrid”
t0“Maize”
Claim · model-written summary
B84 had the greatest potential to enhance ear yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inbred B84 had greatest potential to enhance EY”
t0“Maize”
Claim · model-written summary
North American Corn Belt inbreds showed no potential to enhance stover yield relative to local flint inbreds.
- Material
- inbred lines from the North American Corn Belte0
- Outcome
- SYe0
- Direction
- did not demonstrate potential for enhancinge0
- Comparator
- local flint inbred linese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inbred lines from the North American Corn Belt did not demonstrate potential for enhancing SY when they were compared with local flint inbred lines”
t0“Maize”