Abstract
In this study,45 maize inbred lines were employed to study the interrelationship among traits of seedling emergence rate, root number, root length, mesocotyl length, coleoptile length, mesocotyl and coleoptile total length,seedling length, and deep-sowing tolerant characteristics at 10 cm and 15 cm sowing depth.The results showed that root length,mesocotyl length, coleoptile length, mesocotyl and coleoptile total length increased, and seedling emergence rate, root number,seedling length decreased with sowing depth.And there were different variable coefficient of the traits at different sowing depth, with seedling emergence rate and coleoptile length showing largest variations whereas root length, root number and mesocotyl length being the least.Correlation analysis showed that seedling emergence rate at 10cm sowing depthwas significantly positively correlated with coleoptile length,rootlength and seedling length.Seedling emergence rate at 15 cm sowing depth was positively correlated with mesocotyl length, mesocotyl and coleoptile total length, root number, root length, seedling length. The findings for the 15 cm sowing depth could reflect deep-sowing tolerant ability in different maize lines. Therefore, according to strong or weak deep-sowing tolerant ability, 45 maize lines were categorized into three groups, using parameters including seedling emergence rate, root number, root length,mesocotyl length,mesocotyl and coleoptile total length and seedling length at the 15 cm sowing depth.Further, these 45 inbred lines could be classified into six sub-groups(Lancaster,Sipingtou, PA, PB, BSSS and Luda Red Cob),which agreed with the recorded pedigree. Marked differences were observed for mean seedling emergence rate, root number,root length,mesocotyl length,mesocotyl and coleoptile total length and seedling length among the six sub-groups at the 15 cm sowing depth.Analysis showed that the values for Lancaster,Sipingtou and PA were relatively higher, exhibiting strong to medium deep-sowing tolerant, and are elite germplasms for improvement of deep-sowing tolerant maize.
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Claims 12
Claim · model-written summary
Root length, mesocotyl length, coleoptile length and their combined length increased with sowing depth.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“root length,mesocotyl length, coleoptile length, mesocotyl and coleoptile total length increased, and seedling emergence rate, root number,seedling length decreased with sowing depth”
Claim · model-written summary
Seedling emergence rate, root number and seedling length decreased with sowing depth.
- Outcome
- seedling emergence rate, root number,seedling lengthe0
- Direction
- decreasede0
- Setting
- sowing depthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“seedling emergence rate, root number,seedling length decreased with sowing depth”
Claim · model-written summary
Variation across sowing depths was greatest for seedling emergence rate and coleoptile length.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“seedling emergence rate and coleoptile length showing largest variations”
Claim · model-written summary
Variation across sowing depths was least for root length, root number and mesocotyl length.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“root length, root number and mesocotyl length being the least”
Claim · model-written summary
At 10 cm, seedling emergence rate correlated positively with coleoptile, root and seedling length.
- Organ / stage
- coleoptilee0
- Outcome
- seedling emergence ratee0
- Direction
- positively correlatede0
- Setting
- 10cm sowing depthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“seedling emergence rate at 10cm sowing depthwas significantly positively correlated with coleoptile length,rootlength and seedling length”
Claim · model-written summary
At 15 cm, seedling emergence rate correlated positively with mesocotyl length, combined mesocotyl and coleoptile length, root number, root length and seedling length.
- Organ / stage
- mesocotyle0
- Outcome
- Seedling emergence ratee0
- Direction
- positively correlatede0
- Setting
- 15 cm sowing depthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“Seedling emergence rate at 15 cm sowing depth was positively correlated with mesocotyl length, mesocotyl and coleoptile total length, root number, root length, seedling length”
Claim · model-written summary
Traits at 15 cm reflected deep-sowing tolerance among maize lines.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“The findings for the 15 cm sowing depth could reflect deep-sowing tolerant ability in different maize lines”
Claim · model-written summary
The 45 maize lines were categorized into three tolerance groups.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“45 maize lines were categorized into three groups”
Claim · model-written summary
The 45 lines formed six pedigree-consistent subgroups.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“45 inbred lines could be classified into six sub-groups(Lancaster,Sipingtou, PA, PB, BSSS and Luda Red Cob),which agreed with the recorded pedigree”
Claim · model-written summary
Seedling emergence, root and mesocotyl traits differed markedly across the six subgroups at 15 cm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“Marked differences were observed for mean seedling emergence rate, root number,root length,mesocotyl length,mesocotyl and coleoptile total length and seedling length among the six sub-groups at the 15 cm sowing depth”
Claim · model-written summary
Lancaster, Sipingtou and PA had relatively higher trait values and strong to medium deep-sowing tolerance.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“the values for Lancaster,Sipingtou and PA were relatively higher, exhibiting strong to medium deep-sowing tolerant”
Claim · model-written summary
Lancaster, Sipingtou and PA are identified as elite germplasm for deep-sowing tolerance improvement.
- Material
- Lancaster,Sipingtou and PAe0
- Outcome
- elite germplasms for improvement of deep-sowing tolerant maizee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize inbred lines”
e0“Lancaster,Sipingtou and PA were relatively higher, exhibiting strong to medium deep-sowing tolerant, and are elite germplasms for improvement of deep-sowing tolerant maize”