Abstract
Anatomical and chemical characteristics of stems affect lodging in wheat (Triticum aestivum L.) cultivars. Traits associated with lodging resistance, such as plant height, stem strength, culm wall thickness, pith diameter, and stem diameter, were extensively investigated in earlier studies. However, the solid stem trait was rarely considered. In this study, we measured a range of anatomical and chemical characteristics on solid and hollow stemmed wheat cultivars. Significant correlations were detected between resistance to lodging and several anatomical features, including width of mechanical tissue, weight of low internodes, and width of stem walls. Morphological features that gave the best indication of improved lodging resistance were increased stem width, width of mechanical tissue layer, and stem density. Multiple linear regression analysis showed that 99% of the variation in lodging resistance could be explained by the width of the mechanical tissue layer, suggesting that solid stemmed wheat has several anatomical features for increasing resistance to lodging. In addition, microsatellite markers GWM247 and GWM340 were linked to a single solid stem QTL on chromosome 3BL in a population derived from the cross Xinongshixin (solid stem)/Line 3159 (hollow stem). These markers should be valuable in breeding wheat for solid stem.
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Claims 7
Claim · model-written summary
Mechanical tissue width correlated significantly with lodging resistance.
Not reportedTaxonDirection
Verbatim
e0“Significant correlations were detected between resistance to lodging and several anatomical features, including width of mechanical tissue”
Claim · model-written summary
Low internode weight correlated significantly with lodging resistance.
Not reportedTaxonDirection
Verbatim
e0“Significant correlations were detected between resistance to lodging and several anatomical features, including width of mechanical tissue, weight of low internodes”
Claim · model-written summary
Stem wall width correlated significantly with lodging resistance.
Not reportedTaxonDirection
Verbatim
e0“Significant correlations were detected between resistance to lodging and several anatomical features, including width of mechanical tissue, weight of low internodes, and width of stem walls”
Claim · model-written summary
Increased stem width, mechanical tissue layer width, and stem density best indicated improved lodging resistance.
- Organ / stage
- stem widthe0
- Outcome
- stem width, width of mechanical tissue layer, and stem densitye0
- Direction
- increasede0
- Qualifier
- increased stem widthe0
Not reportedTaxon
Verbatim
e0“increased stem width, width of mechanical tissue layer, and stem density”
Claim · model-written summary
Mechanical tissue layer width explained 99% of variation in lodging resistance.
- Organ / stage
- width of the mechanical tissue layere0
- Outcome
- variation in lodging resistancee0
- Value
- 99%e0
Not reportedTaxonDirection
Verbatim
e0“99% of the variation in lodging resistance could be explained by the width of the mechanical tissue layer”
Claim · model-written summary
GWM247 and GWM340 were linked to a solid-stem QTL on chromosome 3BL.
Not reportedTaxon
Verbatim
e0“microsatellite markers GWM247 and GWM340 were linked to a single solid stem QTL on chromosome 3BL”
Claim · model-written summary
The linked markers were recommended for breeding solid-stem wheat.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- breeding wheat for solid steme0
- Qualifier
- These markerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These markers should be valuable in breeding wheat for solid stem”