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Stay green trait in grain sorghum: relationship between visual rating and leaf chlorophyll concentration
Abstract
Post‐flowering drought tolerance is referred to as the stay green trait in sorghum. Plants with stay green resist drought‐induced premature plant senescence. In breeding programmes, stay green is evaluated under limited irrigation, post‐flowering moisture‐stress field conditions and visually scored at or soon after physiological grain maturity. The objective of this study was to investigate the relationship between the stay green rating and total leaf chlorophyll content. The parents B35 and Tx7000, and their 98 F, recombinant inbred lines were evaluated in replicated field trials under limited (post‐flowering stress) and full‐irrigation (non‐stress) conditions. After scoring the stay green trait of stressed plants, total leaf chlorophyll contents were measured with a chlorophyll meter (SPAD values) and a spectrophotometer method. The SPAD value had a significant linear relationship with total leaf chlorophyll (R 2= 0.91) and with visual stay green rating (with R 2= 0.82). Relative water content in top leaves of the stay green lines was about 81%, much higher than non‐stay green lines (38%), indicating that the stay green lines kept the stalk transporting system functioning under severe drought conditions, The results indicate that visual stay green ratings were a reliable indicator of leaf senescence an should be useful to sorghum breeders in evaluating progeny when breeding for drought tolerance.
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Cited by
Uddling, J., Gelang-Alfredsson, J., Piikki, K., & Pleijel, H. (2007) · Photosynthesis Research · doi:10.1007/s11120-006-9077-5 · Cited by 885
Shovelomics: high throughput phenotyping of maize (Zea mays L.) root architecture in the field
Trachsel, S., Kaeppler, S. M., Brown, K. M., & Lynch, J. P. (2011) · Plant and Soil · doi:10.1007/s11104-010-0623-8 · Cited by 731
Xiong, D., Chen, J., Yu, T., Gao, W., Ling, X., Li, Y., Peng, S., & Huang, J. (2015) · Scientific Reports · doi:10.1038/srep13389 · Cited by 411
In situ measurement of leaf chlorophyll concentration: analysis of the optical/absolute relationship
PARRY, C., BLONQUIST, J. M., & BUGBEE, B. (2014) · Plant, Cell & Environment · doi:10.1111/pce.12324 · Cited by 274
Metadata
- Authors
- Xu, W., Rosenow, D. T., & Nguyen, H. T.
- Venue
- Plant Breeding
- Publisher
- Wiley
- Published
- 2000-08
- Volume
- 119
- Issue
- 4
- Pages
- 365-367
- ISSN
- 0179-9541 (ISSN-L)
- 1439-0523
- OpenAlex
- W2034746583
- Cited by
- 173
- References
- 0
- FWCI
- 2.72
- Type
- journal article
- Language
- en
- Open access
- closed
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- Xu, W., Rosenow, D. T., & Nguyen, H. T. (2000). Stay green trait in grain sorghum: relationship between visual rating and leaf chlorophyll concentration. Plant Breeding. https://doi.org/10.1046/j.1439-0523.2000.00506.x
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