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Article

High-Temperature and Drought-Resilience Traits among Interspecific Chromosome Substitution Lines for Genetic Improvement of Upland Cotton

1
Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762, USA
2
USDA-ARS, Genetics and Sustainable Agriculture Research Unit, Mississippi State, MS 39762, USA
3
Department of Soil and Crop Sciences, Texas A&M AgriLife Research, College Station, TX 77843, USA
4
USDA-ARS, Genomics and Bioinformatics Research Unit, Raleigh, NC 27695, USA
*
Authors to whom correspondence should be addressed.
Plants 2020, 9(12), 1747; https://doi.org/10.3390/plants9121747
Received: 17 November 2020 / Revised: 5 December 2020 / Accepted: 7 December 2020 / Published: 10 December 2020
Upland cotton (Gossypium hirsutum L.) growth and development during the pre-and post-flowering stages are susceptible to high temperature and drought. We report the field-based characterization of multiple morpho-physiological and reproductive stress resilience traits in 11 interspecific chromosome substitution (CS) lines isogenic to each other and the inbred G. hirsutum line TM-1. Significant genetic variability was detected (p < 0.001) in multiple traits in CS lines carrying chromosomes and chromosome segments from CS-B (G. barbadense) and CS-T (G. tomentosum). Line CS-T15sh had a positive effect on photosynthesis (13%), stomatal conductance (33%), and transpiration (24%), and a canopy 6.8 °C cooler than TM-1. The average pollen germination was approximately 8% greater among the CS-B than CS-T lines. Based on the stress response index, three CS lines are identified as heat- and drought-tolerant (CS-T07, CS-B15sh, and CS-B18). The three lines demonstrated enhanced photosynthesis (14%), stomatal conductance (29%), transpiration (13%), and pollen germination (23.6%) compared to TM-1 under field conditions, i.e., traits that would expectedly enhance performance in stressful environments. The generated phenotypic data and stress-tolerance indices on novel CS lines, along with phenotypic methods, would help in developing new cultivars with improved resilience to the effects of global warming. View Full-Text
Keywords: abiotic stress tolerance; crop physiology; gas exchange; germplasm utilization; global warming; heat stress; sustainability abiotic stress tolerance; crop physiology; gas exchange; germplasm utilization; global warming; heat stress; sustainability
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MDPI and ACS Style

Reddy, K.R.; Bheemanahalli, R.; Saha, S.; Singh, K.; Lokhande, S.B.; Gajanayake, B.; Read, J.J.; Jenkins, J.N.; Raska, D.A.; Santiago, L.M.D.; Hulse-Kemp, A.M.; Vaughn, R.N.; Stelly, D.M. High-Temperature and Drought-Resilience Traits among Interspecific Chromosome Substitution Lines for Genetic Improvement of Upland Cotton. Plants 2020, 9, 1747. https://doi.org/10.3390/plants9121747

AMA Style

Reddy KR, Bheemanahalli R, Saha S, Singh K, Lokhande SB, Gajanayake B, Read JJ, Jenkins JN, Raska DA, Santiago LMD, Hulse-Kemp AM, Vaughn RN, Stelly DM. High-Temperature and Drought-Resilience Traits among Interspecific Chromosome Substitution Lines for Genetic Improvement of Upland Cotton. Plants. 2020; 9(12):1747. https://doi.org/10.3390/plants9121747

Chicago/Turabian Style

Reddy, Kambham R.; Bheemanahalli, Raju; Saha, Sukumar; Singh, Kulvir; Lokhande, Suresh B.; Gajanayake, Bandara; Read, John J.; Jenkins, Johnie N.; Raska, Dwaine A.; Santiago, Luis M.D.; Hulse-Kemp, Amanda M.; Vaughn, Robert N.; Stelly, David M. 2020. "High-Temperature and Drought-Resilience Traits among Interspecific Chromosome Substitution Lines for Genetic Improvement of Upland Cotton" Plants 9, no. 12: 1747. https://doi.org/10.3390/plants9121747

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