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- Title
Morph-physiological responses of cotton interspecific chromosome substitution lines to low temperature and drought stresses.
- Authors
Awasthi, Akanksha; Reddy, K. Raja; Saha, Sukumar; Jenkins, Johnie N.; Stelly, David M.
- Abstract
Limited knowledge about genetic and physiological traits associated with drought and low temperature stresses and narrow genetic diversity in Upland cotton (Gossypium hirsutum L.) are serious impediments in its genetic improvement. The objectives of this research were to determine the genetic and physiological traits associated with drought and low temperature effects and to identify chromosomal effects on these traits using chromosome substitution (CS) lines from three alien species of Gossypium, G. barbadense, G. tomentosum, and G. mustelinum, respectively. Two experiments were conducted to study low temperature and drought stress effects during seedling emergence and early growth stages in 21 cotton CS-lines with parent, Texas Marker (TM)-1. In Experiment I, plants were grown at optimum (30/22 °C) and low (22/14 °C) temperature conditions under optimum water and nutrient conditions. In Experiment II, plants were grown at optimum water (soil moisture content of 0.167 m3 m−3) and in drought (soil moisture content 0.105 m3 m−3) conditions under optimum temperature conditions. Above- and below-ground growth traits including several root traits of the CS lines were assessed at 25 days after sowing. The findings suggest which substituted chromosome or chromosome segment from the alien species likely harbors one or more genes for higher and lower tolerance to low temperature, respectively. CS-T04 and CSB08sh showed higher and lower tolerance to low temperature, respectively and CS-T04 and CS-B22sh showed higher and lower tolerance, respectively, to drought. CS lines are valuable analytical tool and useful genetic resources for targeted exploitation of beneficial genes for drought and low temperature stresses in Upland cotton.
- Subjects
COTTON; INTRODUCED species; EFFECT of drought on plants; SOIL moisture; SOIL temperature
- Publication
Euphytica, 2018, Vol 214, Issue 11, p1
- ISSN
0014-2336
- Publication type
Article
- DOI
10.1007/s10681-018-2300-6