TITLE:
Investigating Physiological and Morphological Mechanisms of Drought Tolerance in Wheat (Triticum aestivum L.) Lines with 1RS Translocation
AUTHORS:
David Karki, William Wyant III, William A. Berzonsky, Karl D. Glover
KEYWORDS:
Wheat, Rye, Translocation, Chromosome, Water Regime
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.13,
June
19,
2014
ABSTRACT:
Rye (Secale cereale L.) chromosome translocation is reported to enhance
yield attributes in common wheat (Triticum
aestivum L.). We used 1RS translocations within the spring wheat cultivar “Pavon76”
to measure and identify the translocation that is suitable to withstand
moisture stress conditions without significant loss in yield potential. Four
lines were grown under two water regimes in greenhouse environment in 2011 and
2012. The rye translocation increased root and shoot biomass in some cases,
reduced plant height, and delayed maturity in some cases. The 1RS.1BL
translocation produced the highest grain yield associated with the lowest root
and shoot biomass under both well watered and water stressed conditions. Root
and shoot biomass were recorded the highest for 1RS.1AL under well watered
condition. However it produced the least biomass for both traits under water
stressed conditions. In most cases, lines were not statistically differentiated
for seminal root angle, abscisic acid concentration, water use efficiency, and
grain yield. Results from our study show that the 1RS.1BL translocation is more
suited to produce high grain yield under moisture limiting conditions.