G. Galiba et al., Mapping of genes involved in glutathione, carbohydrate and COR14b cold induced protein accumulation during cold hardening in wheat, EUPHYTICA, 119(1-2), 2001, pp. 173-177
Using some of the chromosome substitution lines developed from the crosses
of the donor Cheyenne to Chinese Spring we showed that the accumulation of
water soluble carbohydrates during different stages of hardening was time d
ependent. Moreover there was a significant correlation between the rate of
carbohydrate accumulation and the frost tolerance. The expression and regul
ation of a wheat gene homologous to the barley cold regulated cor14b gene w
as compared in frost sensitive and frost tolerant wheat genotypes at differ
ent temperatures. Studies made with chromosome substitution lines showed th
at the threshold induction temperature polymorphism of the cor14b wheat hom
ologous gene was controlled by loci located on chromosome 5A of wheat, whil
e cor14b gene was mapped, in Triticum monococcum, onto the long arm of chro
mosome 2A(m). Our study on the effect of cold hardening on glutathione (GSH
) metabolism showed that chromosome 5A of wheat has an influence on the GSH
accumulation and on the ratio of reduced and oxidised glutathione as part
of a complex regulatory function during cold hardening. In addition, the le
vel of increase in GSH content during hardening may indicate the degree of
the frost tolerance of wheat.