Chromosome regions and stress-related sequences involved in resistance to abiotic stress in Triticeae.
Drought, low temperature and salinity are the most important abiotic stress factors limiting crop productivity. A genomic map of major loci and QTLs affecting stress tolerance in Triticeae identified the crucial role of the group 5 chromosomes, where the highest concentration of QTLs and major loci controlling plant's adaptation to the environment (heading date, frost and salt tolerance) has been found. In addition, a conserved region with a major role in drought tolerance has been localized to the group 7 chromosomes. Extensive molecular biological studies have led to the cloning of many stress-related genes and responsive elements. The expression of some stress-related genes was shown to be linked to stress-tolerant QTLs, suggesting that these genes may represent the molecular basis of stress tolerance. The development of suitable genetic tools will allow the role of stress-related sequences and their relationship with stress-tolerant loci to be established in the near future.
Cattivell
Luigi
L
Istituto Sperimentale per la Cerealicoltura, Fiorenzuola d'Arda, PC, Italy. l.cattivelli@iol.it
Baldi
Paolo
P
Crosatti
Cristina
C
Di Fonzo
Natale
N
Faccioli
Primetta
P
Grossi
Maria
M
Mastrangelo
Anna M
AM
Pecchioni
Nicola
N
Stanca
A Michele
AM
D000222:Adaptation, Physiological / Q000235:genetics*; D002874:Chromosome Mapping; D018744:DNA, Plant / Q000235:genetics; D017343:Genes, Plant / Q000235:genetics; D018745:Genome, Plant; D006109:Poaceae / Q000235:genetics*; D019655:Quantitative Trait, Heritable
D018744:DNA, Plant