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[Chromosomal location of the genes conferring the tolerance to phosphorus deficiency stress in Lophopyrum elongatum genome] [In Process Citation]

Identification and genetic analysis were conducted on the tolerance to phosphorus deficiency stress by using a set of alien disomic addition lines (DA lines) and disomic substitution lines (DS lines) of common wheat Chinese Spring-Lophopyrum elongatum (2n = 2x = 14, EE), a closely related wheat species. The results indicated that chromosomes 4E and 6E in L. elongatum may carry the genes conferring the tolerance to phosphorus deficiency stress with much stronger effect over the background parent Chinese Spring. DA lines derived from chromosomes 2E and 3E behaved quite different from the corresponding DS lines. Although DA2E and DA3E were susceptible to phosphorus deficiency, the DS lines performed much better than Chinese Spring, DA2E and DA3E under both control and the deficiency conditions. However, the strongly repressed stress tolerance was located on chromosome 5E. In addition, the possible reasons for the different reponses to phosphorus deficiency between DA and DS lines of chromosomes 2E and 3E are discussed.