长穗偃麦草基因组中与耐低磷营养胁迫有关的基因的染色体定位

以中国春－长穗偃麦草二体异附加系和二体异代换系为材料，对其耐低磷营养胁迫特性进行鉴定和遗传分析，结果表明（１）长穗偃麦草的４Ｅ一＾ 色体携有耐低营养胁迫的基因，且其效应远远超过背景亲本中国春。

Chromosomal Location of the Genes Conferring the Tolerance to Phosphorus Deficiency Stress in Lophopyrum elongatum Genome

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-Lophoyrum 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 localed 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.