摘要
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与6E染色体携有耐低磷营养胁迫的基因，且其效应远远超过背景亲本中国春。（2）强烈抑制耐低磷胁迫特性的基因位于5E染色体。（3）2E和3E染色体的附加系与代换系耐低磷特性的表现不一致。尽管2E和3E的附加系对低磷营养胁迫极为敏感，但无论在对照或低磷胁迫条件下，其相应的异代换系却显著优于其附加系和中国春。此外，对附加系和代换系表现不一致的原因进行了讨论。
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.
基金
国家自然科学基金
关键词
长穗偃麦草
低磷营养胁迫
基因
染色定位
Lophyopyrum elongatum, Alien disomic addition lines, Alien disomic substitution lines, Tolerance to phosphorus deficiency, Gene
