普通小麦基因组中耐低磷胁迫特性的染色体控制

以普通小麦中国春的一套缺四体为材料，对其耐低磷胁迫特性进行鉴定和遗传分析。结果表明：（１）第１，４，７部分同源群与低磷胁迫特性关系最密切，且第１，７部分同源群内各染色体间在该性状的遗传互补性良好。第４部分同源群则不同，４Ａ可以有效补偿４Ｂ与４Ｄ的缺失，反之则不能。（２）第２，３，５６部分同源群与低磷胁迫特性关系不密切，且这些同源群内某一染以体的缺失大多不能被其他染色体有效地补偿，尤其是第３与第６部

Chromosomal Control of the Tolerance to Phosphorus Deficiency in Genome of Triticum aestivum Chinese Spring

By using a set of nulli-tetrasomics derived from Triticum aestivum "ChineseSpring", identification and genetic analysis were conducted on the tolerance to soilReveived February, 1998, revision received September 1, 1998The project supported by National Natural Science Foundationphosphorus deficiency stress. The results indicated that homoeologous groups 1,4, and7 were closely related to the tolerance to phosphorus deficiency sbess, and there wereefficiently genetic complementations among chromosomes in each homoeologous group1 or 7 in this character. Although the lose of chromosome 4B or 4D could becomplemented by chromosome 4A, otherwise not the case. Unlike homoeologousgroups 1 and 7, no close relationship beteween groups 2, 3, 5, 6 and the tolerance tothe stress was found, and the chromosomes in each of these groups could not begenetically complemented, especially for chromosomes groups 3 and 6. The genesconferring the tolerane to the stress were located on chromosomes 1A, 4A, 7A, 3B,5B and 7D particulary on 1A, 4A and 7A. In contrast chromosomes 1B, 4B, 7B,3A and 6D could carry the genes repressing mis character Therefore, chromosomescarrying the tolerance genes should be preserved, and these carrying the repressinggenes targetly substituted when improving the tolerance to the stress throughdeveloping new alien substitution lines via chromosome engineering.