关键词: 小麦, 小黑麦, 小麦条锈病, 易位系, 染色体

Abstract: Because of  excellent genetic diversity,rye is one of the important parents to improve wheat quality, yield and resistance, and  enrich wheat germplasm resources. This study carried out stripe rust resistance identification, agronomic traits analysis, cellular molecular genetics identification and relevant quality analysis on 16 hybrid lines between common wheat (Triticum aestivum L.) and triticale (Triticale wittmack) on the basis of distant hybridization. Besides, foreign chromosomes (fragments), which might be led into common wheat were positioned from multiaspect. Results revealed that 9 wheat×triticale 1BL/1RS translocation lines, one substitution line and 2 1BL/1RS translocation lines/substitution line were identified. Results of disease identification indicated that these 9 hybrid lines presented high resistance to stripe rust in seedling and adult stages, which could provide resistant resources for wheat stripe rust resistant breeding. In addition, the common HMW-glutenin subunit types, such as Null, 7+8, and 2+12 had the highest frequency of occurrence among the 16 lines shown in analysis of HMWG subunits composition. Among them, P174 line got the highest comprehensive score, meeting the standard of first-grade wheat flour. Finally, the field agronomic and quality traits analysis showed that the bulk density of 12 wheat lines attained the standard of first-grade wheat seeds, their lysine content ranged from 2.8~4.4 g/kg. A number of intermediate material with superior resistance in fields and good value would be identified according to these results, and new germplasm resources would be provided for wheat stripe rust breeding.

Key words: wheat, triticale, stripe rust, translocation, chromosome