Bài viết này trình bày kết quả nghiên cứu xác định hàm lượng amylose và nhiệt độ hóa hồ của 200 mẫu nguồn gen được lựa chọn từ tập đoàn ngô địa phương. Kết quả cho thấy có sự đa dạng rất lớn về hàm lượng amylose cũng như là nhiệt độ hóa hồ 200 mẫu nguồn gen đánh giá. | Tạp chí Khoa học và Công nghệ Nông nghiệp Việt Nam - Số 11 120 2020 Zheng K. N. Huang J. Bennett and . Khush Zhu D. Kang H. Li Z. Liu M. Zhu X. Wang Y. 1995. PCR-Based Marker-Assisted Selection in et al. A genome wide association study of field Rice Breeding. IRRI Discussion Paper Series No. 12 resistance to Magnaporthe oryzae in rice. Rice. 2016 International Rice Research Institute Manila. 9 44. https s12284-016-0116- 3PMID 27576685. Creating materials for rice blast resistance breeding Pham Thien Thanh Tang Thi Diep Tong Thi Huyen Do Thi Huong Le Thi Thanh Nguyen Tri Hoan Duong Xuan Tu Abstract The rice blast disease caused by Pyricularia oryzae is one of the most serious diseases in Vietnam. However this disease can be managed by using resistant rice varieties. Research on breeding sustainable rice varieties with resistance genes has always been considered as effective inexpensive and environmentally friendly. The diversity of genetic materials in combination with molecular markers closely linked to resistance genes is an effective tool in supporting the rice breeding of blast resistance. In this study we used 12 popular blast fungus strains in the Northern provinces to assess resistance for near isogenic lines. The results identified genes Pi1 Pi7 t Pi9 Pik Pik-h Pik-m Pik-p Pish Pita Pita-2 and Piz-5 exhibiting effective resistance. A total of 16 markers used for polymorphic assessment between cultivars carrying these resistance genes and cultivated varieties five SSR markers for differentiating polymorphisms could be used as a support tool for breeding RM527 RM206 RM224 RM1337 RM7102 . These resistance genes were transferred to BC15 rice variety to create five promising lines and carrying the corresponding resistance genes Pita Pita2 Pik -h Piz5 and Pi1. The elite lines have precious agronomic characteristics such as high yielding - tons ha good quality amylose content from and resistance to .
