Breeding techniques of C-Liangyou266-a new two-line late hybrid rice combination and discussion on rice radiation breeding

C Liangyou 266 is a new two-line hybrid rice combination bred by radiation and hybrid technology, the combination has the following characteristics: higher output (higher yield than high-yielding control variety Tianyou hua zhan), multi-resistance (lodging-resistance, anti-disease), low temperature resistance, good grain quality (three indicators of the national standard one, three indicators of GB 2); moderately good shape distribution plant type, stem stiff, late Lase green show, medium ear and ear grain structure is reasonable; moderate growth, wide adaptability and other characteristics. May 2013 approved through the national crops variety examination and approval committee. Radiation mutation breeding and cross breeding technology, its breeding effect was better. We had a combination of radiation and hybrid experiments, than the various types of variation and mutation frequency of a single processing complex processing have increased, the better.Province bred by radiation mutagenesis and direct and indirect through the provincial approval or have successfully transferred 30 varieties, including through a combination of radiation and hybrid varieties bred was 23, 76.7% of the total radiation bred varieties, indicating radiation and the hybrid combination produces better breeding results. (authors)