abstract |
The invention provides a method for creating weakly photosensitive japonica rice germplasm, comprising the following steps: (1) selecting a japonica rice line 1 with a genotype of hd1+ehd1+sdg725 at heading stage and a japonica rice line 2 with a genotype of Hd1+Ehd1+SDG725 (2) Consecutive selfing after hybridization, using single seed transmission method to obtain recombinant inbred line population; (3) Using molecular marker technology to screen homozygous families with different genotype combinations, select long-day and short-day conditions for sowing For families with a small variation in the full period (days from sowing to full heading) and with the potential to increase yield, new japonica rice genotypes hd1+ehd1+sdg725 (late-maturing line) or hd1+ehd1+SDG725 (early-maturing line) at heading stage were obtained strain. The weakly photosensitive japonica rice line cultivated by the invention can improve the planting adaptability in the southern rice area, and can selectively meet the complicated stubble demand in different promotion areas. In addition, it is helpful for phenotypic selection of important agronomic traits in shuttle breeding and high-throughput genotyping of target genes Ehd1 and SDG725 to improve breeding efficiency. |