Based on molecular diagnosis of heading date related genes, molecular diagnostics carried out molecular design of key gene combinations at heading date. The target allele carrying materials of key genes at heading date were used as donor parents, and Japanese super quality varieties were used as recurrent parents. Or through the establishment of a genetic population to locate the key genes related to heading date, through molecular marker assisted continuous backcross with Japanese super high quality parents as recurrent parents, to create new materials with the genetic background of Japanese super high quality varieties and the recombination of key genes related to heading date, so as to delay the heading date of new materials and greatly improve the yield.<br>
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