The corner stone parents of 170 registered (recognized) wheat cultivars are analyzed in this paper. It is shown that the corner stone parents of the 58 registered cultivars and the 9 recognized cultivars before year of 2000 belong to Fan 6 and Mianyang No.11 series, respectively; 33 registered cultivars belong to Fan 6 and its total coefficient parentage is 9.25, which accounts for 49.28%; 21 registered cultivars belong to Mianyang No.11 series and the total coefficient parentage is 8.45, which accounts for 31.35%. Years 2001—2013 were a golden period of wheat breeding industry in Sichuan Province, with total 112 registered cultivars for new varieties of wheat, which overcame the weakness of using a single and narrow germplasm resource before 2000. More than 5 registered cultivars of the backbone parents were bred, including Mianyang 26, Guinong 21 and 92R system materials. They accounted for 10.7% , 9.8% , 6.3% of the 112 registered cultivars in this period. In addition, breeders created a batch of new germplasm resources: synthetic cultivar Chuanmai 42, SW system germplasm resources, R system germplasm resources, which started a new round of multiple backbone parent series.

Sichuan  /  wheat  /  registered (recognize) cultivar  /  corner stone parents  /  coefficient of parentage  /  germplasm resources