Abstract:

In 183 registered wheat cultivars of Henan Province, 75 cultivars have consanquinity of Yumai 2. Yumai 2 is the most widely utilized corner stone parent in wheat breeding of Henan Province. The coancestry coefficient of Yumai 2 with its 75 derived cultivars were analyzed.The results showed that coancestry coefficient of the 75 wheat cultivars with Yumai 2 varied from 0.0500 to 0.6250.The total coancestry coefficient was 20.9401, which accounted for 27.87% in 75 wheat cultivars and 11.42% in 183 registered wheat cultivars of Henan province.Yumai 2 had very high value in use, and this would continue in coming years. The study of the breeding value of Yumai 2 was of great significance for utilizing wheat germplasm effectively, maintaining the genetic diversity of wheat lines, selecting the hybrid parents properly, and succeeding in breeding a good new genotype.