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Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (28): 255-263.doi: 10.11924/j.issn.1000-6850.2014-1143

Special Issue: 小麦

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Genetic Diversity and Stripe Rust Resistance of Wheat Regional Trial Cultivars in Hebei, Shandong, Henan and Sichuan in 2007-2008

  

  • Received:2014-04-19 Revised:2014-04-19 Accepted:2014-05-19 Online:2014-10-15 Published:2014-10-15

Abstract: In order to investigate the genetic diversity and resistance to wheat stripe rust of the regional trial wheat cultivars in Hebei, Shandong, Henan and Sichuan in 2007-2008, the pedigree information of 75 regional cultivars was traced and the coefficient of parentage (COP) between the parents and cross combinations was calculated. The cluster analysis was conducted based on the COP value. 75 regional cultivars were inoculated with mixed races of Puccinia striiformis. Among 284 of the 2775 combinations, the range of COP value of all cultivars was 0.0000 to 0.5000 and the sum of COP value was 216.4531; cluster analysis suggested that 75 cultivars could be divided into 10 groups. Yumai 2 and its derived varieties were mainly used as parents in most of regional trial cultivars, which maybe the main reason of the highest similarity in Henan cultivars. While local and other districts resources were mainly used in Sichuan, the similarity was the lowest and the level of stripe rust resistance was the highest, relatively. So it is important to enhance the utilization of novel wheat with distant relationship. It can improve the genetic diversity of wheat cultivars and create more excellent germplasm.