Biotechnology Bulletin ›› 2022, Vol. 38 ›› Issue (10): 132-139.doi: 10.13560/j.cnki.biotech.bull.1985.2021-1493

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Effects of Blend Seeding on the Yield,Purity and Yield Advantage of F1 in Three-line Hybrid Wheat

KONG De-zhen(), NIE Ying-bin(), XU Hong-jun, CUI Feng-juan, MU Pei-yuan, TIAN Xiao-ming()   

  1. Institute of Crop Research,Xinjiang Academy of Agri-Reclamation Sciences/Key Lab of Xinjiang Production and Construction Corps for Cereal Quality Research and Genetic Improvement,Shihezi 832000
  • Received:2021-12-02 Online:2022-10-26 Published:2022-11-11
  • Contact: NIE Ying-bin,TIAN Xiao-ming E-mail:kongdezhen1746@163.com;nieyingbin@126.com;txming729@163.com

Abstract:

In order to explore the effects of different ratios of restoring lines on seed production,purity and heterosis of F1 yield in hybrid wheat production with strong heterosis combinations,three AL(Alborubrum Korn)-type CMS(cytoplasmic male sterility)wheat hybrid combinations were used as materials in the sterile line(female parent♀). The seeds were mixed with different proportions of restoring line(male parent♂)seeds for sowing. The yield of hybrid seed production,the purity of seed production,and the change of hybrid F1 yield heterosis were studied. The results showed that the two hybrid combinations 36A×2014AR5 and 002A×99AR142-1 were mixed with different proportions of restoration line seed production,the yield of hybrid seed production increased with the increase of the mixed male parent ratio,and the seed purity of the hybrids gradually decreased. When the male parent’s mixed sowing proportion was 5%,it reached the requirement of 96% of field seed purity,and the seed production yield was also higher. The yield of the F1 generations produced by the two hybrid combinations with different mixed sowing ratios was compared,and the mixed seeding production. The seed yields of mixed sowing and mixed harvesting were higher than those of the hybrid control of the same combination and row ratio seed production,and the yield advantage of F1 with mixing ratios of 12% and 9% was more significant. The SSR molecular markers Wmc474,which were linked to the restorer gene(qRf-2A-1)and located on chromosomes 2A,were used to predict the seed purities via mixed sowing and mixed harvesting under different mixing ratios. Concurrently,the prediction results of the regression equation for purity detection of AL-type three-line hybrid wheat hybrids established by the SSR marker Xbarc8 linked to the restorer gene(qRf-1B-1)on chromosome 1B were compared,showing that the two regression equations established with the two molecular markers can be used in the identification of the purity of the seed production of mixed restorer lines.

Key words: hybrid wheat, seed production via mixed sowing and mixed harvesting, purity detection, molecular marker