HUBEI AGRICULTURAL SCIENCES ›› 2021, Vol. 60 ›› Issue (22): 24-26.doi: 10.14088/j.cnki.issn0439-8114.2021.22.004

• Breeding & Cultivation • Previous Articles     Next Articles

Analysis of combining ability of 13 new sterile lines in rice at heading date

CAI Xing-xing1, LI Xing-hua1, WANG Huan1, ZHANG Sheng1, ZHOU Nan2, RAO Deng-feng3, ZHOU Qiang1   

  1. 1. Huanggang Academy of Agricultural Sciences,Huanggang 438000,Hubei,China;
    2. Hubei Nongyi Biotechnology Co.,Ltd.,Huanggang 438000,Hubei,China;
    3. Yingshan Administration of Seed,Yingshan 438700,Hubei,China
  • Received:2020-12-18 Online:2021-11-25 Published:2021-12-10

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Abstract: A total of 182 F1 were obtained by combining 14 restorer lines with strong combining ability with 13 newly selected sterile lines with excellent comprehensive agronomic traits, so as to investigate the combining ability of 13 sterile lines at heading date. The results showed that B8 had the best general combining ability, followed by B1, B4 and B7, and B10, B11 and B12 had the worst general combining ability. Hybrid rice combinations of B8, B1, B4 and B7 were more likely to be bred 3 days earlier than those of the control, and combinations of B2, B5, B10, B11, B12 and B13 were not easy to be bred 3 days earlier than those of the control. The heritability of heading date was higher, and the correlation coefficient between heading date and general combining ability was 0.71.

Key words: rice, heading date, combining ability

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