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Acta Agron Sin ›› 2010, Vol. 36 ›› Issue (1): 28-35.doi: 10.3724/SP.J.1006.2010.00028

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

Direct Selection Response for Flowering Traits in Four Tropical and Subtropical Maize Populations by Mass Selection

ZHANG De-Gui1,2,LI Xin-Hai2,LI Ming-Shun2,XIE Chuan-Xiao2,HAO Zhuan-Fang2,BAI Li2,ZHANG Shi-Huang2,PAN Guang-Tang1*   

  1. 1Maize Research Institute，Sichuan Agricultural University，Ya’an 625014，China；2Institute of Crop Sciences，Chinese Academy of Agricultural Sciences，Beijing 100081，China
  • Received:2009-07-22 Revised:2009-10-08 Online:2010-01-12 Published:2009-11-17
  • Contact: PAM Guang-Tang, E-mail: pangt@sicau.edu.cn

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Abstract:

Selection responses were characterized among 4 circles in 2 tropical populations and 2 subtropical populations at two locations during 2006–2007. Analysis of variance indicated that the difference for most flowering traits was not significant among different cirles in the same population in Hainan, while significant progress (P<0.05) was available among populations for flowering traits under evaluation in Beijing. The mean days to silking for tropical POB43 and SUWAN-1 advanced respectively from 99.2 and 90.7 to 79.5 and 76.2, with average of 4.9 and 3.6 in advance per circle, days to anthesis advanced respectively from 90.8 and 77.8 to 76.7 and 74.7, with average of 3.5 and 0.8 in advance per circle, and the mean ASI advanced respectively from 8.3 and 12.8 days to 2.8 and 3.5, averaged 1.4 and 2.3 days in advance per circle. The mean days to silking for subtropical POB69 and POB70 advanced respectively from 78.3 and 81.8 to 69.2 and 69.0, with average of 2.3 and 3.2 in advance per circle, days to anthesis advanced respectively from 71.0 and 72.5 to 67.5 and 68.0 with average of 0.9 and 7.0 days in advance per circle, and the mean ASI advanced respectively from 7.3 and 9.3 days to 1.7 and 2.7 days, averaged 1.4 and 1.7 days in advance per circle. The selection responses obtained in this paper indicated that controlling bi-parental mass selection effectively improved the adaptability of the four tropical and subtropical maize populations.

Key words: Tropical maize, Subtropical maize, Mass selection, Selection response, Photoperiod-sensitive

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