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Acta Agron Sin ›› 2006, Vol. 32 ›› Issue (04): 503-508.

• ORIGINAL PAPERS • Previous Articles     Next Articles

Heterosis Analysis of Starch RVA Viscosity in Waxy Corn

LU Fang-Fang;LU Wei-Ping;LIU Ping;SHEN Xin-Ping;WANG Ji-Feng; LIU Xiao-Bing   

  1. Jiangsu Provincial Key Laboratory of Crop Genetics and Physiology of Yangzhou University, Yangzhou 225009, Jiangsu, China
  • Received:2005-04-11 Revised:1900-01-01 Online:2006-04-12 Published:2006-04-12
  • Contact: LU Wei-Ping

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Abstract:

Ten waxy corn inbreds and their fifty hybrids by p+q+2pq genetic design were used to investigate the heterosis of starch RVA viscosity. The results showed: (1) all the RVA characteristics of the fifty hybrids had a wide genetic variations, among which Setback(SB) was the largest, ranged from 122.33 cP to 249 cP, Pasting Temperature(PTP) was the smallest, ranged from 76.92℃ to 79.5℃; (2) the differences of all the RVA pasting properties of hybrids were higher than those of the parents, and the means of the peak viscosity(PV), breakdown(BD), SB of all the hybrids were higher than those of the parents; (3) over-MP heterosis was found in BD, over-LP heterosis in PV and SB, no heterosis was found in Trough Viscosity(TV), Final Viscosity(FV), Peak time (PT) and PTP;（4） PV, TV, BD and SB of the hybrids were significantly correlated with those of their female parents and mid-value of parents, while FV, PT and PTP were not.

Key words: Waxy corn, Starch RVA viscosity, Heterosis

CLC Number: 

  • S513
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