Fujian Journal of Agricultural Sciences ›› 2016, Vol. 31 ›› Issue (2): 107-112.doi: 10.19303/j.issn.1008-0384.2016.02.001

• Crop Science •     Next Articles

Genetic Effect and Heterosis on Yield-related Traits of Indicaclinous Restorer from Indica japonica-crossed Rice

WEI Xin-yu1, XU Xu-ming1, LI Qi-xiang2, MA Bin-lin1, YANG Wang-xing1, ZOU Wen-guang1, ZHUO Wei1, ZHANG Shou-gang1, YANG Teng-bang1, FAN Zu-jun1   

  1. 1. Sanming Academy of Agricultural Science, Sanming, Fujian 365509, China;
    2. Seed Management Station of Sanming, Sanming, Fujian 365000, China
  • Received:2015-12-20 Revised:2016-01-12 Online:2016-02-28 Published:2016-02-28

Abstract: Six early-maturing, indicaclinous type restore lines (i.e., Gmh01, Gmh03, Gmh05, Gmh06, Gm4006, and Gme24) were bred by crossing Indica japonica, and selected according to thepre-determined criteria and their restoring abilities. They were further crossed with two Indica CMS lines with a 2×6 incomplete diallele design.The genetic effect and heterosis on yield-related traits of the bred rice cultivars were analyzed using the additive-dominant genetic model.The results showed that the grains and filled grains per panicle of the rice were controlled mainly by the additive effect, while the duration from seeding to heading, length of main panicle, panicles per plant,and seed setting rate by the dominant effect.The yield-related traits of F1 had an apparent heterosis, but were affected by the genetic variation of the alleles resulting in differences on the degree and direction of the effect. Among the 6 restorers,Gmh01,Gmh03,and Gme24 exhibited significant genetic improvements and desirable overall characteristics. Hence, they were considered the potential candidates in breeding rice for the benefit of heterosis.

Key words: rice, Indica japonica crosses, indicaclinous restorer, additive/dominant genetic effect, yield-related traits, heterosis

CLC Number: 

  • S152