The Mixed Genetic Analysis of Thermo-sensitive Male Sterility of SCT-1 in Wheat

doi:10.7668/hbnxb.2014.06.013

Abstract

Abstract: In this research we try to explore the genetic characteristics of thermo-sensitive male sterility line SCT-1 in Sichuan ecological condition,in order to provide a theoretical guidance for its utilization and lay a foundation for the further breeding.We chosed two different restore lines to make the two crosses (SCT-1/B2183,SCT-1/M2003-1),investigated the self-setting seed in 4 populations of 2 parents (P1 and P2),F₁ and F₂ to analyses genetic characteristics of sterility by the mixed major gene plus poly-genes genetic model method.Results showed that the genetic model MX2-AD-AD (two additive-dominance major genes plus additive-dominance poly-genes) was the most suitable model for the cross SCT-1/B2183,while MX1-AD-ADI(one additive-dominance major genes plus additive-dominance-epitasis poly-genes) model was better fit the cross SCT-1/M2003-1.Major-gene heritability of the two different crosses was 92.89% and 91.19% respectively.Major-genes have important influence in fertility,we could cultivate good restore line by converge different major-gene.

Key words: Thermo-sensitive male sterility in wheat, Major gene plus poly-genes genetic model, Fertility, Heritability

CLC Number:

S512.03

ZHENG Jian-min, PU Zong-jun, LI Shi-zhao, LI Jun, YANG En-nian, SUN Hua, LIU Pei. The Mixed Genetic Analysis of Thermo-sensitive Male Sterility of SCT-1 in Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(6): 68-72. doi: 10.7668/hbnxb.2014.06.013.

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http://www.hbnxb.net/EN/Y2014/V29/I6/68

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