Acta Agrestia Sinica

›› 2009, Vol. 17 ›› Issue (6): 713-717.DOI: 10.11733/j.issn.1007-0435.2009.06.004

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Genetic Analysis of Plant Height and Leaf Number Related Main Gene and Polygene of Sorghum× Sudan Grass

LU Xiao-ping1, YUN Jin-feng2, CHEN Qiang3, MI Fu-gui2, ZHANG Ya-hui1, XUE Chun-lei1   

  1. 1. College of Agronomy, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia Autonomous Region 010018, China;
    2. College of Ecology and Environment, Inner Mongolia Agricultural University, Huhhot, Inner Mongolia Autonomous Region 010018, China;
    2. Agriculture Academy of Erdos city in Inner Mongolia, Erdos, Inner Mongolia Autonomous Region 017000, China
  • Received:2009-04-21 Revised:2009-09-09 Online:2009-12-15 Published:2009-12-15

高丹草株高与叶片数主基因+多基因的遗传分析

逯晓萍1, 云锦凤2, 陈强3, 米福贵2, 张雅慧1, 薛春雷1   

  1. 1. 内蒙古农业大学农学院, 呼和浩特, 010018;
    2. 内蒙古鄂尔多斯市农业科学研究所, 鄂尔多斯, 017000
  • 通讯作者: 云锦凤,E-mail:csgrass@public.hh.nm.cn
  • 作者简介:逯晓萍(1960- ),女,内蒙古呼和浩特人,博士,教授,主要从事植物遗传育种及生物技术的研究,E-mail:LXP1960@163.com
  • 基金资助:
    国家自然科学基金(30660096)

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Abstract: The main gene + polygene mixed model was used in genetic analysis of height and leaf number of 5 plant materials(P<sub>1,P<sub>2,F1,F2,F2:3) of Sorghum×Sudan grasses(2002GZ-1 and 2002GB-1) in 2005.The results showed the plant height character related to 2 pairs of additive-dominant main gene+additive-dominant polygene(E-2).The leaf number character related to 2 pairs of additive-dominant-epistatic main gene+additive-dominant polygene(E-1).The 2 characters genetics subjected to the main gene + polygene mixed model,and the main genes decided the height and the leaf number expression.The contribution of 2 main genes in height effect on addition and domination were 26.98,10.02 and 2.36,1.61 correspondingly,while that of polygene were-6.95 and-5.06.The heritability of main gene in F2and F2:3 were 77.94% and 82.95%.The contribution of 2 main genes in leaf number effect on addition and domination were 6.11,1.04 and 0.63,-0.09 correspondingly,while that of polygene were-0.16,-0.11.The heritability of main gene in F2 and F2:3 were 89.30% and 91.60%.It showed that the 2 characters were mainly controlled by main gene.The related selection should be carried in early progenies.The result of the agronomic character genetic model provided the guide for Sorghum×Sudan grass improvement and heterosis prediction.

Key words: Sorghum×Sudan grass, Plant height, Leaf number, Heredity, Main gene+polygene mixed genetics

摘要： 于200年采用主基因+多基因混合遗传模型,对高丹草(Sorghum×Sudan grass)2002 GZ-1和2002 GB-1杂交组合的个世代(P<sub>1,P<sub>2,F1,F2,F2:3)群体的株高和叶片数进行联合分析.结果表明:株高遗传受2对加性-显性主基因+加性-显性多基因(E-2)控制;叶片数遗传受2对加性-显性-上位性主基因+加性-显性多基因(E-1)控制,两性状的遗传符合2对主基因+多基因混合遗传模型,主基因对株高、叶片数的表现起主要作用.株高中主基因加性和显性效应分别为26.98、10.02和2.36、1.61,而多基因分别为-6.9和-.06,F2和F2:3的主基因遗传率分别为77.94%和82.9%.叶片数主基因的加性和显性效应分别为6.11、1.04和0.63、-0.09,多基因分别为-0.16、-0.11,F2和F(2:3)的主基因遗传率分别为89.30%和91.60%.表明2个性状是以主基因遗传为主,应在早期世代进行选择.该性状所属遗传模型的研究,旨在为高丹草的遗传改良和杂种优势利用提供理论依据.

关键词: 高丹草, 株高, 叶片数, 遗传, 主基因+多基因混合遗传

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