假俭草杂交后代生殖性状遗传及相关性分析

草业学报 ›› 2011, Vol. 20 ›› Issue (2): 283-289.

假俭草杂交后代生殖性状遗传及相关性分析

郑轶琦¹,臧国长¹,郭海林²,刘建秀^2*,任舸¹

1.河南科技大学林学院,河南洛阳 471003;
2.江苏省中国科学院植物研究所,江苏南京 210014

收稿日期:2010-03-25 出版日期:2011-02-25 发布日期:2011-04-20
通讯作者: E-mail:turfunit@yahoo.com.cn
作者简介:郑轶琦(1977-),女,河南洛阳人,讲师,博士。E-mail:botanyzyq@yahoo.com.cn
基金资助:
国家自然科学基金(30670200)资助。

Analysis of heredity and correlation of reproductive traits in centipedegrass (Eremochloa ophiuroides)hybrids

ZHENG Yi-qi¹, ZANG Guo-zhang¹, GUO Hai-lin², LIU Jian-xiu², REN Ge¹

1. Forestry College of Henan University of Science and Technology, Luoyang 471003, China;
2.Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China

Received:2010-03-25 Online:2011-02-25 Published:2011-04-20

摘要/Abstract

摘要： 选用假俭草2份生殖性状存在差异的种源材料E102和E092(1)进行杂交,获得F₁分离群体,应用植物数量性状主基因＋多基因混合遗传模型分析方法对F₁群体的花序密度、生殖枝高度、每穗粒数和花序长度等生殖性状进行遗传分析,已初步明确假俭草上述性状的遗传特性。结果表明,1)在调查的杂交后代的4个生殖性状中,变异系数由大到小依次为花序密度(54.10%)>生殖枝高度(13.17%)>每穗粒数(8.92%)>花序长度(8.42%),变异系数最大的为花序密度,最小的为花序长度。2)花序密度的最佳遗传模型为A-4模型,即一对主基因模型,该主基因表现为负向完全显性,即显性效应等于负的加性效应,主基因遗传率为60.71%。生殖枝高度的最佳遗传模型为B-1模型,即2对主基因,加性－显性－上位性模型,主基因遗传率为93.73%。花序长度也是B-1模型,主基因遗传率为96.79%。每穗粒数最佳遗传模型均为A-0模型,即无主基因模型。性状间相关分析结果表明,叶片长度与叶片宽度、叶片长度与草层高度之间呈极显著的正相关,相关系数分别是0.417 8和0.628 5;生殖枝高度与花序密度、生殖枝高度与每穗粒数之间呈显著的正相关,相关系数分别为0.374 8和0.356 2;生殖枝高度与草层高度之间呈极显著正相关,相关系数为0.423 0。

Abstract: The heredity of reproductive characters, i.e. inflorescence density, reproductive branch height, inflorescence length, and specule number per spike were analyzed by a mixed model of major genes and polygenes, to reveal the genetic mechanism of these traits. The result showed: 1) The widest variation is found in the inflorescence density that has a coefficient of variance (CV) of 54.10%, followed by the variations of reproductive branch height, specule number per spike and inflorescence length with each CV amounting to 13.17%, 21.89%, 8.92% and 8.42%, respectively. 2) One major gene model with negative dominance (A-4) was the most suitable model for inflorescence density and the heritability of major genes was 60.71%. The reproductive branch height and inflorescence length were all controlled by two addivive-dominance-epistasis major genes model (B-1), and the heritability of major genes were 93.73% and 96.79%, respectively. The most suitable model of specule number per spike was with a no major gene model (A-0). Correlation analysis showed that, leaf length and width had a very significant correlation coefficient of 0.417 8. Leaf length and height of turf also had very significant levels of correlation (0.628 5). The reproductive branch height and inflorescence density, reproductive branch height and inflorescence length, reproductive branch height and height of turf all had significant levels of correlation (coefficients of 0.374 8, 0.356 2 and 0.423 0 respectively).

中图分类号:

郑轶琦,臧国长,郭海林,刘建秀,任舸. 假俭草杂交后代生殖性状遗传及相关性分析[J]. 草业学报, 2011, 20(2): 283-289.

ZHENG Yi-qi, ZANG Guo-zhang, GUO Hai-lin, LIU Jian-xiu, REN Ge. Analysis of heredity and correlation of reproductive traits in centipedegrass (Eremochloa ophiuroides)hybrids[J]. Acta Prataculturae Sinica, 2011, 20(2): 283-289.

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