Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (2): 218-228.DOI: 10.1016/S2095-3119(13)60221-X

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QTL Mapping for Stalk Related Traits in Maize (Zea mays L.) Under Different Densities

 ZHU Li-ying, CHEN Jing-tang, Li Ding, ZHANG Jian-hua, HUANG Ya-qun, ZHAO Yong-feng, SONG Zhan-quan , LIU Zhi-zeng   

  1. 1.College of Agronomy, Agricultural University of Hebei/Hebei Sub-Center of National Maize Improvement Center, Ministry of Agriculture/Northern China Key Laboratory for Crop Germplasm Resources, Ministry of Education, Baoding 071001, P.R.China
    2.Baoding University, Baoding 071051, P.R.China
  • 收稿日期:2012-02-10 出版日期:2013-02-01 发布日期:2013-02-06
  • 通讯作者: Correspondence CHEN Jing-tang, Tel: +86-312-7528108, E-mail: chenjingtang@126.com
  • 作者简介:ZHU li-ying, Tel: +86-312-7528402, E-mail: zhuliyiny@126.com
  • 基金资助:

    The study was conducted with the support of the Key Technologies R&D Program of China during the 12th Five- Year Plan period (2011BAD35B01) and the National High- Tech R&D Program of China (2011AA10A103-3).

QTL Mapping for Stalk Related Traits in Maize (Zea mays L.) Under Different Densities

 ZHU Li-ying, CHEN Jing-tang, Li Ding, ZHANG Jian-hua, HUANG Ya-qun, ZHAO Yong-feng, SONG Zhan-quan , LIU Zhi-zeng   

  1. 1.College of Agronomy, Agricultural University of Hebei/Hebei Sub-Center of National Maize Improvement Center, Ministry of Agriculture/Northern China Key Laboratory for Crop Germplasm Resources, Ministry of Education, Baoding 071001, P.R.China
    2.Baoding University, Baoding 071051, P.R.China
  • Received:2012-02-10 Online:2013-02-01 Published:2013-02-06
  • Contact: Correspondence CHEN Jing-tang, Tel: +86-312-7528108, E-mail: chenjingtang@126.com
  • About author:ZHU li-ying, Tel: +86-312-7528402, E-mail: zhuliyiny@126.com
  • Supported by:

    The study was conducted with the support of the Key Technologies R&D Program of China during the 12th Five- Year Plan period (2011BAD35B01) and the National High- Tech R&D Program of China (2011AA10A103-3).

摘要: Stalk related traits, comprising plant height (PH), ear height (EH), internode number (IN), average internode length (AIL), stalk diameter (SD), and ear height coefficient (EHC), are significantly correlated with yield, density tolerance, and lodging resistance in maize. To investigate the genetic basis for stalk related traits, a doubled haploid (DH) population derived from a cross between NX531 and NX110 were evauluated under two densities over 2 yr. The additive quantitative trait loci (QTLs), epistatic QTLs were detected using inclusive composite interval mapping and QTL-by-environment interaction were detected using mixed linear model. Differences between the two densities were significant for the six traits in the DH population. A linkage map that covered 1 721.19 cM with an average interval of 10.50 cM was constructed with 164 simple sequence repeat (SSR). Two, two, seven, six, two, and eight additive QTLs for PH, IN, AIL, EH, SD, and EHC, respectively. The extend of their contribution to penotypic variation ranged from 10.10 to 31.93%. Seven QTLs were indentified simultaneously under both densities. One pair, two pairs and one pair of epistatic effects were detected for AIL, SD and EHC, respectively. No epistatic effects were detected for PH, EH, and IN. Nineteen QTLs with environment interactions were detected and their contribution to phenotypic variation ranged from 0.43 to 1.89%. Some QTLs were stably detected under different environments or genetic backgrounds comparing with previous studies. These QTLs could be useful for genetic improvement of stalk related traits in maize breeding.

关键词: maize , density , stalk related traits , quantitative trait loci , epistatic effect , QTL-by-environment interaction

Abstract: Stalk related traits, comprising plant height (PH), ear height (EH), internode number (IN), average internode length (AIL), stalk diameter (SD), and ear height coefficient (EHC), are significantly correlated with yield, density tolerance, and lodging resistance in maize. To investigate the genetic basis for stalk related traits, a doubled haploid (DH) population derived from a cross between NX531 and NX110 were evauluated under two densities over 2 yr. The additive quantitative trait loci (QTLs), epistatic QTLs were detected using inclusive composite interval mapping and QTL-by-environment interaction were detected using mixed linear model. Differences between the two densities were significant for the six traits in the DH population. A linkage map that covered 1 721.19 cM with an average interval of 10.50 cM was constructed with 164 simple sequence repeat (SSR). Two, two, seven, six, two, and eight additive QTLs for PH, IN, AIL, EH, SD, and EHC, respectively. The extend of their contribution to penotypic variation ranged from 10.10 to 31.93%. Seven QTLs were indentified simultaneously under both densities. One pair, two pairs and one pair of epistatic effects were detected for AIL, SD and EHC, respectively. No epistatic effects were detected for PH, EH, and IN. Nineteen QTLs with environment interactions were detected and their contribution to phenotypic variation ranged from 0.43 to 1.89%. Some QTLs were stably detected under different environments or genetic backgrounds comparing with previous studies. These QTLs could be useful for genetic improvement of stalk related traits in maize breeding.

Key words: maize , density , stalk related traits , quantitative trait loci , epistatic effect , QTL-by-environment interaction