African Journal of

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12487

Full Length Research Paper

A quantitative trait locus for the number of days from sowing to seedling emergence in maize

Zu-Ping Zheng1, Xiao-Hong Liu2*, Yu-Bi Huang3, Xun Wu1, Chuan He1 and Zhong Li1            
1Nanchong Institute of Agricultural Sciences, Nanchong City 637000, People’s Republic of China. 2Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), College of Life Sciences, China West Normal University, Nanchong City 637000, People’s Republic of China. 3Maize Research Institute, Sichuan Agricultural University, Ya’an City 625014, People’s Republic of China.
Email: [email protected]

  •  Accepted: 25 March 2011
  •  Published: 13 June 2011


Quantitative trait locus (QTL) mapping provides useful information for breeding programs since it allows the estimation of genomic locations and genetic effects of chromosomal regions related to the expression of quantitative traits. The number of days from sowing to seedling emergence (NDSSE) is an important agronomic trait in a maize (Zea mays L.) breeding project which is related to yield. To determine its genetic basis, a recombinant inbred line (RIL) population and two nitrogen (N) regimes were used to detect the QTLs associated with NDSSE; as a result, one QTL was identified under high N regime, on chromosome 9, which could explain 6.20% of phenotypic variance and a decrease of 0.18 of NDSSE due to an additive effect. These results are beneficial for understanding the genetic basis of NDSSE in maize breeding project.


Key words: Maize (Zea mays L.), quantitative trait locus, recombinant inbred line, nitrogen.


QTL, Quantitative trait locus; NDSSE, number of days from sowing to seedling emergence; RIL, recombinant inbred line.