TITLE:
QTL Positioning of Thousand Wheat Grain Weight in Qaidam Basin
AUTHORS:
Le Wei, Shenggui Bai, Jianmin Li, Xiujuan Hou, Xin Wang, Hongqing Li, Bo Zhang, Wenjie Chen, Dencai Liu, Baolong Liu, Huaigang Zhang
KEYWORDS:
Triticum aestivum, TGW, QTL Analysis, Qaidam Basin
JOURNAL NAME:
Open Journal of Genetics,
Vol.4 No.3,
June
27,
2014
ABSTRACT: TGW is an important
agronomic trait that influences the yield and milling quality of wheat. In this
paper, after having investigated the phenotype of TGW from 114 ITMI recombinant
inbred genealogies in 4 years in Qaidam Basin, a typical plateau oasis
agricultural area, and having combined 1410 molecular markers, 7 major QTL loci
of the thousand gain weight were screened out with the aid of QTL network
software. These loci included qTgw1B (42.6 cm), qTgw2A(77.9 cm), qTgw2D1 (25.4 cm), qTgw2D2 (51.8 cm),
qTgw6A1 (56.1 cm), qTgw6A2 (62.2 cm) and qTgw7A(75.7 cm) with their genetic contribution
rates between 3.29% - 19.36%. There were two epistatic effect loci2A-2D and2A-6B with their genetic contribution rates as 2.3%
and 5.3% respectively. The quantitative genetic locus positioning of thousand
hexaploid wheat grain weight in Qaidam Basin can assist us in better
understanding the genetic regulatory network formed by TGW, and can also
provide a theoretical basis for improving thousand wheat grain weight in this
ecological area.