Plant Genetic Research
Scientific Journal

qGW, a Stable and Major QTL for Increasing of Grain Weight in Rice (Oryza sativa L.)

Document Type : Original Article

Authors

Mohammad Reza Jafarzadeh Razmi 1
Saeed Navabpour 1
Hossein Sabouri 2
Seyedeh Sanaz Ramazanpour 1

1 Department of Plant Breeding and Biotechnology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

2 Department of Plant Production, Gonbad kavous University, Gonbad kavous, Irna

https://doi.org/10.29252/pgr.6.2.173
Abstract
In order to analyze the genetic components of agronomic traits among 116 F9 recombinant lines
derived from crosses of Ahlamitarom × Sepidroud rice cultivars, an experiment was conducted as a
randomized complete block design in research farm of Gonbad Kavous University of Agriculture with
three replications in 2016 and 2017. Genetic linkage map provided with 80 SSR markers, 28 iPBS
Markers (79 polymorphic alleles), 7 IRAP markers (17 polymorphic alleles) and 26 ISSR markers (70
polymorphic alleles), which covered 1275.4 cM of the rice genome. QTL analysis was performed by
Composite Interval Mapping. In two years, 15 QTLs detected for the studied traits. The additive
effected varied from 6.725 g for grain weight up to -85.626 g for grain weight. Also, R2 for the
detected QTLs explained from 11.3% to 20% of the total variation. The highest R2 was related to grain
weight in the first year of experiment. Among the detected QTLs, qGWs on chromosome 1, were
found to be stable and large effector QTLs for rice (Oryza sativa L.) grain weight, and can be used in
marker-assisted breeding and selection programs after validation.

Keywords

Rice
Molecular markers
Linkage map
Grain weight
Shoot weight
QTL
Plant Genetic Research
Volume 6, Issue 2
December 2019
Pages 173-182

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