Identification of QTL for Tolerance to Flooding Stress at Seedling Stage of Soybean (Glycine max L. Merr.)

Flooding stress is a serious problem in soybean production, causing a remarkable yield reduction. The onset of rainy season during the early growth of soybean in Korea and some other parts of the world potentially subjects soybean plants to flooding stress. The objective of this study was to map qua...

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Bibliographic Details
Published in:Agronomy (Basel) 2021-05, Vol.11 (5), p.908
Main Authors: Dhungana, Sanjeev Kumar, Kim, Hong-Sik, Kang, Beom-Kyu, Seo, Jeong-Hyun, Kim, Hyun-Tae, Shin, Sang-Ouk, Oh, Jae-Hyeon, Baek, In-Youl
Format: Article
Language:English
Subjects:
Adenosine
Agricultural production
Chlorophyll
Chromosome 7
Chromosomes
Climate change
Crop production
Cultivars
Flooding
flooding tolerance
Floods
Gene mapping
Genotype & phenotype
Genotyping
Glycine max
Inbreeding
leaf chlorophyll content
Markers
Nitrogen
Phenotypic variations
Plant breeding
Plant growth
Ponding
Population
QTL analysis
Quantitative trait loci
Rainy season
seedling stage
Seedlings
Seeds
shoot dry weight
Soil surfaces
Soil water
soybean
Soybeans
Stainless steel
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Summary:Flooding stress is a serious problem in soybean production, causing a remarkable yield reduction. The onset of rainy season during the early growth of soybean in Korea and some other parts of the world potentially subjects soybean plants to flooding stress. The objective of this study was to map quantitative trait loci (QTL) for flooding tolerance using a recombinant inbred line (RIL) population derived from a cross between ‘Danbaekkong’ (flood-tolerant) and ‘NTS1116′ (flood-susceptible) cultivars grown in a plastic house for two years. The plants were flood-stressed at the V1-V2 stage by ponding about 10 cm water from the soil surface. Leaf chlorophyll content and shoot dry weight were measured under control and flooded conditions to map the QTL. The genetic map was constructed using 1689 polymorphic markers obtained from the 180K Axiom® SoyaSNP markers used for genotyping the population. Ten QTL with 3.39–5.14 logarithm of odds scores and 8.1–30.7% phenotypic variations (PVE) were identified on seven chromosomes. One QTL on chromosomes 6 and 15 and two QTL on chromosome 7 were detected at least in two different environments causing up to 30.7% PVE, suggesting their potential applications in the breeding of flood-tolerant soybeans. The results could be useful in further exploring the genetic basis of flooding tolerance and developing tolerant cultivars of soybean.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy11050908