Identification of Quantitative Trait Loci Underlying Plant Height and Seed Weight in Soybean

Abstract

For clarifying the genetic base of the variation of yieldrelated traits in soybean [Glycine max (L.) Merr.], we mapped quantitative trait loci (QTLs) for plant height and seed weight using a recombinant inbred line population derived from a cross between Chinese elite line Zhongpin03-5373 and cultivar Zhonghuang13. We detected 11 QTLs for plant height and 18 QTLs for seed weight across six diverse environments. These included three pairs of plant height-vs. seed weight-related QTLs located in close proximity to each other, with two pairs, qPH-7 vs. qSW-7-2 and qPH-19-2 vs. qSW-19, sharing the same direction of additive effects. Individual QTLs explained 2.02 to 47.60% of the variation in plant height and 2.13 to 14.35% in seed weight. Two and five of the major QTLs discovered for plant height and seed weight, respectively, that were stable across environments in our study have been reported previously. Among them, four QTLs,, and qSW-18, were not involved in digenic epistatic interaction in our biparental population, indicating that these QTLs will be useful for marker-assisted selection and should be targeted for the future identification of candidate genes. Moreover, eight QTLs for both plant height and seed weight were newly identified in our population.

Identification of quantitative trait loci controlling soybean seed weight in recombinant inbred lines derived from PI 483463 (Glycine soja) × ‘Hutcheson’ (G. max)

“…Liu et al. () identified two seed weight QTLs, namely qSW‐12‐2, flanked by the markers Map‐2227 (34,982,910 bp) and Satt302 (35,108,142 bp) on chromosome 12 and qSW‐19, flanked by the InDel markers Map‐3948 (42,373,670 bp) and Map‐3960 (43,459,813 bp) on chromosome 19 (Table S1). Of these QTLs, qSW‐12‐2 found to be positioned in close proximity with the QTL qSW12‐1 (BARC‐018895‐03034/BARC‐039403‐07492) identified in this study.…”

QTL mapping for yield components and agronomic traits in a Brazilian soybean population

“…QTL are reported for traits related to weight and size of the seeds (Liu et al 2011, Xu et al 2011, Han et al 2012, Sun et al 2012, Hu et al 2013, Liu et al 2013, Pathan et al 2013, Yesudas et al 2013, Kato et al 2014. Moreover, at least six QTL have been reported for grain yield, specifically (Palomeque et al 2009, Sebastian et al 2010, Kim et al 2012, Fox et al 2015, besides the several QTL mapped for other grain yield components from different populations , Guzman et al 2007, Zhang et al 2010, Liu et al 2011, Liu et al 2013.…”

“…Moreover, at least six QTL have been reported for grain yield, specifically (Palomeque et al 2009, Sebastian et al 2010, Kim et al 2012, Fox et al 2015, besides the several QTL mapped for other grain yield components from different populations , Guzman et al 2007, Zhang et al 2010, Liu et al 2011, Liu et al 2013.…”

Legume Genomics: From Genomic Resources to Molecular Breeding

“…Functional genomics plays a significant role in the identification of genes and determining the mechanisms (Sato et al 2008) Functional Genomics (Fukai et al 2013) Peanut (Arachis hypogaea) 2n = 4x = 40 2890 Underway (http://www.peanutbioscience.com) Diversity and Domestication (Gowda et al 2013) Applied Genomics (Khera et al 2013;Wang et al 2013) Pongamia (Pongamia pinnata) 2n = 2x = 22 -Not available Genomic Resources (Biswas et al 2013) Soybean (Glycine max) 2n = 2x = 20 1115 Draft assembly (Schmutz et al 2010) Applied Genomics (Liu et al 2013) conferring resistance and/or tolerance to biotic and abiotic stresses of legumes. Functional genomics uses genomic data to describe gene functions and interactions by utilizing large-scale assays to measure and track many genes or proteins in parallel under different environmental conditions.…”

“…The next article by Liu et al (2013) reports QTL analysis for plant height and seed weight in soybean. A bi-parental population derived from a cross between Chinese elite line Zhongpin03-5373 and cultivar Zhonghuang13 which comprise 254 RILs was used and evaluated for plant height and seed weight in multi-location field trials and genotyped with 508 molecular markers.…”