Identification and characterization of quantitative trait loci related to lodging resistance and associated traits in bread wheat

Abstract

Lodging is a major constraint to increasing yield in many crops, but is of particular importance in the small-grained cereals. This study investigated the genetic contro! of lodging and component traits in wheat through the detection of utiderlying quantitative trait loci (QTL), The analysis was based on the identittcation of genomic regions which affect various traits related to lodging resistance in a population of 96 doubled haploid lines of the cross 'Milan' x 'Catbird", mapped using 126 microsatellite markers. Although major genes related to plant height (Rhl genes) were responsible for increasing lodging resistanee in this cross, several other traits independenl of plant height were shown to be important such as rool and shoot traits, and various components of plant yield. Yield components sueh as grain number and weight were shown to be an indicator of plant susceptibility to lodging-QTL for lodging and associated traits were found on chromosomes IB, ID. 2B. 2D. 4B, 4D. 6D and 7D. QTL for yield and associated traits were identified on chromosomes IB, ID. 2A. 2B. 2D. 4D and 6A,

Genetic relationship between lodging and lodging components in barley (Hordeum vulgare) based on unconditional and conditional quantitative trait locus analyses

“…Marker-assisted selection has potential to improve the efficiency of selection for lodging resistance in breeding programs. Thus, QTL studies on the correlation between LD and other traits have been performed in several cereal crops, such as soybean, rice (Kashiwagi et al, 2008;Zhu et al, 2008), wheat Zuber et al, 1999;Börner et al, 2002;Kelbert et al, 2004;Verma et al, 2005), maize (Flint-Garcia et al, 2003), and field pea. However, little information related to barley LD has been reported to date (Sameri et al, 2009).…”

Molecular dissection of plant height QTLs using recombinant inbred lines from hybrids between common wheat (Triticum aestivum L.) and spelt wheat (Triticum spelta L.)

“…Some of these genes have been *Corresponding authors (email: penghuiru@cau.edu.cn; qxsun@cau.edu.cn) exploited to breed many semidwarf cultivars with high yield potential. Recently, along with the advent of molecular quantitative genetics, about 50 quantitative trait loci (QTLs) for wheat plant height have been identified using the constructed molecular genetic linkage maps [3][4][5][6][7][8][9][10][11][12][13][14][15]. However, QTL mapping of plant height in wheat was only focused on the performance of this trait at the maturing stage.…”

Spring barley stand structure as an indicator of lodging risk

“…Lodging resistance in cereals is determined by both genetic and environmental factors (Verma et al, 2005). Many authors have observed that lodging resistance of barley is affected by the physical and morphological properties of the stem (Chen et al, 2014).…”