Identification of quantitative trait loci for agronomic traits contributed by a barley (Hordeum vulgare) Mediterranean landrace

Abstract

Some Spanish barley (Hordeum vulgare L.) landraces perform better than modern cultivars at low-production sites. The objective of this study was to identify favourable quantitative trait loci (QTLs) for interesting agronomic traits contributed by the landrace SBCC073. To achieve this objective, a population of 100 BC1F5 lines was derived from the cross between the elite cultivar Orria, with high productivity, and the Spanish landrace SBCC073, which was the best performer in low-production trials. The population was evaluated in field trials for 3 years (2011, 2013, and 2014) in Zaragoza, Spain. The population was genotyped with a DArTseq genotyping-by-sequencing assay. A genetic linkage map was developed by using markers of four flowering-time genes and 1227 single-nucleotide polymorphisms of good quality. The genetic map resulted in 11 linkage groups, covering a total distance of 871.1 cM. Five QTLs for grain yield were detected on 2H.1, 4H, 5H and 6H.2. Alleles from SBCC073 contributed to increased yield in three of them. A region at the end of chromosome 5H contains favourable alleles for early vigour, higher grain yield and earlier flowering, all derived from SBCC073. Alleles from Orria contributed to increasing grain yield and simultaneously to reducing plant height on the same region of 6H.2, and to increasing 1000-kernel weight on chromosomes 3H and 5H.

Genotype by environment interaction using AMMI model and estimation of additive and epistasis gene effects for 1000-kernel weight in spring barley (Hordeum vulgare L.)

“…In this study, the three sources of variation were highly significant. Similar results for 1000-kernel weight in barley were obtained by Swanston et al ( 1997 ) and Boudiar et al ( 2016 ). Kumar et al ( 2017 ) obtained not-significant GE interaction for 1000-kernel weight of 25 genotypes grown in India.…”

Effects of Low Water Availability on Root Placement and Shoot Development in Landraces and Modern Barley Cultivars

“…These strategies should be explored further. Actually, several populations were developed from crosses between SBCC073 or SBCC042, with cultivar Cierzo, and SBCC073 with cultivar Orria [15,58], and are amenable for future studies. The results of the present experiment led us to propose making a new population from the cross between SBCC073 and SBCC146, to test rooting features and shoot-root dynamics between these genotypes with contrasting partitioning features.…”

“…Landraces have been acknowledged as a source of favorable traits for barley breeding [10][11][12][13][14][15]. Early vigor, defined as fast development of leaf area and/or crop biomass has been proposed as one of the traits responsible for the good performance of landraces in drought-prone environments [16].…”

Large Differences in Gene Expression Responses to Drought and Heat Stress between Elite Barley Cultivar Scarlett and a Spanish Landrace

“…Spanish barley landrace SBCC073 was the best yielding genotype, among 159 landraces and 25 old and modern cultivars, in field trials in Spain in which average yield was below 3 t ha −1 (Yahiaoui et al, 2014 ). Also, it contributed QTLs for increased grain yield and early vigor in field experiments in Spain, particularly under drought, in a population in which SBCC073 was crossed with a highly productive cultivar, grown for three seasons with contrasting rainfall conditions (Boudiar et al, 2016 ). Therefore, SBCC073 is a landrace with valuable traits to be incorporated in breeding programs for improvement of barley for Mediterranean conditions.…”