Molecular detection of QTL controlling plant height components in a doubled haploid barley population

Ren, Xiaoping; Sun, Dongfa; Dong, Wubei; Sun, Genlou; Li, C D

doi:10.4238/2014.april.17.5

Cited by 22 publications

(50 citation statements)

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“…QTL analysis is a useful approach to discover and identify favorable alleles in barley [ 42 ]. Ren et al [ 43 ] have studied the correlation and QTL of agronomic and quality traits associated with grain yield in a barley DH population. However, QTL associated with physiological and morphological traits of flag leaf at the pre-filling stage have not been systematically analyzed.…”

Section: Discussionmentioning

confidence: 99%

Identification of QTL underlying physiological and morphological traits of flag leaf in barley

et al. 2015

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BackgroundPhysiological and morphological traits of flag leaf play important roles in determining crop grain yield and biomass. In order to understand genetic basis controlling physiological and morphological traits of flag leaf, a double haploid (DH) population derived from the cross of Huaai 11 × Huadamai 6 was used to detect quantitative trait locus (QTL) underlying 7 physiological and 3 morphological traits at the pre-filling stage in year 2012 and 2013.ResultsTotal of 38 QTLs distributed on chromosome 1H, 2H, 3H, 4H, 6H and 7H were detected, and explained 6.53% - 31.29% phenotypic variation. The QTLs flanked by marker Bmag829 and GBM1218 on chromosome 2H were associated with net photosynthetic rate (Pn), stomatal conductance (Gs), flag leaf area (LA), flag leaf length (FLL), flag leaf width (FLW), relative chlorophyll content (SPD) and leaf nitrogen concentration (LNC).ConclusionTwo QTL cluster regions associated with physiological and morphological traits, one each on the chromosome 2H and 7H, were observed. The two markers (Bmag829 and GBM1218) may be useful for marker assisted selection (MAS) in barley breeding.

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Section: Discussionmentioning

confidence: 99%

Identification of QTL underlying physiological and morphological traits of flag leaf in barley

et al. 2015

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“…The plant height (PH) and grain yield (GY) are important traits in barley breeding programs, given that an appropriate plant height is a prerequisite for achieving the desired yield (Ren, Sun, Dong, Sun, & Li, 2014). Plant height is a complex trait determined by many genes with small effects (Alheit et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

<b>Identification of QTL underlying agronomic, morphological and physiological traits in barley under rainfed conditions using SNP markers

et al. 2017

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ABSTRACT. Barley (Hordeum vulgare L.) is considered a good genetic model for evaluating mechanisms of drought tolerance, and it is the most important threat to crop production worldwide. This study aimed to identify single-nucleotide polymorphisms (SNPs) associated with agronomic, morphological and physiological traits in a population of 137 recombinant chromosome substitution lines (RCSL) of barley, which were evaluated under rainfed conditions, in Cauquenes, southern Chile (35°58' S, 72°17' W). The annual precipitation was 299 mm during the growing season. Fifty-two significant QTLs were detected for the studied traits, which explained between 5% and 13.8% of the phenotypic variation. A genomic region on chromosome 1H (that comprises SNPs 2711-234 and 1923-265) accounted for 13.4% and 13.8%, respectively, of the grain yield variation. In addition, SNPs 8388-578 and 7639-122 on the chromosome 5H had a moderate effect, explaining 12.8% of the plant height variation. Moreover, some SNPs were associated with more than one trait, and clusters of QTLs for yield and related traits were also found. Finally, the QTLs identified in the present study are of particular interest for barley-breeding purposes under rainfed conditions. Keywords:Hordeum vulgare, mixed model, recombinant chromosome substitution lines, segregation distortion.Identificação de QTL associados a características agronômicas, morfológicas e fisiológicas em cevada sob condições de sequeiro, usando marcadores SNP RESUMO. Cevada (Hordeum vulgare L.) é uma cultura modelo para a avaliação genética dos mecanismos de tolerância à seca; a ameaça mais importante para a produção agrícola a nível mundial. Objetivou-se identificar polimorfismos de nucleotídeo único (SNP) associados a características agronômicas, morfológicas e fisiológicas numa população de 137 linhas recombinantes com substituição cromossômica (RCSL) de cevada, avaliadas sob condições de sequeiro, em Cauquenes, sul do Chile (35°58' S, 72°17' O). A precipitação anual foi de 299 mm durante o período vegetativo. Cinquenta e dois QTLs foram encontrados para as características estudadas, explicando entre 5% e 13.8% da variação fenotípica. A região genômica no cromossomo 1H (que compreende os SNPs 2711-234 e 1923-265) foi responsável de ~13% da variação no rendimento de grãos. Além disso, os SNPs 8388-578 e 7639-122 no cromossomo 5H teve um efeito moderado, explicando 12,8% da variação para altura da planta. Além disso, alguns SNPs foram associados com mais de uma característica, e grupos de QTLs para rendimento de grãos e características relacionadas também foram encontrados. Finalmente, os QTLs identificados no presente estudo podem ser de particular interesse para fins de melhoramento de cevada em ambiente de sequeiro.Palavras-chave: Hordeum vulgare, modelo misto, linhas recombinantes com substituição cromossômica, distorção de segregação.

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“…At higher nitrogen levels, plant height and fresh weight of productive tillers increased. Plant height appears to be the major contributor to lodging tolerance (Chen et al, 2013;Kuczyńska et al, 2013;Ren et al, 2014). In previous study, lodging severity in shortstem varieties was very low and no significant variation was observed for yield and lodging scores while plant height was strongly correlated with lodging scores at all growth stages (Navabi et al, 2006).…”

Section: Resultsmentioning

confidence: 99%

“…Two forms of lodging in cereals are known, the first caused by stem fragility and the second by poor root development -thus indicating those factors needing to be adjusted (Ennos, 1991). Plant breeders, have reduced lodging risk by introducing dwarfing genes to produce shorter varieties (Chen et al, 2013;Kuczyńska et al, 2013;Ren et al, 2014) and by increasing stem strength (Ma, 2009), e.g., by higher starch accumulation (Kashiwagi et al, 2006). Structural carbohydrates (cellulose and lignin) should also play an important role for stem strength (Ma, 2009).…”

Section: Introductionmentioning

confidence: 99%

Spring barley stand structure as an indicator of lodging risk

Matušinsky¹,

Svobodová²,

Míša³

2015

Zemdirbyste-Agriculture

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Field experiments were performed in Kroměříž, Czech Republic in 2012-2014 and evaluated for spring barley comprising treatments which different sowing rates and nitrogen fertilization rates. The objective of this study was to determine parameters of stand structure in early (BBCH 39) growth stages of barley that would enable evaluation of lodging risk. Lodging was significantly affected by both year and nitrogen fertilization rate. Increased nitrogen fertilization rates demonstrably increased lodging. Higher fertilization rates manifested in increased tiller biomass weight, greater plant height, and smaller roots. Similarly, the protein content of harvested grain was strongly affected by year and nitrogen application rate. Higher fertilization rates also resulted in grain with higher protein content. Sowing density did not affect either lodging level or protein content. Yields were affected only by year. Increased tiller biomass weight and increased plant height during early growth stages are significant indicators of lodging risk. Correlation between lodging and tiller biomass and plant height was higher than 0.5 and statistically significant (P = 0.000).

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Molecular detection of QTL controlling plant height components in a doubled haploid barley population

Cited by 22 publications

References 28 publications

Identification of QTL underlying physiological and morphological traits of flag leaf in barley

Identification of QTL underlying physiological and morphological traits of flag leaf in barley

<b>Identification of QTL underlying agronomic, morphological and physiological traits in barley under rainfed conditions using SNP markers

Spring barley stand structure as an indicator of lodging risk

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