QTL Mapping for Grain Yield, Flowering Time, and Stay‐Green Traits in Sorghum with Genotyping‐by‐Sequencing Markers

Sukumaran, Sivakumar; Li, Xianran; Zhu, Changxiang; Bai, Guihua; Perumal, Ramasamy; Tuinstra, Mitchell R.; Prasad, P. V. Vara; Mitchell, Sharon E.; Tesso, Tesfaye; Yu, Jianming

doi:10.2135/cropsci2015.02.0097

Cited by 59 publications

(47 citation statements)

References 102 publications

(176 reference statements)

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“…As is commonly observed in populations derived from converted tropical sorghum accessions, transgressive segregation for plant height and days to anthesis was observed in RIL entries from both populations (Young, 1996). The relatively high heritability estimates for plant height (0.78–0.94) and days to anthesis (0.53–0.89) were expected and are in agreement with previous reports for these traits in sorghum (Srinivas et al, 2009; Zou et al, 2012; Sukumaran et al, 2016).…”

Section: Resultssupporting

confidence: 92%

“…Ranges for phenotypic values of the F 4:5 RILs along with broad-sense heritability of each trait are shown. relatively high heritability estimates for plant height (0.78-0.94) and days to anthesis (0.53-0.89) were expected and are in agreement with previous reports for these traits in sorghum (Srinivas et al, 2009;Zou et al, 2012;Sukumaran et al, 2016).…”

Section: Plant Height and Days To Anthesissupporting

confidence: 92%

“…Similarly, a height QTL on chromosome 9 in the BTx623 × SC414‐12E population mapped to the known position of height locus Dw1 at ∼57 Mb (Brown et al, 2008; Morris et al, 2013). Of the QTL identified for days to anthesis in this study, only one QTL on chromosome 9 (57.42–58.36 Mbp) overlapped with the known QTL SbFL9.1 (∼58 Mbp) and qFT9.1 (∼46–74.61 Mbp) reported by Higgins et al (2014) and Sukumaran et al (2016), respectively. The QTL for days to anthesis identified in several studies on chromosome 3 at ∼1.7 Mbp (Srinivas et al, 2009; El Mannai et al, 2012) did not colocalize with a flowering time locus in the present investigation.…”

Section: Discussionmentioning

confidence: 63%

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Quantitative Trait Loci Associated with Anthracnose Resistance in Sorghum

et al. 2017

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S orghum [Sorghum bicolor (L.) Moench] is a major cereal crop grown on nearly 42 million ha worldwide for food, fodder, fiber, and fuel (FAOSTAT, 2013). It serves as a staple food crop for millions of people, predominantly in developing countries of Africa and Asia. Among the cereals, sorghum displays exceptional tolerance to heat and drought, and its complex biochemical and morphological characteristics offers an advantage of enhanced C4 carbon assimilation even at high temperatures (Paterson, 2008;Shoemaker et al., 2010). These characteristics make sorghum an attractive crop in both subsistence-and commercial-farming operations. However, a number of biotic and abiotic stresses are known An additional major QTL on chromosome 5 of the SC414-12E genome explained from 20 to 39% of the phenotypic variance and was observed in four of the six environments tested.Resequencing of the genomes of resistant cultivars SC155-14E and SC414-12E facilitated a preliminary survey of the coding regions of genes annotated as playing a role in host defense. The resequenced genomes of the resistant genotypes and the linkage mapping resources represent information relevant for more detailed molecular characterization of genes conditioning anthracnose resistance in this tropical cereal. The identification of QTL conferring anthracnose resistance and the identification of single-nucleotide polymorphisms linked to these loci will provide the necessary molecular tools for markerassisted introgression of durable anthracnose resistance into elite sorghum inbreds.

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Section: Resultssupporting

confidence: 92%

Section: Plant Height and Days To Anthesissupporting

confidence: 92%

Section: Discussionmentioning

confidence: 63%

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Quantitative Trait Loci Associated with Anthracnose Resistance in Sorghum

et al. 2017

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“…Overlapping QTLs for the chlorophyll fluorescence parameters and plant water status traits were identified in sunflower under drought stress (Kiani et al, 2008). QTLs for transpiration ratio were also associated with leaf area and biomass (Kapanigowda et al, 2014) and QTLs for chlorophyll content co-localized with flowering time in sorghum (Mace et al, 2012; Sukumaran et al, 2016). QTLs for relative water content, normalized difference vegetation index, and chlorophyll content were co-localized in creeping bentgrass (Merewitz et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

“…Alterations in chlorophyll fluorescence parameters have been used to evaluate plant drought tolerance (Maury et al, 1996; Li et al, 2006; O'Neill et al, 2006; Luo et al, 2011; Roostaei et al, 2011). Several QTLs for chlorophyll fluorescence have been identified in different plant species under drought stress (Yang et al, 2007; Kiani et al, 2008; De Miguel et al, 2014; Sukumaran et al, 2016). For example, a large number of QTLs for chlorophyll fluorescence parameters were detected in Pinus pinaster under drought stress, which cumulatively explained up to 44% of the observed phenotypic variance (De Miguel et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Quantitative Trait Loci Associated with Drought Tolerance in Brachypodium distachyon

Jiang

Wang

et al. 2017

Front. Plant Sci.

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The temperate wild grass Brachypodium distachyon (Brachypodium) serves as model system for studying turf and forage grasses. Brachypodium collections show diverse responses to drought stress, but little is known about the genetic mechanisms of drought tolerance of this species. The objective of this study was to identify quantitative trait loci (QTLs) associated with drought tolerance traits in Brachypodium. We assessed leaf fresh weight (LFW), leaf dry weight (LDW), leaf water content (LWC), leaf wilting (WT), and chlorophyll fluorescence (Fv/Fm) under well-watered and drought conditions on a recombinant inbred line (RIL) population from two parents (Bd3-1 and Bd1-1) known to differ in their drought adaptation. A linkage map of the RIL population was constructed using 467 single nucleotide polymorphism (SNP) markers obtained from genotyping-by-sequencing. The Bd3-1/Bd1-1 map spanned 1,618 cM and had an average distance of 3.5 cM between adjacent single nucleotide polymorphisms (SNPs). Twenty-six QTLs were identified in chromosome 1, 2, and 3 in two experiments, with 14 of the QTLs under well-watered conditions and 12 QTLs under drought stress. In Experiment 1, a QTL located on chromosome 2 with a peak at 182 cM appeared to simultaneously control WT, LWC, and Fv/Fm under drought stress, accounting for 11–18.7% of the phenotypic variation. Allelic diversity of candidate genes DREB2B, MYB, and SPK, which reside in one multi-QTL region, may play a role in the natural variation in whole plant drought tolerance in Brachypodium. Co-localization of QTLs for multiple drought-related traits suggest that the gene(s) involved are important regulators of drought tolerance in Brachypodium.

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Genetic analysis of stay‐green, yield, and agronomic traits in spring wheat

et al. 2020

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Hard red spring wheat (Triticum aestivum L.) grown in rainfed environments in the northern Great Plains of North America frequently encounter drought and heat stress during grain-fill, thus reducing yield. Delayed leaf senescence after heading, known as the stay-green trait, has been found to help spring wheat tolerate drought and heat stress during grain-fill. To better understand how the staygreen trait relates to expression of other agronomic traits, data was analyzed from a recombinant inbred line (RIL) population derived from a 'Vida'/MTHW0202 cross grown in rainfed and irrigated environments. The genetic architecture controlling traits measured in this study were also examined. Results found the stay-green trait was significantly correlated to overall yield (P < .001, r = .37) in rain-fed environments, but was not significantly correlated to yield (P = .26, r = .09) in irrigated environments. Three quantitative trait loci (QTL) located on chromosomes 2D, 4A, and 4D were associated with the stay-green trait. The 4A stay-green QTL, previously designated QGfd.mst-4A, was collocated with QTL for seed number per head, thousand kernel weight, and heading date. The 4D staygreen QTL overlaps the Rht-D1 plant height gene, and the allele prolonging the stay-green period co-segregates with the wild-type (tall) Rht-D1a allele. Results from this study provide a better understanding of the relationship between staygreen and agronomic traits in rainfed vs. irrigated environments. Additionally, understanding the genetic architecture controlling stay-green and agronomic traits will aid in selecting future drought-tolerant spring wheat varieties. 1 INTRODUCTION Drought and heat stress during hard red spring wheat (Triticum aestivum L.) grain-fill decreases yield in rain-Abbreviations: cM, centimorgan; GLDAH, green leaf duration after heading; QTL, quantitative trait loci; RIL, recombinant inbreed lines; SNP, single nucleotide polymorphism; SSD, single seed descent. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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QTL Mapping for Grain Yield, Flowering Time, and Stay‐Green Traits in Sorghum with Genotyping‐by‐Sequencing Markers

Cited by 59 publications

References 102 publications

Quantitative Trait Loci Associated with Anthracnose Resistance in Sorghum

Quantitative Trait Loci Associated with Anthracnose Resistance in Sorghum

Quantitative Trait Loci Associated with Drought Tolerance in Brachypodium distachyon

Genetic analysis of stay‐green, yield, and agronomic traits in spring wheat

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