Quantitative trait loci for yield and yield components in an Oryza sativa×Oryza rufipogon BC2F2 population evaluated in an upland environment

Moncada, P.; Martínez, César; Borrero, Jaime; Châtel, Marc; Gauch, Hugh G.; Guimarães, E. P.; Tohmé, Joe; McCouch, Susan R.

doi:10.1007/s001220051616

Cited by 320 publications

(222 citation statements)

References 29 publications

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“…In addition to machine harvestability, blueberry bush morphological data could also be useful for crop management. For instance, plant size and growth rate can be indicative of vigor and yield potential [27,28]. A plant's size and shape will also influence the optimal layout for commercial cultivation [29], and blueberry in row spacing has been shown to correlate with yield [30].…”

Section: Discussionmentioning

confidence: 99%

High Throughput Phenotyping of Blueberry Bush Morphological Traits Using Unmanned Aerial Systems

Patrick

2017

Remote Sensing

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Phenotyping morphological traits of blueberry bushes in the field is important for selecting genotypes that are easily harvested by mechanical harvesters. Morphological data can also be used to assess the effects of crop treatments such as plant growth regulators, fertilizers, and environmental conditions. This paper investigates the feasibility and accuracy of an inexpensive unmanned aerial system in determining the morphological characteristics of blueberry bushes. Color images collected by a quadcopter are processed into three-dimensional point clouds via structure from motion algorithms. Bush height, extents, canopy area, and volume, in addition to crown diameter and width, are derived and referenced to ground truth. In an experimental farm, twenty-five bushes were imaged by a quadcopter. Height and width dimensions achieved a mean absolute error of 9.85 cm before and 5.82 cm after systematic under-estimation correction. Strong correlation was found between manual and image derived bush volumes and their traditional growth indices. Hedgerows of three Southern Highbush varieties were imaged at a commercial farm to extract five morphological features (base angle, blockiness, crown percent height, crown ratio, and vegetation ratio) associated with cultivation and machine harvestability. The bushes were found to be partially separable by multivariate analysis. The methodology developed from this study is not only valuable for plant breeders to screen genotypes with bush morphological traits that are suitable for machine harvest, but can also aid producers in crop management such as pruning and plot layout organization.

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Section: Discussionmentioning

confidence: 99%

High Throughput Phenotyping of Blueberry Bush Morphological Traits Using Unmanned Aerial Systems

Patrick

2017

Remote Sensing

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“…Indigenous and wild rice landraces harbour a number of favourable genes that are not expressed in the phenotype of their parents (Tanksley and McCouch 1997;Moncada et al 2001;Brondani et al 2006;Septiningsih et al 2003; Thomson et al 2007) and have been used as donor parent for different stress tolerance in a number of hybridization programmes. Osmotic stresses including drought and salinity with other adverse conditions are frequently encountered as constraint to rice production in most of the rice growing regions of Rarh Bengal (the lateritic south western districts of West Bengal).…”

Section: Introductionmentioning

confidence: 99%

Profiling of selected indigenous rice (Oryza sativa L.) landraces of Rarh Bengal in relation to osmotic stress tolerance

Karmakar

Roychowdhury

Kar

et al. 2012

Physiol Mol Biol Plants

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A total of ten rare indigenous rice landraces of West Bengal were screened for germination potential and seedling growth under varying concentrations of sodium chloride (NaCl) and polyethylene glycol (PEG) solutions as osmotic stress inducing agents. Among the studied rice landraces Kelas and Bhut Moori showed highest degree of tolerance to induced osmotic stresses. Proline content of the studied lines was also determined. Genetic relationship among the studied rice landraces was assessed with 22 previously reported osmotic stress tolerance linked Simple Sequence Repeat (SSR) markers. The identified allelic variants in form of amplified products size (molecular weight) for each SSR marker were documented to find out allele mining set for the linked markers of the studied genotypes in relation to osmotic stress tolerance. A Microsatellite Panel was constructed for the different allelic forms (size of amplified products) of each used marker. Among 22 SSR markers, ten showed unique alleles in form of single specific amplified product for the studied four genotypes which can be used for varietal identification. Genetic relationship among the studied rice lines was determined and a dendrogram was constructed to reveal their genetic inter-relationship. Polymorphism Information Content (PIC) for each used marker was also calculated for the studied rice lines.

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“…Since QTL detection is carried out in advanced backcross populations, problems associated with considerable phenotypic variation and linkage drag in interspecific crosses are reduced. So far, several reports on the application of the AB-QTL strategy are available for tomato Fulton et al 1997Fulton et al , 2000Fulton et al , 2002Bernacchi et al 1998); rice (Xiao et al 1996(Xiao et al , 1998Moncada et al 2001;Brondani et al 2002;Septiningsih et al 2003;Wu et al 2004); maize (Ho et al 2002); pepper (Rao et al 2003); wheat (Huang et al 2003andbarley (Pillen et al 2003, 2004;Matus et al 2003;Li et al 2004). The favourable effects of the wild barley accession ISR101-23 on yield in two barley feeding varieties recorded by Pillen et al (2003Pillen et al ( , 2004 encourage further investments in the development of AB-populations for the genetic exploitation of diverse exotic barley germplasms.…”

Section: Introductionmentioning

confidence: 99%

AB-QTL analysis in spring barley: II. Detection of favourable exotic alleles for agronomic traits introgressed from wild barley (H. vulgare ssp. spontaneum)

et al. 2006

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The objective of the present study was to identify favourable exotic Quantitative Trait Locus (QTL) alleles for the improvement of agronomic traits in the BC 2 DH population S42 derived from a cross between the spring barley cultivar Scarlett and the wild barley accession ISR42-8 (Hordeum vulgare ssp. spontaneum). QTLs were detected as a marker main effect and/or a marker · environment interaction effect (M · E) in a three-factorial ANOVA. Using field data of up to eight environments and genotype data of 98 SSR loci, we detected 86 QTLs for nine agronomic traits. At 60 QTLs the marker main effect, at five QTLs the M · E interaction effect, and at 21 QTLs both the effects were significant. The majority of the M · E interaction effects were due to changes in magnitude and are, therefore, still valuable for marker assisted selection across environments. The exotic alleles improved performance in 31 (36.0%) of 86 QTLs detected for agronomic traits. The exotic alleles had favourable effects on all analysed quantitative traits. These favourable exotic alleles were detected, in particular on the short arm of chromosome 2H and the long arm of chromosome 4H. The exotic allele on 4HL, for example, improved yield by 7.1%. Furthermore, the presence of the exotic allele on 2HS increased the yield component traits ears per m 2 and thousand grain weight by 16.4% and 3.2%, respectively. The present study, hence, demonstrated that wild barley does harbour valuable alleles, which can enrich the genetic basis of cultivated barley and improve quantitative agronomic traits.

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Quantitative trait loci for yield and yield components in an Oryza sativa×Oryza rufipogon BC2F2 population evaluated in an upland environment

Cited by 320 publications

References 29 publications

High Throughput Phenotyping of Blueberry Bush Morphological Traits Using Unmanned Aerial Systems

High Throughput Phenotyping of Blueberry Bush Morphological Traits Using Unmanned Aerial Systems

Profiling of selected indigenous rice (Oryza sativa L.) landraces of Rarh Bengal in relation to osmotic stress tolerance

AB-QTL analysis in spring barley: II. Detection of favourable exotic alleles for agronomic traits introgressed from wild barley (H. vulgare ssp. spontaneum)

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