Mapping quantitative trait loci for a common bean (Phaseolus vulgaris L.) ideotype

Genome ◽  
2003 ◽  
Vol 46 (3) ◽  
pp. 411-422 ◽  
Author(s):  
Aaron D Beattie ◽  
Jamie Larsen ◽  
Tom E Michaels ◽  
K Peter Pauls
Keyword(s):  
Molecular Markers ◽  
Quantitative Trait Loci ◽  
Phaseolus Vulgaris ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Phenotypic Selection ◽  
Phenotypic Variance ◽  
Phaseolus Vulgaris L ◽  
Trait Loci ◽  
Selection Of

Breeding a model plant that encompasses individual traits thought to enhance yield potential, known as ideotype breeding, has traditionally focused on phenotypic selection of plants with desirable morphological traits. Broadening this breeding method to the molecular level through the use of molecular markers would avoid the environmental interactions associated with phenotypic selection. A population of 110 F5 recombinant inbred lines (RILs), derived from the cross between WO3391 and 'OAC Speedvale', was used to develop a genetic linkage map consisting of 105 random amplified polymorphic DNA (RAPD), simple sequence repeat (SSR), and sequence-tagged site (STS) markers. The map has a total length of 641 cM distributed across 8 linkage groups (LGs). Five of them were aligned on the core linkage map of bean. Twenty-one quantitative trait loci (QTLs) were identified over three environments for eight agronomic and architectural traits previously defined for a bean (Phaseolus vulgaris L.) ideotype. The QTLs were mapped to seven LGs with several regions containing QTLs for multiple traits. At least one QTL was located for each trait and a maximum of four were associated with lodging. Total explained phenotypic variance ranged from 10.6% for hypocotyl diameter to 45.4% for maturity. Some of the QTLs identified will be useful for early generation selection of tall, upright, high-yielding lines in a breeding program.Key words: molecular markers, genetic map, plant architecture, yield.

scholarly journals Mapping Quantitative Trait Loci for Resistance to Fall Armyworm (Lepidoptera: Noctuidae) Leaf-Feeding Damage in Maize Inbred Mp705

2020 ◽  
Vol 113 (2) ◽  
pp. 956-963 ◽  
Author(s):  
E D Womack ◽  
W P Williams ◽  
J S Smith ◽  
M L Warburton ◽  
D Bhattramakki
Keyword(s):  
Molecular Markers ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Fall Armyworm ◽  
Phenotypic Variance ◽  
Feeding Damage ◽  
Artificial Infestation ◽  
Lepidopteran Insects ◽  
Trait Loci ◽  
Important Pest

Abstract The fall armyworm, Spodoptera frugiperda (J. E. Smith), is an agronomically important pest that severely limits maize (Zea mays (Linnaeus) [Poales: Poaceae]) production. This migrant insect devastates maize plants in many countries threatening the livelihood of millions. Quantitative trait loci (QTL) were mapped to identify chromosomal regions that control resistance to fall armyworm leaf-feeding and to identify molecular markers linked to the target loci for use in marker-assisted selection (MAS). A bi-parental mapping population, comprising 243 F2:3 families from the cross Mp705 (resistant) × Mp719 (susceptible), was evaluated for fall armyworm leaf-feeding damage under artificial infestation over 3 yr. A linkage map comprised of 1,276 single-nucleotide polymorphism and simple sequence repeat molecular markers was constructed. Quantitative trait loci analyses identified two major QTL in bins 4.06 and 9.03 that when combined, explained 35.7% of the phenotypic variance over all environments. Mp705 was responsible for the leaf-feeding damage reducing alleles for both large effect QTL and most of the small effect QTL identified in this study. The QTL identified in bin 9.03 co-locates with a previously identified QTL that controls resistance to leaf-feeding damage in maize by fall armyworm and other lepidopteran insects. The QTL in bin 4.06 is a new source of resistance identified in this study. Beneficial alleles derived from Mp705 for the application of an integrated QTL-MAS approach could accelerate breeding efforts to minimize fall armyworm leaf-feeding in maize.

scholarly journals Quantitative trait loci sequencing–derived molecular markers for selection of stem rot resistance in peanut

Crop Science ◽  
2020 ◽  
Vol 60 (4) ◽  
pp. 2008-2018
Author(s):  
Renjie Cui ◽  
Josh Clevenger ◽  
Ye Chu ◽  
Timothy Brenneman ◽  
Thomas G. Isleib ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Stem Rot ◽  
Trait Loci ◽  
Selection Of

Quantitative Trait Loci Associated with Bacterial Brown Spot in Phaseolus vulgaris L.

Crop Science ◽  
2007 ◽  
Vol 47 (4) ◽  
pp. 1344-1353 ◽  
Author(s):  
Felix Navarro ◽  
Paul Skroch ◽  
Geunhwa Jung ◽  
James Nienhuis
Keyword(s):  
Quantitative Trait Loci ◽  
Phaseolus Vulgaris ◽  
Quantitative Trait ◽  
Brown Spot ◽  
Phaseolus Vulgaris L ◽  
Trait Loci ◽  
Bacterial Brown Spot

scholarly journals Development of a Mesoamerican intra-genepool genetic map for quantitative trait loci detection in a drought tolerant × susceptible common bean (Phaseolus vulgaris L.) cross

2010 ◽  
Vol 29 (1) ◽  
pp. 71-88 ◽  
Author(s):  
Matthew W. Blair ◽  
Carlos H. Galeano ◽  
Eduardo Tovar ◽  
Monica C. Muñoz Torres ◽  
Alejandro Velasco Castrillón ◽  
...  
Keyword(s):  
Quantitative Trait Loci ◽  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Genetic Map ◽  
Quantitative Trait ◽  
Phaseolus Vulgaris L ◽  
Drought Tolerant ◽  
Trait Loci

scholarly journals Mapping Quantitative Trait Loci in the Woody Perennial Plant Genus Citrus

1995 ◽  
Author(s):  
Gloria A. Moore ◽  
Gozal Ben-Hayyim ◽  
Charles L. Guy ◽  
Doron Holland
Keyword(s):  
Molecular Markers ◽  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Cold Hardiness ◽  
Molecular Genetic ◽  
Citrus Fruit ◽  
Perennial Crop ◽  
Perennial Plant ◽  
Trait Loci

As is true for all crops, production of Citrus fruit is limited by traits whose characteristics are the products of many genes (i.e. cold hardiness). In order to modify these traits by marker aided selection or molecular genetic techniques, it is first necessary to map the relevant genes. Mapping of quantitative trait loci (QTLs) in perennial plants has been extremely difficult, requiring large numbers of mature plants. Production of suitable mapping populations has been inhibited by aspects of reproductive biology (e.g. incompatibility, apomixis) and delayed by juvenility. New approaches promise to overcome some of these obstacles. The overall objective of this project was to determine whether QTLs for environmental stress tolerance could be effectively mapped in the perennial crop Citrus, using an extensive linkage map consisting of various types of molecular markers. Specific objectives were to: 1) Produce a highly saturated genetic linkage map of Citrus by continuing to place molecular markers of several types on the map. 2) Exploiting recently developed technology and already characterized parental types, determine whether QTLs governing cold acclimation can be mapped using very young seedling populations. 3) Determine whether the same strategy can be transferred to a different situation by mapping QTLs influencing Na+ and C1- exclusion (likely components of salinity tolerance) in the already characterized cross and in new alternative crosses. 4) Construct a YAC library of the citrus genome for future mapping and cloning.

Construction of an RAPD linkage map and localization of QTLs for oleic acid level using recombinant inbreds in mustard (Brassica juncea)

Genome ◽  
2002 ◽  
Vol 45 (3) ◽  
pp. 467-472 ◽  
Author(s):  
R Sharma ◽  
R AK Aggarwal ◽  
R Kumar ◽  
T Mohapatra ◽  
R P Sharma
Keyword(s):  
Oleic Acid ◽  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Brassica Juncea ◽  
Quantitative Trait ◽  
Recombinant Inbred ◽  
Acid Level ◽  
Recombinant Inbred Lines ◽  
Phenotypic Variance ◽  
Trait Loci

RAPD markers were employed for construction of a linkage map and localization of QTLs for oleic acid level using a set of 94 recombinant inbred lines (RILs) of mustard (Brassica juncea L.) as a mapping population. Only 30% of the 235 random primers used were useful in terms of polymorphism detected and the reproducibility of those patterns. Normal Mendelian segregation was observed for the majority of the 130 markers obtained with 71 informative primers; only 13.1% deviated (P < 0.01) from the expected 1:1 ratio. One-hundred and fourteen markers were assigned to 21 linkage groups (LGs) covering a total length of 790.4 cM with an average distance of 6.93 cM between markers. Two quantitative trait loci (QTL) for oleic acid level were mapped to 14- and 10.6-cM marker intervals on two different LGs. Both loci together explained 32.2% of phenotypic variance. One major QTL explained 28.5% of the trait variance observed in this species.Key words: Brassica juncea, linkage map, oleic acid, quantitative trait loci, RAPD, recombinant inbred line.

scholarly journals A consensus linkage map for molecular markers and Quantitative Trait Loci associated with economically important traits in melon (Cucumis melo L.)

2011 ◽  
Vol 11 (1) ◽  
pp. 111 ◽  
Author(s):  
Aurora Diaz ◽  
Mohamed Fergany ◽  
Gelsomina Formisano ◽  
Peio Ziarsolo ◽  
José Blanca ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Quantitative Trait Loci ◽  
Linkage Map ◽  
Quantitative Trait ◽  
Cucumis Melo ◽  
Trait Loci ◽  
Cucumis Melo L

Quantitative Trait Loci for Susceptibility to Tapeworm Infection in the Red Flour Beetle

Genetics ◽  
2003 ◽  
Vol 165 (3) ◽  
pp. 1307-1315
Author(s):  
Daibin Zhong ◽  
Aditi Pai ◽  
Guiyun Yan
Keyword(s):  
Quantitative Trait Loci ◽  
Quantitative Trait ◽  
Genetic Basis ◽  
Life Cycles ◽  
Red Flour Beetle ◽  
Phenotypic Variance ◽  
Flour Beetle ◽  
Trait Loci ◽  
Host Ecology ◽  
Tapeworm Infection

Abstract Parasites have profound effects on host ecology and evolution, and the effects of parasites on host ecology are often influenced by the magnitude of host susceptibility to parasites. Many parasites have complex life cycles that require intermediate hosts for their transmission, but little is known about the genetic basis of the intermediate host's susceptibility to these parasites. This study examined the genetic basis of susceptibility to a tapeworm (Hymenolepis diminuta) in the red flour beetle (Tribolium castaneum) that serves as an intermediate host in its transmission. Quantitative trait loci (QTL) mapping experiments were conducted with two independent segregating populations using amplified fragment length polymorphism (AFLP) markers and randomly amplified polymorphic DNA (RAPD) markers. A total of five QTL that significantly affected beetle susceptibility were identified in the two reciprocal crosses. Two common QTL on linkage groups 3 and 6 were identified in both crosses with similar effects on the phenotype, and three QTL were unique to each cross. In one cross, the three main QTL accounted for 29% of the total phenotypic variance and digenic epistasis explained 39% of the variance. In the second cross, the four main QTL explained 62% of the variance and digenic epistasis accounted for only 5% of the variance. The actions of these QTL were either overdominance or underdominance. Our results suggest that the polygenic nature of beetle susceptibility to the parasites and epistasis are important genetic mechanisms for the maintenance of variation within or among beetle strains in susceptibility to tapeworm infection.

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