scholarly journals Evaluation of the Ph‐3 gene‐specific marker developed for marker‐assisted selection of late blight‐resistant tomato

2016 ◽  
Vol 135 (5) ◽  
pp. 636-642 ◽  
Author(s):  
Ya‐Ying Wang ◽  
Chien‐Hua Chen ◽  
Annika Hoffmann ◽  
Yun‐Che Hsu ◽  
Shu‐Fen Lu ◽  
...  
Keyword(s):  
Late Blight ◽  
Marker Assisted Selection ◽  
Specific Marker ◽  
Selection Of

Marker-assisted selection of candidate bulls for progeny testing programmes

1990 ◽  
Vol 51 (1) ◽  
pp. 63-74 ◽  
Author(s):  
Y. Kashi ◽  
E. Hallerman ◽  
M. Soller
Keyword(s):  
Theoretical Analysis ◽  
Genetic Markers ◽  
Milk Production ◽  
Marker Assisted Selection ◽  
Specific Marker ◽  
Progeny Testing ◽  
Genetic Progress ◽  
Potential Benefits ◽  
Marker Alleles ◽  
Selection Of

ABSTRACTA theoretical analysis of the potential benefits of marker-assisted selection (MAS) of candidate bulls prior to entry into a young sire progeny testing programme was carried out. It is assumed that quantitative trait loci (QTL) affecting milk production have been mapped with respect to known genetic markers, and MAS is based on evaluation of elite sires in order to identify marker alleles in coupling to favourable or unfavourable QTL alleles. Candidate bulls, descendants of the elite sire will then be selected, prior to conventional progeny testing, on the basis of the marker alleles derived from the elite-sire ancestor.The analysis considers recombination between marker and QTL, the difficulty of tracing specific marker alleles from sire to progeny, and the expectation that MAS, in practice, will be implemented in the grandsons, rather than in the sons of elite sires. It is shown that MAS of candidate bulls, based on the use of a single diallelic marker in linkage to a QTL will have only a negligible effect on the rate of genetic progress. Increases of 15 to 20% in the rate of genetic gain, however, can be obtained by the use of single polyallelic markers, and increases of 20 to 30% can be obtained by utilizing haplotypes of diallelic or polyallelic markers.

scholarly journals Field Screening and Marker Assisted Selection of Late Blight Resistant Potato Lines

2018 ◽  
Vol 25 (5) ◽  
pp. 1-12
Author(s):  
Saiful Islam ◽  
Adeeba Raihan ◽  
A. S. M. Nahiyan ◽  
M. A. Siddique ◽  
Lutfur Rahman
Keyword(s):  
Late Blight ◽  
Marker Assisted Selection ◽  
Field Screening ◽  
Selection Of

scholarly journals Mapping QTL for spike fertility and related traits in two doubled haploid wheat (Triticum aestivum L.) populations

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Nicole Pretini ◽  
Leonardo S. Vanzetti ◽  
Ignacio I. Terrile ◽  
Guillermo Donaire ◽  
Fernanda G. González
Keyword(s):  
Doubled Haploid ◽  
Marker Assisted Selection ◽  
Triticum Aestivum L ◽  
Physiological Model ◽  
Yield Potential ◽  
Breeding Programs ◽  
Per Se ◽  
Genomic Regions ◽  
Fertility Traits ◽  
Selection Of

Abstract Background In breeding programs, the selection of cultivars with the highest yield potential consisted in the selection of the yield per se, which resulted in cultivars with higher grains per spike (GN) and occasionally increased grain weight (GW) (main numerical components of the yield). In this study, quantitative trait loci (QTL) for GW, GN and spike fertility traits related to GN determination were mapped using two doubled haploid (DH) populations (Baguette Premium 11 × BioINTA 2002 and Baguette 19 × BioINTA 2002). Results In total 305 QTL were identified for 14 traits, out of which 12 QTL were identified in more than three environments and explained more than 10% of the phenotypic variation in at least one environment. Eight hotspot regions were detected on chromosomes 1A, 2B, 3A, 5A, 5B, 7A and 7B in which at least two major and stable QTL sheared confidence intervals. QTL on two of these regions (R5A.1 and R5A.2) have previously been described, but the other six regions are novel. Conclusions Based on the pleiotropic analysis within a robust physiological model we conclude that two hotspot genomic regions (R5A.1 and R5A.2) together with the QGW.perg-6B are of high relevance to be used in marker assisted selection in order to improve the spike yield potential. All the QTL identified for the spike related traits are the first step to search for their candidate genes, which will allow their better manipulation in the future.

scholarly journals Molecular marker-assisted selection of the ae alleles in maize

2010 ◽  
Vol 9 (2) ◽  
pp. 1074-1084
Author(s):  
F. Chen ◽  
S.W. Zhu ◽  
Y. Xiang ◽  
H.Y. Jiang ◽  
B.J. Cheng
Keyword(s):  
Molecular Marker ◽  
Marker Assisted Selection ◽  
Selection Of

scholarly journals Development of KASP Markers for Germplasm Characterization and Fingerprinting Identification of Broccoli in China

2020 ◽  
Author(s):  
Yusen Shen ◽  
Jiansheng Wang ◽  
Huifang Yu ◽  
Xiaoguang Sheng ◽  
Zhenqing Zhao ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Marker Assisted Selection ◽  
Genetic Relationships ◽  
Cost Effective ◽  
Germplasm Characterization ◽  
2D Barcode ◽  
New Type ◽  
Generation Sequencing ◽  
Kasp Markers ◽  
Selection Of

Abstract Background: Broccoli (Brassica oleracea var. italica) is a vegetable widely cultivated in China. Many new-type broccoli cultivars were bred and developed by Chinese breeders during the recent three decades. However, the broccoli cultivar nomenclature and detailed information of genetic relationships among broccoli germplasms are unclear. Results: The present study identified millions of SNPs by next-generation sequencing of 23 representative broccoli lines. Through several steps of selection, 100 SNPs were successfully converted into KASP markers, and used to evaluate the genetic diversity, genetic relationship, and population structure of 392 broccoli accessions, which represent the mainly broccoli breeding materials in China. The initial, introduced and improved accessions were well clustered, though some accessions were overlapped between groups, probably reflecting the fact that breeding activities led to genetic similarities. To make the KASP genotyping more efficient and cost-effective, 25 of the 100 KASPs were selected for fingerprinting of all accessions, and the 2D barcode contained fingerprinting information were generated for elite varieties. Conclusion: The KASP markers developed in this study provided an efficient way for germplasm characterization, DNA fingerprinting, seed purity identification, and marker-assisted selection of broccoli in China.

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