QTL mapping of yield-associated traits in Brassica juncea: meta-analysis and epistatic interactions using two different crosses between east European and Indian gene pool lines

2012 ◽  
Vol 125 (7) ◽  
pp. 1553-1564 ◽  
Author(s):  
Satish Kumar Yadava ◽  
N. Arumugam ◽  
Arundhati Mukhopadhyay ◽  
Yashpal Singh Sodhi ◽  
Vibha Gupta ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Brassica Juncea ◽  
Gene Pool ◽  
Meta Analysis ◽  
Epistatic Interactions ◽  
East European

scholarly journals BjuWRR1, a CC-NB-LRR gene identified in Brassica juncea, confers resistance to white rust caused by Albugo Candida

2019 ◽  
Author(s):  
Heena Arora ◽  
K. Lakshmi Padmaja ◽  
Kumar Paritosh ◽  
Nitika Mukhi ◽  
A. K. Tewari ◽  
...  
Keyword(s):  
Genetic Transformation ◽  
Brassica Juncea ◽  
Gene Pool ◽  
Evolutionary Dynamics ◽  
Genomic Sequence ◽  
Oilseed Crop ◽  
R Gene ◽  
East European ◽  
Albugo Candida ◽  
White Rust

AbstractWhite rust caused by oomycete pathogen Albugo candida is a significant disease of crucifer crops including Brassica juncea (mustard), a major oilseed crop of the Indian subcontinent. Earlier a resistance-conferring locus named AcB1-A5.1 was mapped in an east European gene pool line of B. juncea – Donskaja-IV. This line was tested along with some other lines of B. juncea (AABB), B. rapa (AA) and B. nigra (BB) for resistance to six isolates of A. candida collected from different mustard growing regions of India. Donskaja-IV was found to be completely resistant to all the tested isolates. Sequencing of a BAC spanning the locus AcB1-A5.1 showed the presence of a single CC-NB-LRR protein encoding R gene. The genomic sequence of the putative R gene with its native promoter and terminator was used for the genetic transformation of a susceptible Indian gene pool line Varuna and was found to confer complete resistance to all the isolates. This is the first white rust resistance-conferring gene described from Brassica species and has been named BjuWRR1. Allelic variants of the gene in B. juncea germplasm and orthologues in the Brassicaceae genomes were studied to understand the evolutionary dynamics of the BjuWRR1 gene.HighlightBjuWRR1, a CNL type R gene, was identified from an east European gene pool line of Brassica juncea and validated for conferring resistance to white rust by genetic transformation.

Genetic dissection of seed weight by QTL analysis and detection of allelic variation in Indian and east European gene pool lines of Brassica juncea

2016 ◽  
Vol 130 (2) ◽  
pp. 293-307 ◽  
Author(s):  
Namrata Dhaka ◽  
Kadambini Rout ◽  
Satish K. Yadava ◽  
Yaspal Singh Sodhi ◽  
Vibha Gupta ◽  
...  
Keyword(s):  
Brassica Juncea ◽  
Qtl Analysis ◽  
Gene Pool ◽  
Seed Weight ◽  
Allelic Variation ◽  
Genetic Dissection ◽  
East European

scholarly journals Genetic Analysis of Heterosis for Yield Influencing Traits in Brassica juncea Using a Doubled Haploid Population and Its Backcross Progenies

2021 ◽  
Vol 12 ◽  
Author(s):  
Aakanksha ◽  
Satish Kumar Yadava ◽  
Bal Govind Yadav ◽  
Vibha Gupta ◽  
Arundhati Mukhopadhyay ◽  
...  
Keyword(s):  
Brassica Juncea ◽  
Doubled Haploid ◽  
Snp Array ◽  
Hybrid Breeding ◽  
Doubled Haploid Population ◽  
Data Sets ◽  
East European ◽  
Common Qtl ◽  
Backcross Hybrids ◽  
Multiple Trials

The exploitation of heterosis through hybrid breeding is one of the major breeding objectives for productivity increase in crop plants. This research analyzes the genetic basis of heterosis in Brassica juncea by using a doubled haploid (DH) mapping population derived from F1 between two heterotic inbred parents, one belonging to the Indian and the other belonging to the east European gene pool, and their two corresponding sets of backcross hybrids. An Illumina Infinium Brassica 90K SNP array-based genetic map was used to identify yield influencing quantitative trait loci (QTL) related to plant architecture, flowering, and silique- and seed-related traits using five different data sets from multiple trials, allowing the estimation of additive and dominance effects, as well as digenic epistatic interactions. In total, 695 additive QTL were detected for the 14 traits in the three trials using five data sets, with overdominance observed to be the predominant type of effect in determining the expression of heterotic QTL. The results indicated that the design in the present study was efficient for identifying common QTL across multiple trials and populations, which constitute a valuable resource for marker-assisted selection and further research. In addition, a total of 637 epistatic loci were identified, and it was concluded that epistasis among loci without detectable main effects plays an important role in controlling heterosis in yield of B. juncea.

QTL for maize grain yield identified by QTL mapping in six environments and consensus loci for grain weight detected by meta-analysis

2017 ◽  
Vol 136 (6) ◽  
pp. 820-833 ◽  
Author(s):  
Limei Pan ◽  
Zengqi Yin ◽  
Yaqun Huang ◽  
Jingtang Chen ◽  
Liying Zhu ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Grain Yield ◽  
Meta Analysis ◽  
Grain Weight ◽  
Maize Grain Yield ◽  
Maize Grain

scholarly journals Heterosis for the root distribution trait in common bean

2020 ◽  
Vol 43 ◽  
pp. e46712
Author(s):  
Sibila Grigolo ◽  
Rita Carolina de Melo ◽  
Ana Carolina da Costa Lara Fioreze ◽  
Altamir Frederico Guidolin ◽  
Jefferson Luís Meirelles Coimbra
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Abiotic Stresses ◽  
Gene Pool ◽  
Root Distribution ◽  
Environmental Changes ◽  
Phaseolus Vulgaris L ◽  
Epistatic Interactions ◽  
Genetic Studies ◽  
The Mean

Heterosis has been one of the most studied phenomena since genetic studies were conceived. Knowledge of this phenomenon for the root distribution trait in beans (Phaseolus vulgaris L.) can favour the development of genotypes that are more tolerant to abiotic stresses. This study aimed to verify the occurrence of heterosis for the root distribution trait in hybrid F1 populations of common bean derived from crosses within and between gene groups. Thirty-six populations (six parents and 30 hybrids) were evaluated under field conditions in the agricultural years 2016/17 and 2017/18. The root distribution was assessed with the adapted Bohm method. The genotypes responded similarly to environmental changes (absence of an interaction). However, the root distribution differed significantly between the agricultural years. Comparisons between the mean of hybrids from crosses within each gene pool and the mean of parents did not reveal heterosis. The comparisons between gene groups showed significant differences only between BRS Embaixador x IPR Uirapuru, CBS 14 x IPR Uirapuru, and BAF 53 x IPR Uirapuru and the mean of parents. The absence of heterosis in the root trait can be explained by the degree of kinship between the gene groups, as well as some epistatic interactions.

QTL mapping and analysis of epistatic interactions for grain yield and yield-related traits in Triticum turgidum L. var. durum

Euphytica ◽  
2017 ◽  
Vol 213 (12) ◽  
Author(s):  
Pablo F. Roncallo ◽  
Pavan C. Akkiraju ◽  
Gerardo L. Cervigni ◽  
Viviana C. Echenique
Keyword(s):  
Qtl Mapping ◽  
Grain Yield ◽  
Triticum Turgidum ◽  
Epistatic Interactions

Soybean plant height QTL mapping and meta-analysis for mining candidate genes

2017 ◽  
Vol 136 (5) ◽  
pp. 688-698 ◽  
Author(s):  
Zhengong Yin ◽  
Huidong Qi ◽  
Qingshan Chen ◽  
Zhanguo Zhang ◽  
Hongwei Jiang ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Candidate Genes ◽  
Plant Height ◽  
Meta Analysis ◽  
Soybean Plant

scholarly journals Dynamic Mapping Based on Single Segment Substitution Lines for Plant Height in Rice

2021 ◽  
Author(s):  
Yu Fu ◽  
Hongyuan Zhao ◽  
Jiongkai Huang ◽  
Haitao Zhu ◽  
Xin Luan ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Plant Height ◽  
Expression Patterns ◽  
Negative Effects ◽  
Substitution Lines ◽  
Epistatic Interactions ◽  
Single Segment ◽  
Conditional Qtl Mapping ◽  
Single Segment Substitution Lines ◽  
Segment Substitution

Abstract Background: Dynamic regulations of QTLs still remain mysterious. Single segment substitution lines and conditional QTL mapping, functional QTL mappings are ideal materials and methods to explore epistatic interactions, expression patterns and functions of QTLs for complex traits.Results: Based on single segment substitution lines five QTLs on plant height in rice were identified first in this paper, and then their epistatic interactions, expression patterns and functions were systemmatically studied by tailing after each QTL. Unconditional QTL mapping showed the five QTLs were with significant effects at one or more stages, all of which increased plant height except QTL1. They interacted each other as homeostatic mechanisms to regulate plant height with negative effects before 72d after transplanting and positive since then. Conditional QTL mapping revealed the expression quantities and periods for the five QTLs and their epistases. Temporal expression pattern was verified again by selective expressions of QTLs in specific periods. QTL1 expressed negatively while QTL2 and QTL4 positively, mainly occurring in the periods from 35 to 42d and from 49 to 56d after transplanting. Epistatic expressions were dispersedly in various periods, mainly with negative effects before 35d while positive since then. Functional QTL mapping discovered the five QTLs brought the inflexion point ahead of schedule, accelerated the growth and the degradation, and changed the peak of plant height, while their interactions had the opposite effects approximately. This paper uncovered the dynamic rules of five QTLs and their interactions on plant height systematically, which will be helpful to understand the genetic mechanism for developmental traits.Conclusions: Five single segment substitution lines were tested with significant additive, dominant and epistatic effects of QTLs on plant height. Additive and dominant expressions were mainly in two periods, while epistasis dispersedly. The five QTLs and their interactions significantly regulated the developmental trajectory of plant height.

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