Association Studies of Yield Contributing and Physiological Traits on Yield in Mungbean (Vigna radiata (L.) Wilczeck) under Summer Condition

2017 ◽  
Vol 8 (2) ◽  
pp. 257-260
Author(s):  
Sai Rekha ◽  
◽  
Mohan Reddy ◽  
Ravindra Reddy ◽  
◽  
...  
Keyword(s):  
Vigna Radiata ◽  
Association Studies ◽  
Physiological Traits ◽  
Summer Condition

scholarly journals Adaptive Traits to Improve Durum Wheat Yield in Drought and Crown Rot Environments

2020 ◽  
Vol 21 (15) ◽  
pp. 5260 ◽  
Author(s):  
Samir Alahmad ◽  
Yichen Kang ◽  
Eric Dinglasan ◽  
Elisabetta Mazzucotelli ◽  
Kai P. Voss-Fels ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Field Experiments ◽  
Triticum Turgidum ◽  
Association Studies ◽  
Wheat Yield ◽  
Crown Rot ◽  
Physiological Traits ◽  
Yield Potential ◽  
Genome Wide Association Studies ◽  
Stay Green

Durum wheat (Triticum turgidum L. ssp. durum) production can experience significant yield losses due to crown rot (CR) disease. Losses are usually exacerbated when disease infection coincides with terminal drought. Durum wheat is very susceptible to CR, and resistant germplasm is not currently available in elite breeding pools. We hypothesize that deploying physiological traits for drought adaptation, such as optimal root system architecture to reduce water stress, might minimize losses due to CR infection. This study evaluated a subset of lines from a nested association mapping population for stay-green traits, CR incidence and yield in field experiments as well as root traits under controlled conditions. Weekly measurements of normalized difference vegetative index (NDVI) in the field were used to model canopy senescence and to determine stay-green traits for each genotype. Genome-wide association studies using DArTseq molecular markers identified quantitative trait loci (QTLs) on chromosome 6B (qCR-6B) associated with CR tolerance and stay-green. We explored the value of qCR-6B and a major QTL for root angle QTL qSRA-6A using yield datasets from six rainfed environments, including two environments with high CR disease pressure. In the absence of CR, the favorable allele for qSRA-6A provided an average yield advantage of 0.57 t·ha−1, whereas in the presence of CR, the combination of favorable alleles for both qSRA-6A and qCR-6B resulted in a yield advantage of 0.90 t·ha−1. Results of this study highlight the value of combining above- and belowground physiological traits to enhance yield potential. We anticipate that these insights will assist breeders to design improved durum varieties that mitigate production losses due to water deficit and CR.

scholarly journals Genome Wide Association Studies for Four Physiological Traits in Groundnut (Arachis hypogaea L.) Minicore Collection

2019 ◽  
Author(s):  
Abdulwahab Saliu Shaibu ◽  
Clay Sneller ◽  
Babu N. Motagi ◽  
Jackline Chepkoech ◽  
Mercy Chepngetich ◽  
...  
Keyword(s):  
Marker Assisted Selection ◽  
Association Studies ◽  
Canopy Temperature ◽  
Snp Markers ◽  
Physiological Traits ◽  
Rapid Decline ◽  
Genome Wide Association Studies ◽  
Area Index ◽  
Trait Association ◽  
Genome Wide

Abstract Background In order to integrate genomics in breeding and development of drought tolerant groundnut genotypes, identification of genomic regions/genetic markers for drought surrogate traits is essential. We used SNP markers for a genetic analysis of the ICRISAT groundnut minicore collection for genome wide marker-trait association for some physiological traits and to determine the magnitude of linkage disequilibrium (LD) present in the genetic resources. Results The LD analysis showed that about 36% of loci pairs were in significant LD (P < 0.05 and r2 > 0.2) and 3.14% of the pairs were in complete LD. There was rapid decline in LD with distance and the LD was <0.2 at a distance of 41635 bp. The marker trait association (MTAs) studies revealed 20 significant MTAs (p <0.001) with 11 markers for leaf area index (4), canopy temperature (13), chlorophyll content (1) and NDVI (2). The markers explained 2 to 21% of the phenotypic variation observed. Most of the MTAs identified on the A subgenome were also identified on the respective homeologous chromosome on the B subgenome. The duplications of effect observed could be due to common ancestor of the A and B genome which explains the linkage detected between markers lying on different chromosomes seen in the current study. Conclusions The present study identified a total of 20 highly significant marker trait associations with 11 markers for four physiological traits of importance in groundnut; LAI, CT, SCMR and NDVI. The markers identified in this study can serve as useful genomic resources to initiate marker-assisted selection and trait introgression of groundnut for drought tolerance. The identified markers in this study may be useful for marker assisted selection after further validation.

scholarly journals Assessment of variability and association for seed yield and yield attributing traits among the interspecific derivatives of greengram x blackgram cross

2021 ◽  
Vol 13 (SI) ◽  
pp. 1-8
Author(s):  
S. Ragul ◽  
N. Manivannan ◽  
A. Mahalingam
Keyword(s):  
Seed Yield ◽  
Coefficient Of Variation ◽  
Vigna Radiata ◽  
Association Studies ◽  
Interspecific Cross ◽  
Vigna Mungo ◽  
Genetic Advance ◽  
Number Of Clusters ◽  
High Heritability ◽  
Derivatives Of

The present investigation was carried out with 24 progenies in F4 generation of interspecific cross derivatives of Vigna radiata cv. VBN(Gg)2 x Vigna mungo cv. Mash 114 to study the variability and association among the yield and the yield component traits. A set of 24 F4 progenies from the interspecific cross between greengram (VBN(Gg)2) and blackgram (Mash 114) formed the basic genetic material for the present investigation. Variability studies recorded high Phenotypic Coefficient of Variation (PCV) and Genotypic Coefficient of Variation (GCV) for the traits viz., number of branches/ plant, number of clusters/ plant, number of pods/ plant and seed yield /plant. High heritability (h2) along with high genetic advance as per cent of mean (GAM) were recorded for the traits, plant height, number of clusters/ plant, number of pods/ plant and seed yield/ plant. Association studies revealed that the trait number of pods/ plant alone recorded high direct positive effect on seed yield/ plant. The results indicated that high magnitude of variability was present among the interspecific progenies for these traits. The high heritability and genetic advance might be due to presence of additive gene action. Hence selection based on these traits might be effective for genetic improvement among the interspecific progenies of Vigna radiata x Vigna mungo. The study indicates that the trait, number of pods / plant should be given due importance in selection programme for seed yield improvement in the interspecific progenies of greengram and blackgram.

scholarly journals Diversity analysis of mungbean [Vigna radiata (L.) Wilczek] genotypes for bruchid resistance

2019 ◽  
Author(s):  
Sanhita Ghosh ◽  
Anindita Roy ◽  
Sabyasachi Kundagrami
Keyword(s):  
Vigna Radiata ◽  
Crop Improvement ◽  
Principal Component ◽  
Storage Condition ◽  
Physiological Traits ◽  
Callosobruchus Chinensis ◽  
Diversity Analysis ◽  
Nutritional Requirement ◽  
Total Production ◽  
Improvement Program

Mungbean [Vigna radiata (L.) Wilczek] is one of the most important pulse crops in the tropical and sub-tropical areas. Although the total production of mungbean is not enough to supplement the nutritional requirement, an additional issue further augments the concern of its use: the post-harvest damage in the storage condition. Bruchids (Callosobruchus chinensis) are major polyphagous storage pest that causes substantial losses, both quantitatively and qualitatively. The objective of the current study was to classify the fifty-two mungbean genotypes into groups based on their bruchid resistant and susceptibility by using multivariate statistical analysis. Since the present study emphasizes the progressive breeding program, the multivariate analysis is expected to effectively demonstrate the diversity of bruchid attack and therefore identify and ensures the correct representation of the resistant genotypes. The Principal Component Analysis (PCA) displays the correlation of bruchid morpho-physiological traits and the diversity analysis groups the considered genotypes into four clusters (I-IV). The cluster III contains seven genotypes which are observed most effective against bruchid attack. The PC1 shows 70.83% of variability where PC2 shows 29.17% of variability. PCA picturize the most positive correlation between the number of egg laid (NOEL-0.922) and percentage of seed damage (POSD-0.975) among all the morpho-physiological traits. The cluster III thus helps selecting resistant parents for hybridization in future crop improvement program.

scholarly journals Physiological Traits for Shortening Crop Duration and Improving Productivity of Greengram (Vigna radiata L. Wilczek) Under High Temperature

2019 ◽  
Vol 10 ◽  
Author(s):  
Partha Sarathi Basu ◽  
Aditya Pratap ◽  
Sanjeev Gupta ◽  
Kusum Sharma ◽  
Rakhi Tomar ◽  
...  
Keyword(s):  
High Temperature ◽  
Vigna Radiata ◽  
Physiological Traits

Effect of Different Levels of Coriander Oil on Broiler Performance and Some Physiological Traits under Summer Condition

2010 ◽  
Vol 10 (1) ◽  
pp. 10-14 ◽  
Author(s):  
Essa H. Al-Mashhad ◽  
Farah K. Al-Jaff ◽  
Sunbul J. Hamodi ◽  
Hanan E. Al-Mashhad
Keyword(s):  
Physiological Traits ◽  
Broiler Performance ◽  
Summer Condition ◽  
Different Levels

scholarly journals Genome-Wide Association Study of Morpho-Physiological Traits in Aegilops tauschii to Broaden Wheat Genetic Diversity

Plants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 211
Author(s):  
Mazin Mahjoob Mohamed Mahjoob ◽  
Yasir Serag Alnor Gorafi ◽  
Nasrein Mohamed Kamal ◽  
Yuji Yamasaki ◽  
Izzat Sidahmed Ali Tahir ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Bread Wheat ◽  
Association Studies ◽  
Aegilops Tauschii ◽  
Genome Wide Association ◽  
Physiological Traits ◽  
Genome Wide Association Studies ◽  
Genome Wide ◽  
Wide Range ◽  
Or Genes

Aegilops tauschii, the D-genome donor of bread wheat, is a storehouse of genetic diversity that can be used for wheat improvement. This species consists of two main lineages (TauL1 and TauL2) and one minor lineage (TauL3). Its morpho-physiological diversity is large, with adaptations to a wide ecological range. Identification of allelic diversity in Ae. tauschii is of utmost importance for efficient breeding and widening of the genetic base of wheat. This study aimed at identifying markers or genes associated with morpho-physiological traits in Ae. tauschii, and at understanding the difference in genetic diversity between the two main lineages. We performed genome-wide association studies of 11 morpho-physiological traits of 343 Ae. tauschii accessions representing the entire range of habitats using 34,829 DArTseq markers. We observed a wide range of morpho-physiological variation among all accessions. We identified 23 marker–trait associations (MTAs) in all accessions, 15 specific to TauL1 and eight specific to TauL2, suggesting independent evolution in each lineage. Some of the MTAs could be novel and have not been reported in bread wheat. The markers or genes identified in this study will help reveal the genes controlling the morpho-physiological traits in Ae. tauschii, and thus in bread wheat even if the plant morphology is different.

Sign in / Sign up

Export Citation Format

Share Document