Genetic Diversity Studies in Cucurbits Using Molecular Tools

2011 ◽  
pp. 140-198 ◽  
Author(s):  
C Esteras ◽  
F Nuez ◽  
B Picó
Keyword(s):  
Genetic Diversity ◽  
Molecular Tools ◽  
Diversity Studies

scholarly journals Genetic diversity of high and low molecular weight glutenin subunits in Saharan bread and durum wheats from Algerian oases

2012 ◽  
Vol 48 (No. 1) ◽  
pp. 23-32 ◽  
Author(s):  
I. Bellil ◽  
M. Chekara Bouziani ◽  
D. Khelifi
Keyword(s):  
Genetic Diversity ◽  
Molecular Weight ◽  
Durum Wheat ◽  
Bread Wheat ◽  
Allelic Variation ◽  
Low Molecular Weight ◽  
Glutenin Subunits ◽  
Lmw Glutenin Subunits ◽  
Genotypic Identification ◽  
Diversity Studies

Saharan wheats have been studied particularly from a botanical viewpoint. Genotypic identification, classification and genetic diversity studies to date were essentially based on the morphology of the spike and grain. For this, the allelic variation at the glutenin loci was studied in a set of Saharan bread and durum wheats from Algerian oases where this crop has been traditionally cultivated. The high molecular weight and low molecular weight glutenin subunit composition of 40 Saharan bread and 30 durum wheats was determined by SDS-PAGE. In Saharan bread wheats 32 alleles at the six glutenin loci were detected, which in combination resulted in 36 different patterns including 17 for HMW and 23 for LMW glutenin subunits. For the Saharan durum wheats, 29 different alleles were identified for the five glutenin loci studied. Altogether, 29 glutenin patterns were detected, including 13 for HMW-GS and 20 for LMW-GS. Three new alleles were found in Saharan wheats, two in durum wheat at the Glu-B1 and Glu-B3 loci, and one in bread wheat at the Glu-B1 locus. The mean indices of genetic variation at the six loci in bread wheat and at the five loci in durum wheat were 0.59 and 0.63, respectively, showing that Saharan wheats were more diverse. This information could be useful to select Saharan varieties with improved quality and also as a source of genes to develop new lines when breeding for quality.

scholarly journals The new use of Sorghum bicolor-derived SSR markers to evaluate genetic diversity in 17 Australian Sorghum species

2005 ◽  
Vol 3 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Sally L. Dillon ◽  
Peter K. Lawrence ◽  
Robert J. Henry
Keyword(s):  
Genetic Diversity ◽  
Sorghum Bicolor ◽  
Ssr Markers ◽  
Diversity Indices ◽  
Basic Knowledge ◽  
Apparent Lack ◽  
Breeding Programmes ◽  
Diversity Studies ◽  
Potential Use ◽  
Simple Sequence

The Sorghum genus is extremely diverse both morphologically and geographically, however, relatively few of the 25 recognized species have been evaluated genetically. The apparent lack of basic knowledge pertaining to the levels of genetic diversity both within and between the 17 Australian wild species is a major obstacle to both their effective conservation and potential use in breeding programmes. Twelve Sorghum bicolor-derived simple sequence repeat (SSR) markers were evaluated for cross-species amplification in all 25 Sorghum species. The SSR markers were highly polymorphic, with diversity indices ranging from 0.59 to 0.99 with mean of 0.91. Five markers combined were able to differentiate 24 of the 25 Sorghum species, with intra-species polymorphism apparent. Sorghum bicolor-derived SSRs have proven to be an efficient source of markers for genetic diversity studies of the relatively poorly characterized Australian indigenous Sorghum species.

scholarly journals Review: Genetic diversity studies using microsatellite markers and their contribution in supporting sustainable sheep breeding programs

2017 ◽  
Vol 1 (01) ◽  
pp. 46-51
Author(s):  
OUMER SHERIFF ◽  
KEFYALEW ALEMAYEHU
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Polymorphic Information Content ◽  
Domestic Sheep ◽  
Breeding Programs ◽  
Sheep Breeding ◽  
Population Structures ◽  
The Mean ◽  
Tree Building ◽  
Diversity Studies

Sheriff O, Alemayehu K. 2017. Review: Genetic diversity studies using microsatellite markers and their contribution in supporting sustainable sheep breeding programs. Asian J Agric 1: 46-51. Microsatellites have been widely accepted and employed as useful molecular markers for measuring genetic diversity and divergence within and among populations. The various parameters developed so far to measure genetic diversity within and among populations are observed and expected heterozygosities (Ho and He), the mean number of alleles per locus (MNA),polymorphic information content (PIC), genetic distance and phylogenetic or tree building approach.The objective of thisreview was therefore to quantifythe genetic diversity studies of domestic sheep populations using microsatellite markersand their contribution in supporting sustainable sheep breeding programs. From the review, it is possible to see that there was high within population genetic variations in all the studied sheep populations, poor level of population differentiations and high levels of inbreeding. On the other hand, low estimates of hetrozygosities and mean number of alleles and employing only few and weak markers were observed in some of the studies. The gaps observed in the previous genetic diversity studies of the sheep populations may demand further works to reveal more information on the population structures andto start appropriate and sustainable breeding programs.

scholarly journals Genetic diversity studies for morphological traits in pearl millet (Pennisetum glaucum L.) landraces of Northern Nigeria

2019 ◽  
Vol 7 (2) ◽  
pp. 060-070
Author(s):  
Abdulhakeem Abubakar ◽  
Olamide Ahmed Falusi ◽  
Matthew Omoniyi Adebola ◽  
Oladipupo Abdulazeez Yusuf Daudu
Keyword(s):  
Genetic Diversity ◽  
Pearl Millet ◽  
Morphological Traits ◽  
Pennisetum Glaucum ◽  
Northern Nigeria ◽  
Diversity Studies

scholarly journals Genetic diversity studies in finger millet: Eleusine coracana L. Gaertn

2021 ◽  
Vol 9 (1) ◽  
pp. 662-665
Author(s):  
B Sirisha Rani ◽  
Suresh Babu G ◽  
Abhilash PV ◽  
B Jalandhar Ram
Keyword(s):  
Genetic Diversity ◽  
Finger Millet ◽  
Eleusine Coracana ◽  
Diversity Studies

scholarly journals Genetic Diversity Studies in MAGIC Population of Soybean (Glycine max (L.) Merrill) Based on Mahalanobis D2 Distance

2021 ◽  
pp. 18-25
Author(s):  
Bidush Ranjan Swar ◽  
V. Swarnalatha ◽  
M. Rajendar Reddy ◽  
S. Vanisree
Keyword(s):  
Genetic Diversity ◽  
Seed Weight ◽  
Quantitative Traits ◽  
Genetic Recombination ◽  
Breeding Programs ◽  
Total Genetic Diversity ◽  
Glycine Max L ◽  
Diversity Studies ◽  
100 Seed Weight ◽  
Number Of Branches

Soybean MAGIC lines are highly variable breeding material which utilizes both recent and historic genetic recombination events. Present investigation was carried out to assess the genetic diversity present among 95 soybean MAGIC lines along with six checks for 10 different quantitative traits. All the genotypes were grouped into 16 clusters by performing Tocher’s clustering method using Mahalanobis D2 distance. Cluster I was the largest comprising of 30 genotypes followed by cluster II (23 genotypes), cluster X (15 genotypes) and cluster IX (9 genotypes). The maximum genetic distance (D2) was observed between cluster XI and XV (168.37) followed by cluster III and XV (164.3), cluster X and XV (149.64) as well as between cluster XII and cluster XVI (145.99). The cluster mean for most of the traits were high in cluster I and cluster XVI. Oil content contributed maximum (23.86%) towards total genetic diversity followed by number of pods plant-1 (18.97%), seed yield plant-1 (18.63%), 100 seed weight (11.05%) and number of branches plant-1 (10.16%) traits. The soybean MAGIC lines belong to the cluster XI (6-120) and cluster XV (6-30, 6-31, 6-5) were found to be the most divergent hence can be utilised in the recombination breeding programs to exploit maximum heterosis.

scholarly journals Assessment of Genetic Diversity and Population Structure of Some Soft and Hard Wheat Varieties Based on SSR Marker

2020 ◽  
Vol 8 (3) ◽  
pp. 80-87
Author(s):  
Yousif M. Fattah ◽  
Nergiz N. Tayib
Keyword(s):  
Genetic Diversity ◽  
Gene Diversity ◽  
Polymorphic Information Content ◽  
Triticum Aestivum L ◽  
Wheat Varieties ◽  
Discriminating Power ◽  
Triticum Spp ◽  
Cultivated Species ◽  
The Common ◽  
Diversity Studies

Wheat (Triticum spp.) is one of the most important cereal crops in Iraq and the world. It includes many species and varieties.  The two major cultivated species of wheat are, durum wheat (Tritium durum Desf.) which is tetraploid (2n= 28) and the common wheat (Triticum aestivum L.) which is hexaploid (2n = 42). Ten wheat varieties from both species were examined using ten Simple   sequence repeat (SSR) markers (WMC17, WMC20, WMC21, WMC24, WMC25, WMC48, WMC50, WMC283, Xgwm11 and Xgwm626). Various genetic parameters were calculated using Power Marker V3.25 software. A total of 156 alleles were detected in both species. The gene diversity in wheat varieties from both species collectively varied from 0.85 to 1.00, which indicates considerable genetic diversity in the examined varieties. All markers used in this study were highly informative and the polymorphic information content (PIC) values were higher than 0.50 in all loci. Hence all markers are considered useful for genetic diversity studies in wheat’s populations. The dendrogram separated the populations into two main clades and many subgroups. Azadi variety was simplicifolious. This study confirms the discriminating power of SSR typing and its usefulness for comparison within hard and soft wheat populations. 

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