scholarly journals Exploring the tertiary gene pool of bread wheat: sequence assembly and analysis of chromosome 5MgofAegilops geniculata

2015 ◽  
Vol 84 (4) ◽  
pp. 733-746 ◽  
Author(s):  
Vijay K. Tiwari ◽  
Shichen Wang ◽  
Tatiana Danilova ◽  
Dal Hoe Koo ◽  
Jan Vrána ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Gene Pool ◽  
Sequence Assembly ◽  
Tertiary Gene Pool

scholarly journals Albinism in F1 Hybrids Hinders Geneflow Between Cultivated Chickpea (Cicer arietinum L.) and the Tertiary Gene Pool Species, Cicer Pinnatifidum

2021 ◽  
Author(s):  
Shivali Sharma ◽  
Shivaji Ajinath Lavale ◽  
Benjamin Kilian
Keyword(s):  
Gene Pool ◽  
Genetic Factors ◽  
Embryo Rescue ◽  
F1 Hybrids ◽  
Interspecific Crosses ◽  
Seed Formation ◽  
Albino Phenotype ◽  
Tertiary Gene Pool ◽  
Chickpea Cultivars

Abstract Wild Cicer species, especially those in the tertiary gene pool, carry useful alleles for chickpea improvement. The aim of this study was to evaluate the crossability and geneflow between three chickpea cultivars (as female parents) and four cross-incompatible Cicer pinnatifidum accessions (as pollen parents) from the tertiary gene pool. Ten crosses were conducted. One fully developed healthy F1 seed was harvested in vivo from the ICC 4958 × ICC 17269 cross, but the seedling developed an albino phenotype at 4–5 days after germination. Unlike other crosses, those involving the cultivar ICCV 96030 generated a large number of pods with comparatively large ovules. One albino plantlet was obtained from the ICCV 96030 × ICC 17269 cross by embryo rescue. Crosses involving ICCV 10 resulted in flower drop and poor pod set. These variable genotype-specific responses of pod, ovule, and seed development indicate that genetic factors affect the formation of interspecific hybrids. Although pod and seed formation in these interspecific crosses can be improved, geneflow between these materials is hindered by a strong genetic factor conferring albinism in the F1 hybrids.

Use of the Durum Wheat Gene Pool in Breeding of Spring Bread Wheat

2020 ◽  
Vol 46 (5) ◽  
pp. 432-436
Author(s):  
S. N. Sibikeev ◽  
A. E. Druzhin ◽  
E. I. Gultyaeva ◽  
A. A. Yankovskaya
Keyword(s):  
Durum Wheat ◽  
Bread Wheat ◽  
Gene Pool ◽  
Spring Bread Wheat ◽  
Wheat Gene

A breeding strategy targeting the secondary gene pool of bread wheat: introgression from a synthetic hexaploid wheat

2019 ◽  
Vol 132 (8) ◽  
pp. 2285-2294 ◽  
Author(s):  
Ming Hao ◽  
Lianquan Zhang ◽  
Laibin Zhao ◽  
Shoufen Dai ◽  
Aili Li ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Gene Pool ◽  
Breeding Strategy ◽  
Synthetic Hexaploid Wheat ◽  
Synthetic Hexaploid

USE OF DURUM WHEAT GENE POOL IN BREEDING OF SPRING BREAD WHEAT

2020 ◽  
pp. 10-13
Author(s):  
S.N. SIBIKEEV ◽  
◽  
A.E. DRUZHIN ◽  
E.I. GULTYAEVA ◽  
A.A. YANKOVSKAYA ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Bread Wheat ◽  
Gene Pool ◽  
Spring Bread Wheat ◽  
Wheat Gene

Distribution of downy mildew (Bremia lactucaeRegel) resistances in a genebank collection of lettuce and its wild relatives

2011 ◽  
Vol 11 (1) ◽  
pp. 15-25 ◽  
Author(s):  
R. van Treuren ◽  
A. J. M. van der Arend ◽  
J. W. Schut
Keyword(s):  
Downy Mildew ◽  
Wild Species ◽  
Gene Pool ◽  
Crop Improvement ◽  
Northern Asia ◽  
Large Numbers ◽  
Related Wild Species ◽  
Overall Resistance ◽  
Tertiary Gene Pool ◽  
Genebank Collection

Genebanks serve as a rich source of diversity that can be exploited for crop improvement. However, large numbers of accessions usually have to be evaluated to find material with the characters of interest, and therefore, enhanced trait information can facilitate the more efficient selection of accessions by users. In this study, we report on the distribution of resistances to 28 races of downy mildew among 1223 genebank accessions of cultivated lettuce (Lactuca sativaL.) and 14 related wild species. Due to modern plant breeding, the overall level of resistance of cultivars released after 1950 appears to have increased two- to three-fold compared with varieties from earlier periods. Although fully resistant reactions could be observed among the accessions of cultivated lettuce for each of the 28 investigated races, the resistance probability was more than two-fold higher on average for accessions from the wild gene pool. In general, species of the primary gene pool appeared less resistant than those of the secondary or tertiary gene pool. Probabilities for examinedLactucaspecies ranged from 0.29 forL. serriolato 1.00 forL. perenniscompared with 0.19 for cultivated lettuce, with lower overall resistance probabilities observed only forL. altaica,L. dregeanaandL. tenerrima. ForL. serriola, the closest relative of cultivated lettuce and the wild species with the highest number of examined accessions, resistance probabilities to each of the investigated downy mildew races were relatively high for populations originating from Eastern Europe and Northern Asia.

scholarly journals High-density SNP genotyping array for hexaploid wheat and its secondary and tertiary gene pool

2015 ◽  
Vol 14 (5) ◽  
pp. 1195-1206 ◽  
Author(s):  
Mark O. Winfield ◽  
Alexandra M. Allen ◽  
Amanda J. Burridge ◽  
Gary L. A. Barker ◽  
Harriet R. Benbow ◽  
...  
Keyword(s):  
Hexaploid Wheat ◽  
Gene Pool ◽  
High Density ◽  
Snp Genotyping ◽  
Genotyping Array ◽  
Tertiary Gene Pool

Chromosome Rearrangements Caused by Double Monosomy in Wheat-Barley Group-7 Substitution Lines

2018 ◽  
Vol 154 (1) ◽  
pp. 45-55 ◽  
Author(s):  
Tatiana V. Danilova ◽  
Bernd Friebe ◽  
Bikram S. Gill ◽  
Jesse Poland ◽  
Eric Jackson
Keyword(s):  
Interspecific Hybridization ◽  
Gene Pool ◽  
Driving Forces ◽  
Introgressive Hybridization ◽  
Wheat Chromosome ◽  
Chromosome Rearrangements ◽  
Substitution Lines ◽  
Hordeum Vulgare L ◽  
Wheat Group ◽  
Tertiary Gene Pool

Interspecific or introgressive hybridization is one of the driving forces in plant speciation, producing allopolyploids or diploids with rearranged genomes. The process of karyotype reshaping following homoploid interspecific hybridization has not been studied experimentally. Interspecific hybridization is widely used in plant breeding to increase genetic diversity and introgress new traits. Numerous introgression stocks were developed for hexaploid wheat Triticum aestivum L. (2n = 6x = 42, genome AABBDD). Double monosomic lines, containing one alien chromosome from the tertiary gene pool of wheat and one homoeologous wheat chromosome, represent a simplified model for studying chromosome rearrangements caused by interspecific hybridization. The pairing of a chromosome from the tertiary gene pool with a wheat homoeologue is restricted by the activity of the wheat Ph1 gene, thus, rearrangements caused by chromosome breakage followed by the fusion of the broken arms can be expected. We analyzed chromosome aberrations in 4 sets of lines that originated from double monosomics of barley (Hordeum vulgare L.) chromosome 7H and wheat group-7 chromosomes with dicentric or ring chromosomes. The dynamics of wheat-barley dicentric chromosomes during plant development was followed and an increased diversity of rearrangements was observed. Besides the targeted group-7 chromosomes, other wheat chromosomes were involved in rearrangements, as chromosomes broken in the centromeric region fused with other broken chromosomes. In some cells, multi-centric chromosomes were observed. The structure and dosage of the introgressed barley chromatin was changed. The transmission of the rearrangements to the progenies was analyzed. The observed aberrations emphasize the importance of cytogenetic screening in gene introgression projects.

scholarly journals Estimation of the gene pool of the CIMMYT collection winter bread wheat on presence of the Lr 34 gene

2021 ◽  
pp. 15-20
Author(s):  
N. N. Vozhzhova ◽  
О. S. Zhogaleva ◽  
А. Yu. Dubina ◽  
N. T. Kupreyshvili ◽  
T. G. Derova ◽  
...  
Keyword(s):  
Molecular Marker ◽  
Resistance Gene ◽  
Bread Wheat ◽  
Gene Pool ◽  
Leaf Rust Resistance ◽  
Brown Rust ◽  
Wheat Varieties ◽  
Winter Bread Wheat ◽  
Three Samples ◽  
Moderately Resistant

Nowadays in Russia and in the world, the problem of improving food security is becoming more and more urgent. One of the main crops grown worldwide is winter bread wheat. Varieties resistant to main leaf diseases can produce large grain yields. Thus, the study and identification of resistance genes are of great importance. The purpose of the current work was to estimate the gene pool of winter bread wheat from the CIMMYT collection (Mexico) according to the age brown rust Lr 34 resistance gene. In the study of collection samples, there have been used such methods as DNA extraction using CTAB, PCR, electrophoresis on agarose gels. As a result of the study, there has been identified a presence of a functional allele of the Lr 34 gene in 146 winter bread wheat samples out of 411 studied ones (sets 20th IWWYT-SA, 21th IWWYT-IRR, 25th FAWWON-IRR, 25th FAWWON-SA). There have been identified three samples with a heterozygous allelic state of the Lr 34 gene. There have been identified 232 samples with the non-functional Lr 34 gene allele. 30 winter bread wheat samples had no amplification of DNA fragments with the molecular marker csLV34, which means a significant microsatellite sequence variability for which the molecular marker was developed in their genotype. 121 out of 146 winter bread wheat samples with the functional brown rust Lr 34 resistance gene showed resistance in field conditions and in the infectious plots. The rest 25 samples with the Lr 34 gene belonged to the group of moderately resistant ones in the infectious plots. The identified 121 CIMMYT collection winter bread wheat varieties, with the Lr 34 gene possessing a resistant type of pathogen damage response (for example, 9919, 9921, 9928, 9809, 9811, 9812, 23, 24, 30, 262, 265, 266, etc.) have been recommended for use in leaf rust resistance pyramiding in future breeding programs.

Accessing Spelt Gene Pool to Develop Well-Adapted Zinc- and Iron-Rich Bread Wheat

Crop Science ◽  
2014 ◽  
Vol 54 (5) ◽  
pp. 2000-2010 ◽  
Author(s):  
Jayasudha Srinivasa ◽  
Balasubramaniam Arun ◽  
Vinod Kumar Mishra ◽  
Ramesh Chand ◽  
Deepak Sharma ◽  
...  
Keyword(s):  
Bread Wheat ◽  
Gene Pool
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