Components of Resistance in Three Bread Wheat Lines to Russian Wheat Aphid (Homoptera: Aphididae) in South Africa

1989 ◽  
Vol 82 (6) ◽  
pp. 1779-1781 ◽  
Author(s):  
Du F. Toit
Keyword(s):  
South Africa ◽  
Bread Wheat ◽  
Russian Wheat Aphid ◽  
Components Of Resistance ◽  
Wheat Lines

scholarly journals Genome-wide association analysis of Russian wheat aphid (Diuraphis noxia) resistance in Dn4 derived wheat lines evaluated in South Africa

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244455
Author(s):  
Lavinia Kisten ◽  
Vicki L. Tolmay ◽  
Isack Mathew ◽  
Scott L. Sydenham ◽  
Eduard Venter
Keyword(s):  
South Africa ◽  
South African ◽  
The United States ◽  
Russian Wheat Aphid ◽  
Diuraphis Noxia ◽  
Genome Wide Association ◽  
Complex Genetics ◽  
Genome Wide ◽  
A Genome ◽  
Wheat Lines

Russian wheat aphid (RWA; Diuraphis noxia Kurdjumov) resistance on the 1D chromosome of wheat has been the subject of intensive research. Conversely, the deployment of the Dn4 derived RWA resistant varieties diminished in recent years due to the overcoming of the resistance it imparts in the United States of America. However, this resistance has not been deployed in South Africa despite reports that Dn4 containing genotypes exhibited varying levels of resistance against the South African RWA biotypes. It is possible that there may be certain genetic differences within breeding lines or cultivars that influence the expression of resistance. The aim of this study was to identify single nucleotide polymorphism (SNP) markers associated with resistance to South African RWA biotypes. A panel of thirty-two wheat lines were phenotyped for RWA resistance using four South African RWA biotypes and a total of 181 samples were genotyped using the Illumina 9K SNP wheat chip. A genome wide association study using 7598 polymorphic SNPs showed that the population was clustered into two distinct subpopulations. Twenty-seven marker trait associations (MTA) were identified with an average linkage disequilibrium of 0.38 at 10 Mbp. Four of these markers were highly significant and three correlated with previously reported quantitative trait loci linked to RWA resistance in wheat. Twenty putative genes were annotated using the IWGSC RefSeq, three of which are linked to plant defence responses. This study identified novel chromosomal regions that contribute to RWA resistance and contributes to unravelling the complex genetics that control RWA resistance in wheat.

scholarly journals Grain yield and correlated traits of bread wheat lines: Implications for yield improvement

2021 ◽  
Author(s):  
Muhammad Irfan Ullah ◽  
Shahzadi Mahpara ◽  
Rehana Bibi ◽  
Rahmat Ullah Shah ◽  
Rehmat Ullah ◽  
...  
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Yield Improvement ◽  
Correlated Traits ◽  
Wheat Lines

Construction of comparative genetic maps of two 4Bs.4Bl-5Rl translocations in bread wheat (Triticum aestivum L.)

Genome ◽  
2006 ◽  
Vol 49 (7) ◽  
pp. 729-734 ◽  
Author(s):  
R C Leach ◽  
I S Dundas ◽  
A Houben
Keyword(s):  
Triticum Aestivum ◽  
Bread Wheat ◽  
Rflp Analysis ◽  
Triticum Aestivum L ◽  
Genetic Maps ◽  
Homoeologous Group ◽  
Group 4 ◽  
Translocation Breakpoints ◽  
Group 5 ◽  
Wheat Lines

The physical length of the rye segment of a 4BS.4BL–5RL translocation derived from the Cornell Wheat Selection 82a1-2-4-7 in a Triticum aestivum 'Chinese Spring' background was measured using genomic in situ hybridization (GISH) and found to be 16% of the long arm. The size of this translocation was similar to previously published GISH measurements of another 4BS.4BL–5RL translocation in a Triticum aestivum 'Viking' wheat background. Molecular maps of both 4BS.4BL–5RL translocations for 2 different wheat backgrounds were developed using RFLP analysis. The locations of the translocation breakpoints of the 2 4BS.4BL–5RL translocations were similar even though they arose in different populations. This suggests a unique property of the region at or near the translocation breakpoint that could be associated with their similarity and spontaneous formation. These segments of rye chromosome 5 also contain a gene for copper efficiency that improves the wheat's ability to cope with low-copper soils. Genetic markers in these maps can also be used to screen for copper efficiency in bread wheat lines derived from the Cornell Wheat Selection 82a1 2-4-7.Key words: Triticum aestivum, wheat–rye translocation, homoeologous group 4, homoeologous group 5, GISH, comparative map, copper efficiency, hairy peduncle.

Field Screening of Salinity Tolerance in Iranian Bread Wheat Lines

Crop Science ◽  
2014 ◽  
Vol 54 (4) ◽  
pp. 1489-1496 ◽  
Author(s):  
Somaye Sardouie-Nasab ◽  
Ghasem Mohammadi-Nejad ◽  
Babak Nakhoda
Keyword(s):  
Bread Wheat ◽  
Salinity Tolerance ◽  
Field Screening ◽  
Wheat Lines

scholarly journals Expected genetic gains from mono trait and indexbased selection in advanced bread wheat (Triticum aestivum L.) populations

2020 ◽  
Vol 73 (2) ◽  
pp. 9131-9141
Author(s):  
Zine El Abidine Fellahi ◽  
Abderrahmane Hannachi ◽  
Hamenna Bouzerzour
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Flag Leaf ◽  
Block Design ◽  
Triticum Aestivum L ◽  
Research Unit ◽  
Kernel Weight ◽  
Wide Range ◽  
Wheat Lines ◽  
Selection Of

This study aimed at evaluating the expected gains from selection obtained based upon direct, indirect, and index-based selection in a set of 599 bread wheat lines. The experiment was carried out at the experimental field of INRAA institute, Setif research unit (Algeria), in a Federer augmented block design including three controls. A wide range of genetic variability was observed among lines for the eleven traits assessed. The results indicated that index-based selection and selection based on grain yield expressed higher expected genetic gain than direct and indirect mono-trait-based selection. The best 15 selected lines exhibited higher grain yield than the control varieties, and they were clustered in three groups that contrasted mainly for the flag-leaf area, thousand-kernel weight, biomass, and harvest index. The index-based selection appears as a useful tool for the rapid selection of early filial generations, enriching selected breeding materials with desirable alleles and reducing the number of years required to combine these traits in elite varieties.

scholarly journals Accessing a Russian Wheat Aphid Resistance Gene in Bread Wheat by Long‐Read Technologies

2019 ◽  
Vol 12 (2) ◽  
pp. 180065 ◽  
Author(s):  
Zuzana Tulpová ◽  
Helena Toegelová ◽  
Nora L. V. Lapitan ◽  
Frank B. Peairs ◽  
Jiří Macas ◽  
...  
Keyword(s):  
Resistance Gene ◽  
Bread Wheat ◽  
Russian Wheat Aphid ◽  
Aphid Resistance ◽  
Long Read

Registration of Five Synthetic Hexaploid Wheat and Seven Bread Wheat Lines Resistant to Wheat Spot Blotch

Crop Science ◽  
2001 ◽  
Vol 41 (5) ◽  
pp. 1653-1654 ◽  
Author(s):  
A. Mujeeb‐Kazi ◽  
S. Cano ◽  
V. Rosas ◽  
A. Cortes ◽  
R. Delgado
Keyword(s):  
Bread Wheat ◽  
Hexaploid Wheat ◽  
Spot Blotch ◽  
Synthetic Hexaploid Wheat ◽  
Synthetic Hexaploid ◽  
Wheat Lines
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