Field resistance in three bread wheat lines to the Russian wheat aphid, Diuraphis noxia (Hemiptera: Aphididae)

The availability of more resistance genes to Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko) may provide additional protection from new virulent strains or biotypes of the insect. This genetic study was conducted to determine the allelic relationships of resistance genes in two Iranian wheat (Triticum aestivum L.) lines, SHZ.W.102 and SHZ.W.104 and lines PI 137739, PI 262660, PI 372129, PI 294994 and PI 243781, carrying resistance genes Dn1, Dn2, Dn4, Dn5 and Dn6 respectively. The two Iranian lines were crossed to each of the other resistant lines, and F1 and F2 seedlings were screened for RWA reaction. The resistance gene in 102 was allelic to Dn1, however, the resistance gene in 104 was different from other known genes. The resistant line 104 is an effective source of genetic resistance to RWA and the gene symbol Dn7 is proposed for its resistance gene.

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

Journal of Economic Entomology ◽

10.1093/jee/82.6.1779 ◽

1989 ◽

Vol 82 (6) ◽

pp. 1779-1781 ◽

Cited By ~ 13

Author(s):

Du F. Toit

Keyword(s):

South Africa ◽

Bread Wheat ◽

Russian Wheat Aphid ◽

Components Of Resistance ◽

Wheat Lines

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Russian Wheat Aphid (Diuraphis noxia Mord): effect on Argentinean Bread Wheat According to Feeding Periods

Cereal Research Communications ◽

10.1007/bf03543930 ◽

1999 ◽

Vol 27 (1-2) ◽

pp. 139-146

Author(s):

H. A. Acciaresi ◽

B. BelIone ◽

H. O. Chidichimo ◽

H. O. Arriaga

Keyword(s):

Bread Wheat ◽

Russian Wheat Aphid ◽

Diuraphis Noxia

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Resistance to Rhopalosiphum padi (Homoptera: Aphididae) in Triticale and Triticale-Derived Wheat Lines Resistant to Diuraphis noxia (Homoptera: Aphididae)

Journal of Entomological Science ◽

10.18474/0749-8004-42.2.217 ◽

2007 ◽

Vol 42 (2) ◽

pp. 217-227 ◽

Cited By ~ 5

Author(s):

Louis S. Hesler ◽

Scott D. Haley ◽

Kabwe K. Nkongolo ◽

Frank B. Peairs

Keyword(s):

Population Growth ◽

Development Time ◽

Rhopalosiphum Padi ◽

Russian Wheat Aphid ◽

Diuraphis Noxia ◽

Significant Source ◽

Choice Tests ◽

Strong Source ◽

Wheat Lines

Rhopalosiphum padi (L.) (bird cherry-oat aphid) and Diuraphis noxia (Mordvilko) (Russian wheat aphid) are common aphid pests of wheat and can cooccur at relatively high levels within wheat fields. Resistance to both aphids has been identified in several triticale accessions. We conducted experiments to identify and characterize antibiosis-type resistance to R. padi in additional triticale lines and to test R. padi-resistance levels in several backcrossed, triticale-derived lines of D. noxia-resistant wheat. Triticale accessions ‘6A-558’, ‘H85-734’ and ‘M86-6174’ were identified with moderate levels of antibiosis to R. padi. All three accessions limited R. padi population growth relative to ‘Arapahoe’ over 13 d. 6A-558 increased development time of R. padi compared to that on Arapahoe, and 6A-558, H85-734 and M86-6174 each decreased the number of nymphs produced by R. padi over 7 d. Additional tests confirmed ‘N1185’ triticale as a strong source of resistance to R. padi, and showed that ‘Lamar’ wheat was not resistant to R. padi. Tests of wheat lines derived from crosses between N1185 and Lamar and then selected for resistance to D. noxia showed that three of 13 lines reduced the number of R. padiper plant, with resistance levels comparable to N1185 in two lines. Nymphiposition by R. padi measured over a 24-h period did not differ among any lines in no-choice tests. The results provide further support that triticale is a significant source of resistance to R. padi, but further work is needed to understand transference of R. padi-resistance from triticale to wheat.

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

PLoS ONE ◽

10.1371/journal.pone.0244455 ◽

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.

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