Transfer of additive "minor-effect" genes for resistance to Puccinia striiformis from Triticum dicoccoides into Triticum durum and Triticum aestivum

Reinhold, M.; Sharp, E. L.; Gerechter-Amitai, Z. K.

doi:10.1139/b83-297

Cited by 12 publications

(3 citation statements)

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“…(Miller et al, 1998), stripe rust ( P. striiformis Pers.) (Reinhold et al, 1983), leaf rust ( P. triticina Eriks.) (Dyck and Bartos, 1994), and powdery mildew ( Erysiphe graminis DC.…”

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Reaction of Wild Emmer Wheat Accessions to Fusarium Head Blight

et al. 2007

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Fusarium head blight (FHB), caused mainly by Fusarium graminearum Schwabe, is a serious disease of wheat (Triticum spp.) worldwide. Host resistance has proven the most effective method of controlling FHB in common wheat (T. aestivum L., 2n = 6x = 42, genomes AABBDD). Progress in breeding for FHB resistance in durum wheat (T. turgidum L. ssp. durum, 2n = 4x = 28, genomes AABB), however, has been limited by a lack of resistance sources. Fortunately, durum wheat has a large number of tetraploid relatives, which represent a gene pool for improvement of FHB resistance in durum. The objective of this study was to search for sources of FHB resistance in wild emmer wheat [T. turgidum L. ssp. dicoccoides (Körn. ex Asch. & Graebner) Thell., 2n = 4x = 28, genomes AABB] (TDIC). We evaluated 416 accessions of wild emmer wheat for reaction to FHB using the point inoculation method in a greenhouse environment. Accessions exhibiting a low FHB disease rating in preliminary evaluations were retested in fully replicated experiments. Among the 416 accessions tested, there was wide variation in response to FHB, ranging from highly resistant to highly susceptible. Several accessions showed minimal disease development across two or more seasons and represent potential new sources to enhance resistance of durum wheat to FHB.

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“…(Miller et al, 1998), stripe rust ( P. striiformis Pers.) (Reinhold et al, 1983), leaf rust ( P. triticina Eriks.) (Dyck and Bartos, 1994), and powdery mildew ( Erysiphe graminis DC.…”

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confidence: 99%

Reaction of Wild Emmer Wheat Accessions to Fusarium Head Blight

et al. 2007

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“…Recently, these wild emmer lines were crossed with two durum wheats and several bread wheats (REINHOLD et al ., 1983) known to possess additive minor-effect genes for stripe rust resistance . Although it has not been proved that these genes in wild emmer do not occur in cultivated wheat, it has been shown that they can act additively when combined either with minor-effect genes or with major-effect genes present in cultivated wheat .…”

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confidence: 99%

Additive gene action for resistance to Puccinia striiformis F.SP. Tritici in Triticum dicoccoides

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Gerechter-Amitai

Silfhout³

1984

Euphytica

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Triticum dicoccoides, wild emmer wheat. Puccinia striijbrmis, yellow rust, stripe rust of wheat, minor genes . SUMMARY Seven single-plant selections of wild emmer, with temperature-sensitive minor-effect genes for stripe rust resistance, were intercrossed in eight combinations . The resulting progenies were studied for a possible additive gene action .The transgressive segregation towards resistance in F 2 observed in all the combinations indicates that additive gene action for resistance indeed occurs in wild emmer. The common occurrence of this phenomenon in random combinations suggests further that several minor-effect genes are involved .Following selection of the most resistant plants in F 2 , a marked shift towards resistance was noted in F 3 , which demonstrates a positive response to selection . In some instances, additive resistance selected for (in F2) at the high temperature-profile was expressed (in F 3 ) also at the low temperature-profile . This kind of resistance, when utilized in breeding programmes, promises therefore to be effective over a range of temperatures .

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“…(Miller et al, 1998), resistance to stripe rust ( P. striiformis Pers.) (Reinhold et al, 1983), resistance to FHB (Miller et al, 1998), and grain quality factors (Joppa et al, 1991). A set of disomic chromosome substitution lines from TDIC in the background of Langdon durum had been developed as described by Joppa and Williams (1988) using the TDIC line FA‐15‐3 (“Israel A”).…”

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Fusarium Head Blight Reaction of Langdon Durum‐Triticum dicoccoides Chromosome Substitution Lines

et al. 2002

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Fusarium head blight (FHB), caused by Fusarium graminearum Schwabe, is a serious disease problem on durum wheat (Triticum turgidum L. var. durum) in the USA. To date, the resistance to FHB available in hexaploid wheat (T. aestivum L.) sources has not been transferred successfully to tetraploid durum. In the 1980s, USDA geneticist L.R. Joppa produced a set of disomic lines [LDN(DIC)] derived from wild emmer (T. turgidum L. var. dicoccoides). Each line had a different pair of chromosomes from T. dicoccoides substituted for the corresponding ‘Langdon’ durum chromosomes. The purpose of this study was to determine if any of the LDN(DIC) lines showed useful levels of resistance to FHB. We tested these lines for FHB response by inoculation with F. graminearum in the greenhouse. Inoculation was accomplished via the single spikelet method, in which a droplet of conidiospore suspension is placed into one spikelet per spike followed by mist–high humidity for 3 d to establish infection. After 21 d, spikes were scored for extent of FHB symptoms and the average disease severity of the lines compared. A low disease severity score in this test indicated the presence of resistance to FHB in that line. Each test was replicated and the tests were done five times. In each test, some lines differed significantly. One line, LDN(DIC‐3A), was consistently less susceptible and another line, LDN(DIC‐2A), was consistently more susceptible than the parent Langdon durum, which itself showed an intermediate FHB reaction. Several other LDN(DIC) lines showed a trend either for increased or reduced susceptibility to FHB. Since each line differs by a single chromosome pair, the results suggest that genes affecting FHB resistance are present on several different T. dicoccoides or Langdon durum chromosomes.

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Transfer of additive "minor-effect" genes for resistance to Puccinia striiformis from Triticum dicoccoides into Triticum durum and Triticum aestivum

Cited by 12 publications

References 12 publications

Reaction of Wild Emmer Wheat Accessions to Fusarium Head Blight

Reaction of Wild Emmer Wheat Accessions to Fusarium Head Blight

Additive gene action for resistance to Puccinia striiformis F.SP. Tritici in Triticum dicoccoides

Fusarium Head Blight Reaction of Langdon Durum‐Triticum dicoccoides Chromosome Substitution Lines

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