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  • 1
    Electronic Resource
    Electronic Resource
    Resistance to yellow rust in Triticum dicoccoides. I. Crosses with susceptible Triticum durum (1989)
    Springer
    European journal of plant pathology 95 (1989), S. 73-78 
    Details
    ISSN: 1573-8469
    Keywords: Puccinia striiformis ; stripe rust ; wild emmer wheat ; genetics ; inheritance ; major genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting In dit onderzoek werden 45 resistente wilde-emmer selecties (Triticum dicoccoides) gekruist met de vatbareTriticum durum cv. D447 om na te gaan hoe de resistentie van de wilde-emmer selecties overerft. De ouders, de F1- en F2-populaties van een bepaalde selectie werden in het kiemplantstadium getoetst met één Israëlisch gele-roest isolaat van fysio 2E0 of van fysio 2E18. In de uitsplitsende F2-populaties werden de nietsporulerende planten als resistent beschouwd en de sporulerende als vatbaar. De waargenomen uitsplitsingsverhoudingen komen overeen met 9 verschillende theoretische uitsplitsingsverhoudingen in de F2. Het meest voorkomend (23 herkomsten) was een R∶S=3∶1 uitsplitsing, wijzend op één dominant gen. In zes herkomsten lijken twee dominante genen aanwezig te zijn, die in drie gevallen onafhankelijk overerven (15∶1) en in de andere drie complementair (9∶7). In één herkomst lijkt de resistentie op tenminste drie dominante genen te berusten, daar alle 256 getoetste planten resistent waren. Een uitsplitsing wijzend op één dominant gen samen met één of twee recessieve genen (13∶3 of 55∶9) werd in zeven herkomsten gevonden. Resistentie berustend op uitsluitend recessieve genen werd aangenomen in acht herkomsten. In drie gevallen erven deze genen onafhankelijk over (1∶3 of 7∶9), in de overige vijf complementair (1∶15). Concluderend kan worden gesteld dat de resistentie in dit wilde-emmer materiaal in de meeste herkomsten (67%) op uitsluitend dominante genen lijkt te berusten, of op een combinatie van dominante en recessieve genen (15%). In de overige herkomsten (18%) lijkt de resistentie te berusten op uitsluitend recessieve genen. Om de gevonden resultaten te kunnen verklaren moet worden aangenomen dat er tenminste acht genen zijn betrokken bij de resistentie in deze wilde-emmer herkomsten.
    Notes: Abstract Out of 71 selections of wild emmer wheat which were involved in this study on the inheritance of resistance to yellow rust, 45 selections gave conclusive results. The most common finding was that the observed segregation ratios in the F2-progenies indicated that the resistance is based on one or more dominant genes (67%). Less frequently, resistance may be conferred by one or more recessive genes (18%), or a combination of both dominant and recessive genes (15%). At least eight different genes have to be involved in the 45 wild emmer selections in order to account for our findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01997475
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  • 2
    Electronic Resource
    Electronic Resource
    Race-specificity of temperature-sensitive genes for resistance to Puccinia striiformis in Triticum dicoccoides (1989)
    Springer
    Euphytica 43 (1989), S. 7-14 
    Details
    ISSN: 1573-5060
    Keywords: Triticum dicoccoides ; wild emmer wheat ; Puccinia striiformis ; yellow rust ; stripe rust ; minor genes ; temperature-sensitive genes ; resistance ; race-specificity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Twenty-four entries of wild emmer possessing temperature-sensitive genes for resistance to yellow rust were studied in the seedling stage, at two temperature-profiles, with 15 pathogenic races from 11 countries in South America, Africa, Asia and Europe. It was shown that the majority of the resistance genes in these wild emmer entries were race-specific. In most of these entries a more resistant reaction was displayed at the higher temperature-profile; however in three entries a shift in reaction towards resistance was observed with certain races but towards susceptibility with some of the other races, suggesting that two different kinds of temperature-sensitive genes were involved in each of these entries. The similarity of temperature-sensitive genes occurring in wild emmer and in cultivated wheat is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037890
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  • 3
    Electronic Resource
    Electronic Resource
    Additive gene action for resistance to Puccinia striiformis F.SP. Tritici in Triticum dicoccoides (1984)
    Springer
    Euphytica 33 (1984), S. 281-287 
    Details
    ISSN: 1573-5060
    Keywords: Triticum dicoccoides ; wild emmer wheat ; Puccinia striiformis ; yellow rust ; stripe rust of wheat ; minor genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: 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 F2 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 F2, a marked shift towards resistance was noted in F3, which demonstrates a positive response to selection. In some instances, additive resistance selected for (in F2) at the high temperature-profile was expressed (in F3) 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021123
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  • 4
    Electronic Resource
    Electronic Resource
    Temperature-sensitive genes for resistance to Puccinia striiformis in Triticum dicoccoides (1984)
    Springer
    Euphytica 33 (1984), S. 665-672 
    Details
    ISSN: 1573-5060
    Keywords: Triticum dicoccoides ; wild emmer wheat ; Puccinia striiformis ; yellow rust of wheat ; stripe rust of wheat ; temperature-sensitive genes ; minor genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Twenty-six selections of wild emmer collected at different sites in Israel and three entries obtained from Turkey were studied for the possible presence of temperature-sensitive genes controlling reaction to Puccinia striiformis. In tests carried out in Israel with a local P. striiformis isolate at two temperature regimes, 16 selections showed a change in infection rating toward resistance at the higher temperature regime. In comparable tests performed in the United States with a Montana P. striiformis isolate of different virulence pattern-including 14 of the same selection—ten entries displayed a temperature-sensitive reaction. Although slightly different temperature regimes were used in Israel and the United States, the results obtained were in general agreement. The shift toward resistance observed in the seedling tests at the higher temperature-profile was also evident in the field in the mature plant stage with increasing spring temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00021894
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  • 5
    Electronic Resource
    Electronic Resource
    Yr15 — a new gene for resistance to Puccinia striiformis in Triticum dicoccoides sel. G-25 (1989)
    Springer
    Euphytica 43 (1989), S. 187-190 
    Details
    ISSN: 1573-5060
    Keywords: Triticum dicoccoides ; wild emmer wheat ; Puccinia striiformis ; stripe rust of wheat ; yellow rust of wheat ; Yr genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary In a comparative study of reaction patterns and by analysis of segregation ratios in cross progenies, Triticum dicoccoides Koern. sel. G-25 was shown to possess a yet unknown gene for resistance to yellow rust. It is suggested to assign provisionally the symbol Yr15 to this gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037912
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Resistance to yellow rust in Triticum dicoccoides. II. Crosses with resistant Triticum dicoccoides sel. G-25 (1989)
    Springer
    European journal of plant pathology 95 (1989), S. 79-83 
    Details
    ISSN: 1573-8469
    Keywords: Puccinia striiformis ; stripe rust ; wild emmer wheat ; genetics ; inheritance ; major genes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Samenvatting In dit onderzoek werden 29 nieuwe resistente wilde-emmer selecties (Triticum dicoccoides) gekruist met de reeds uitvoerig bestudeerde resistente selectie G-25, om na te gaan of de resistentie van de nieuwe selecties wordt veroorzaakt door genen op dezelfde locus als het dominante gen in sel. G-25 of dat er andere loci bij zijn betrokken. De ouders, de F1-en F2-populaties van een bepaalade selectie werden in het kiemplantstadium getoetst met één Israëlisch gele-roest isolaat van fysio 2E0 of van fysio 2E18. In de uitsplitsende F2-populaties werden de niet-sporulerende planten als resistent beschouwd en de sporulerende als vatbaar. In de F2-populaties van 12 herkomsten werden geen vatbare planten gevonden, hetgeen er op duidt dat de resistentie wordt veroorzaakt door een gen op dezelfde locus als het gen in G-25 of door een gen dat neuw gekoppeld is aan het gen in G-25. Voor twee van deze herkomsten kan op basis van een fysio-specifieke interactie worden vastgesteld dat de resistentie berust op allelen die verschillen van het allel in sel. G-25. In 11 herkomsten werd een uitsplitsing voor twee dominante gene gevonden (R∶S=15∶1), waarbij het tweede dominante gen uit de getoetste nieuwe selectie afkomstig is. De aanwezigheid van twee dominante genen verschillend van het gen in sel. G-25 werd gevonden in één herkomst (63∶1). In de overige vijf selecties bleek de resistentie te worden veroorzaakt door één of twee recessieve genen waarnaast in drie gevallen ook nog een dominant gen werd gevonden. De resultaten tonen aan dat tenminste 19 van de 29 bestudeerde selecties resistentiegenen bezitten die verschillen van het gen inT. dicoccoides sel. G-25. Slechts in twee van deze selecties kan het gen allel zijn met het gen in sel. G-25.
    Notes: Abstract A comparison was made between the genes in 29 new selections of wild emmer wheat resistant to yellow rust over wide geographic areas and the previously extensively studied selectionTriticum dicoccoides G-25. In 23 selections the resistance may be conferred by 1 dominant gene; these include 11 selections in which the gene is different from the dominant gene in sel. G-25 and two others in which the genes were closely linked or allelic to the gene in G-25, differing from sel. G-25 by race-specificity. Two dominant genes different from the gene in sel. G-25, seem to be present in one selection. In five selections the resistance may be conferred by one or two recessive genes, including three instances in which the recessive gene was associated with a dominat gene. Our findings show that at least 19 out of the 29 selections studied possess genes which are different from the gene inT. dicoccoides sel. G-25.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01997476
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