Diallel Analysis of the Inheritance of Resistance to Race 6 of Plasmodiophora Brassicae in Cabbage

Chiang, M. S.; Crête, R.

doi:10.4141/cjps76-140

Cited by 26 publications

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“…This analysis also shows that many dominant alleles control resistance. Our conclusion contrasts most of the previous studies involving recessive alleles (WALKER and LARSEN 1951;GALLECLY 1956;AYERS 1957;SEAMAN et al 1963;CHIANG and CRETE 1976;WEISAETH 1974;YOSHIKAWA 1983;Voo-RIPS and VISSER 1991). Such contradictions may be explained by the choice of plant material; the cultivars Badger Shipper, Bohmerwaldkohl, Bindsachsener, or their progenies are almost always at the basis of all genetic studies.…”

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Inheritance of Resistance to Clubroot (Plasmodiophora brassicae Wor.) in Kale (Brassica oleracea ssp. Acephala)

Laurens

Thomas²

2004

Hereditas

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LAURENS, F. and THOMAS, G. 1993. Inheritance of resistance to clubroot (Plasmodiophora brassieae Wor.) in kale (Brassica oleracea ssp. acephala). -Hereditas 1 1 9 253-262. Lund, Sweden. ISSN 0018-0661. Received April 27, 1993. Accepted August 12, 1993 For kale (Brassica oleracea ssp. aeephala L.), the inheritance of resistance and that of tolerance to clubroot (Plasmodiophora brassicae) were studied. Six homozygous lines belonging to the half marrow-stem and green curly kale groups were intercrossed in a diallel F, mating design. Inheritance of resistance was assessed from a glasshouse test on young plants and from a field trial on adult plants. A Disease Index was used to estimate the behaviour of each progeny. Tolerance to clubroot was defined as the ratio of yield produced by a progeny on a clubroot-infected part of the field compared with its yield on an uninfected soil. Resistance to clubroot on young and adult kales is mainly controlled by genetic effects. The broad sense heritability assessments are greater than 0.8 for the 2 trials. Resistance inheritance is characterized by a predominance of additive genetic effects with incomplete dominance. Yet, the additive components have less relative importance compared to dominance effects in the inheritance of resistance of adult kales (h2., = 0.55 compared to 0.78 for young kales). Many dominant alleles control resistance. The phenotypic and genetic values calculated for resistance are not correlated with those of tolerance. The dominance genetic effects control a great part of the genetic variation for tolerance (h',, = 0.16). Breeding programmes are proposed to increase clubroot resistance level in the kale group. A maternal individual recurrent selection on progenies could be undertaken.

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“…The authors usually conclude that the inheritance of resistance to clubroot in B. oleracea is quantitative and involves recessive alleles (SEAMAN et al 1963: WEISAETH 1974CRUTE et al 1983;VOORIPS andVISSER 1991). CHIANG andCRETE (1976) analyzed a 4 x 4 diallel and demonstrated a high level for broad sense heritability with mostly additive genetic effects.…”

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Inheritance of Resistance to Clubroot (Plasmodiophora brassicae Wor.) in Kale (Brassica oleracea ssp. Acephala)

Laurens

Thomas²

2004

Hereditas

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“…Most studies on the genetic basis of clubroot resistance have not reported major gene dominant resistance to the pathogen in B. oleracea (Chiang & Crete, 1970 ;Crute et al ., 1980Crute et al ., ,1983Weisaeth, 1974 ;Vriesenga & Honma, 1971 ;Walker & Larson, 1951, 1960 . However, Chiang & Crete (1976) suggested the existence of a major gene group showing dominance effects on the control of resistance of race 6 of P brassicae in cabbage . They also have reported identifying a clubroot resistance gene with dominant action upon transfer from B .…”

Section: Discussionmentioning

confidence: 99%

“…Other studies have suggested that a pair of genes determines most of the resistance to clubroot in some B. oleracea cultivars (Chiang & Crete, 1970 ;Vriesenga & Honma, 1971) . Chiang & Crete (1976) concluded that additive effects were more important than dominance in cabbage . Crute et al .…”

Section: Introductionmentioning

confidence: 99%

Association of RFLP markers with trait loci affecting clubroot resistance and morphological characters in Brassica oleracea L.

Figdore¹,

Ferreira

Slocum³

et al. 1993

Euphytica

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Resistance to Plasmodiophora brassicae Wor. race 7, the causal agent of the disease clubroot, was examined in an F2 population of a cross between a clubroot resistant broccoli (Brassica oleracea var . italica) and a susceptible cauliflower (B. oleracea var . botrytis) . A genetic linkage map was constructed in the same population based on the segregation of 58 dispersed restriction fragment length polymorphism (RFLP) markers . Associations between the inheritance of RFLP marker genotypes and segregation for disease resistance, morphological and maturity characteristics were examined . For each trait examined, several chromosomal regions marked by RFLP probes appeared to contain trait loci, suggesting that each trait was under polygenic control . RFLP marker linkage to a major factor imparting dominance for clubroot resistance from the broccoli parent was observed in this population . Additionally, RFLP marker linkage to an independently segregating factor contributing clubroot resistance from the cauliflower parent was observed, indicating that it should be possible to use RFLP markers to facilitate selection of transgressive segregants having the combined resistance from both parental sources . In some instances, RFLP markers from the same or closely linked chromosomal regions were associated with both clubroot resistance and morphological traits . Analysis of RFLP marker genotypes at linked loci should facilitate the selection of desired disease resistant morphotypes .

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“…of resistance to race 2 of the clubroot pathogen is controlled by a single dominant gene. Other genetic studies of Brassica species have reported that resistance to the clubroot pathogen in B. oleracea (genome cc) is under polygenic recessive control (WALKER & LARSON, 1951;GALLEGLY, 1956;CHIANG & C&TE, 1970, 1976, whereas in B. carnpestris (genome ala]) and B. nupus (genomes aIaIqc1) resistance is mainly under dominant monogenic control (WIT, 1964;STRANDBERG & WILLIAMS, 1967;AYERS & LELACHEUR, 1972;JOHNSTON, 1974;JAMES & WILLIAMS, 1980). Thus, the monogenic dominant inheritance found in this study indicates that this single gene is located on a chromosome in the 'al' genome.…”

Section: And Discussionmentioning

confidence: 99%

Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea ssp. capitata). V. The inheritance of resistance

Chiang

Crête

1983

Euphytica

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Diallel Analysis of the Inheritance of Resistance to Race 6 of Plasmodiophora Brassicae in Cabbage

Cited by 26 publications

References 0 publications

Inheritance of Resistance to Clubroot (Plasmodiophora brassicae Wor.) in Kale (Brassica oleracea ssp. Acephala)

Inheritance of Resistance to Clubroot (Plasmodiophora brassicae Wor.) in Kale (Brassica oleracea ssp. Acephala)

Association of RFLP markers with trait loci affecting clubroot resistance and morphological characters in Brassica oleracea L.

Transfer of resistance to race 2 of Plasmodiophora brassicae from Brassica napus to cabbage (B. Oleracea ssp. capitata). V. The inheritance of resistance

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