REACTION OF BARLEY VARIETIES AND SELECTIONS TO ROOT ROT AND SEEDLING BLIGHT INCITED BY <i>HELMINTHOSPORIUM SATIVUM</i> P.K. AND B.

Hamilton, D.; Clark, R. V.; Hannah, A. E.; Loiselle, R.

doi:10.4141/cjps60-104

Cited by 5 publications

(1 citation statement)

References 2 publications

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“…In their study, as well as one by Simmonds (37) it was shown that surface sterilization of the seed resulted in increased disease, suggesting that surface flora on the wheat seed were antagonistic or antibiotic to H. sntivunz. (16), also on barley, surface sterilization of the seed did not alter the root-rot reaction. (16), also on barley, surface sterilization of the seed did not alter the root-rot reaction.…”

Section: Discussionmentioning

confidence: 76%

A study of factors influencing the genetics of reaction of barley to root rot caused by Helminthosporium sativum

Cohen¹,

Helgason²,

McDonald³

1969

Can. J. Bot.

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1969. A study of factors influencing the genetics of reaction of barley to root rot caused by Helminthosporium snrivu177. Can. J. Botany, 47: 4 2 9 4 3 . The inheritance of seedling reaction to root rot, caused by the 514 isolate of Helrninthospori~ct~ sntiv~tn~, was studied in crosses and backcrosses among the barley varieties CI.8969 and CI.8873, which show resistance, and the variety Olli, which is susceptible. The study was carried out under a controlled environment in growth cabinets. The data from reaction tests of F3 and backcross families were analyzed by Elston's procedure for testing a one-locus hypothesis, and by Powers' partitioning method. Polygenic inheritance for seedling reaction was indicated, but subsequent experiments showed that seed weight strongly influenced the reaction, which could account for the polygenic interpretation. Based on a drastic reduction of resistance in greenhouse-produced seed, irrespective of seed weight, a high positive correlation of seed weight with resistance in field-produced seed, and other evidence of a similar nature, it was assumed that resistance was related to a principle, present in the seed or on the seed surface, the quantity of which was influenced by seed size and modified by environment. Whether there was a genotypic influence on the quantity of the resistance principle, aside from that affecting seed weight, was not established conclusively. A field study involving the same materials, made in an area known to produce natural root-rot infection, showed that no correlation existed between the disease indices of the entries in the seedling stage in the growth-cabinet tests, and their reaction to the disease in the field. CI.8873 showed field resistance, whereas CI.8969 did not.

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Section: Discussionmentioning

confidence: 76%

A study of factors influencing the genetics of reaction of barley to root rot caused by Helminthosporium sativum

Cohen¹,

Helgason²,

McDonald³

1969

Can. J. Bot.

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Root rots of cereals. III

Sallans¹

1965

Bot. Rev

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Susceptibility of winter and summer crops to root and crown infection by Bipolaris sorokiniana

Wildermuth

Mcnamara

1987

Plant Pathology

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The susceptibility of 24 winter and 17 summer crops to infection by Bipolaris sorokiniana was tested in a glasshouse experiment by growing them in soil amended with wheat-barley grain colonized by B. sorokiniana (0-2 g per lOOgsoil). At anthesis, infection of both lesionedand randomly selected segments of roots and of crowns was determined by plating them on modified Czapek-Dox Agar. Incidence of infection in winter crops was higher than in summer crops. Guar, mung bean, soybean and sunflower were the least infected of the summer crops while chickpeas and safflower were the least infected of the winter crops. Amongst the taxonomic groups tested, the highest incidence of infection occurred in the gramineous species and the lowest in the leguminous species.Five summer crops growing in the field were sampled and infection by B. sorokiniana confirmed. Cultivars of wheat, barley, triticale and oats were also screened in a field experiment. Amongst these winter cereals, oats was the least susceptible in both field and glasshouse experiments. Differences between cultivars in susceptibility to common root rot, measured by the degree of lesion development in the subcrown intcrnode, were identified in wheat, triticale and oats but not in barley.

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REACTION OF BARLEY VARIETIES AND SELECTIONS TO ROOT ROT AND SEEDLING BLIGHT INCITED BY HELMINTHOSPORIUM SATIVUM P.K. AND B.

Cited by 5 publications

References 2 publications

A study of factors influencing the genetics of reaction of barley to root rot caused by Helminthosporium sativum

A study of factors influencing the genetics of reaction of barley to root rot caused by Helminthosporium sativum

Root rots of cereals. III

Susceptibility of winter and summer crops to root and crown infection by Bipolaris sorokiniana

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