Indian Society of Genetics & Plant Breeding

INHERITANCE OF RESISTANCE TO RED ROT I. EVALUATION OF PARENTAL CLONES OF SACCHARUM SPECIES AGAINST RED ROT PATHOGEN (COLLETOTRICHUM FALCATUM WENT)

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The degree of resistance in parents has a profound effect on the frequency of resistance
in offspring. So far, no clear cut inheritance pattern for red rot resistance has been
worked out in previous studies and only scanty work on this aspect has been done.
Keeping this in view, present study was undertaken to study the role of parental
resistance in the development of red rot disease in their progenies. Sixty .seven parental
clones/germplasm comprising Saccharum species, viz., S. spontaneum (24), S. officinarum
(4), S. barberi (4). S. sinense (7), S. robustum (4), Co-hybrids (16), interspecific hybrids
(4) and clones showing horizontal resistant genotypes (4) were evaluated by plug
method of inoculation using a virulent isolate of C. falcatum Went (Co 1148, Jagadhari)
to find out the nature of inheritance of resistance to red rot pathogen in sugarcane.
The data recorded after 60 days of inoculation revealed that in S. spontaneum only
59% clones were resistant, while all the cones of S. barberi were resistant. Lowest
degree of resistance was recorded in Co-hybrids (25%) and in clones of S. sinense
(29%). However, the clones of S. officinarum, S. robustum, inter specific hybrids (ISH)
and some genotypes, earlier identified as having horizontal resistance, showed resistance
and susceptible ratio of 1:1.
 

Keywords: Inheritance, sugarcane, red rot resistance

Info

Year: 2000
Volume: 60
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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