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Genetic analysis of grain mould resistance in coloured sorghum genotypes

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Relation http://oar.icrisat.org/1867/
http://dx.doi.org/10.1023/A:1004145024022
 
Title Genetic analysis of grain mould resistance in coloured sorghum genotypes
 
Creator Audilakshmi, S
Stenhouse, J W
Reddy, T P
 
Subject Sorghum
 
Description Grain moulds are a major constraint to sorghum production and to adoption of improved cultivars in many tropical
areas. Information on the inheritance of grain mould reaction is required to facilitate breeding of resistant cultivars.
The genetic control of grain mould reaction was studied in 7 crosses of 2 resistant sorghum genotypes. P1, P2, F1,
F2, BC1 and BC2 families of each cross were evaluated under sprinkler irrigation for field grade and threshed grade
scores and subjected to generation mean analysis. Frequency distributions for grain mould reaction were derived
and F2 and BC1 segregation ratios were calculated. Grain mould reaction in crosses of coloured grain sorghum was
generally controlled by two or three major genes. Resistance to grain moulds was dominant. Significant additive
gene effects were also found in all cross/season combinations. Significant dominance effects of similar magnitude
to additive effects were also observed in five out of ten cross/season combinations. Gene interactions varied according
to the parents with both resistant and susceptible parents contributing major genes. Choice of parents with
complementary resistance genes and mechanisms of resistance will be critical to the success of resistance breeding.
 
Publisher Kluwer
 
Date 2000
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/1867/1/Euphytica116_2_95-103_2000.pdf
Audilakshmi, S and Stenhouse, J W and Reddy, T P (2000) Genetic analysis of grain mould resistance in coloured sorghum genotypes. Euphytica, 116. pp. 95-103.