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Genetic analysis of maydis leaf blight resistance in subtropical maize (Zea mays L.) germplasm

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Title Genetic analysis of maydis leaf blight resistance in subtropical maize (Zea mays L.) germplasm
 
Creator B. Jeevan
Robin Gogoi
Devender Sharma
C. Manjunatha
H. Rajashekara
Dama Ram
K. K. Mishra
M. G. Mallikarjuna
 
Subject gene action
genetic effects
generation mean analysis
inheritance pattern
maize
maydis leaf blight
resistance breeding
Cochliobolus heterostrophus
 
Description Not Available
Knowledge on the genetics of maydis leaf blight (MLB) is crucial to breed the resistant maize cultivars to combat disease
epidemics as a sustainable and cost-effective approach. The present investigation was framed to understand the genetics of MLB resistance
in subtropical maize. Two contrasting genotypes CM119 (susceptible) and SC-7-2-1-2-6-1 (resistant) were used to generate six genetic
populations, namely P1, P2, F1, F2, BC1P1 and BC1P2, and evaluated in three target environments for MLB resistance under artificial
epiphytotic condition. The CM119 and SC-7-2-1-2-6-1 showed susceptible and resistant reactions with mean disease reaction of 3.89–3.98
and 1.88–2.00, respectively. The derived generations, namely F1, F2, BC1P1 and BC1P2 showed mean disease reaction of 2.15–2.28,
2.44–2.51, 2.19–2.24 and 2.22–2.28, respectively in the test locations. The segregating generations (F2: 0.35–0.37; BC1P1: 0.24–0.29 and
BC1P2: 0.17–0.20) showed variation for MLB disease resistance over the parental and first filial generations (P1: 0.11–0.17; P2: 0.08–0.13
and F1: 0.12–0.14). The genetic analysis of MLB resistance revealed the nonallelic interactions of duplicate epistasis type across the test
locations. Among the gene interactions, dominance 9 dominance [l] effect was predominant over additive 9 additive [i] and additive 9
dominance [j] effects. The segregation analysis and the prediction of the number of major loci revealed at least two major genes associated
with MLB tolerance in subtropical maize. Our investigation paved the foundation for the improvement of subtropical maize germplasm of
MLB resistance.
Not Available
 
Date 2021-01-28T08:41:24Z
2021-01-28T08:41:24Z
2020-11-24
 
Type Research Paper
 
Identifier Jeevan, B., Gogoi, R., Sharma, D. et al. Genetic analysis of maydis leaf blight resistance in subtropical maize (Zea mays L.) germplasm. J Genet 99, 89 (2020). https://doi.org/10.1007/s12041-020-01245-3
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/45087
 
Language English
 
Relation Not Available;
 
Publisher Indian Academy of Sciences