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Stability analysis of Maize (Zea mays L.) inbred lines introductions for yield parameters

KrishiKosh

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Title Stability analysis of Maize (Zea mays L.) inbred lines introductions for yield parameters
 
Creator Vijay Kumar Nadagoud
 
Contributor R.C.Jagadeesha
 
Subject Genetics and Plant Breeding
 
Description The present investigation was carried out to than amount of variability, heritability,
genetic diversity, correlation and path coefficient analysis of characters and to assess the
stability of genotypes.
In the first experiment, 181 genotypes and 5 checks were evaluated, observations
were recorded for 12 traits. Per se performance was studied, the lines such as 2089, 2163,
2082, 2169, 2184, 2090, 2074, 2088, 2086, 2079, 2084, 2034, 2146, 2036, 2119, 2033, 2246,
2024, 2162 and 2242 were found good for grain yield per plant. Wide range of variation was
observed in cluster mean performance of the character studied. Genotypes were grouped into
10 clusters, indicating the presence of diversity. The maximum intercluster distance was
between cluster I and V, indicating genotypes present in both clusters differ entirely. All the
characters under study showed positive significant association with grain yield per plant. Path
analysis indicated 100-grain weight, cob girth, cob length, number of kernel/rows and
number of kernel rows/cob should be considered as selection criteria for grain yield
improvement in maize.
In the second experiment, top 20 lines are selected from first experiment based on per
se performance and diversity study and were tested for stability along with 2 checks at
Dharwad, Hagari and Arabhavi. The Observations were recorded for 14 traits. Pooled
analysis of variance revealed significant differences among the genotypes and environment
for most of the characters. Similarly genotype x environment interaction showed significant
difference for most of the traits. On the basis of stability parameters, 2090, 2024, 2079, 2089
and 2119 were promising stable genotypes for majority of characters. Genetic variability
analysis showed that grain yield/plant and fodder yield had high variability, h² and GAM. All
the characters under study had high heritability. Days to 50 per cent tasseling and silking had
lower variability and low GAM.
 
Date 2016-10-27T15:24:29Z
2016-10-27T15:24:29Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/82572
 
Format application/pdf
 
Publisher UAS, Dharwad