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Genetic analysis and stability performance for grain yield and its contributing characters in newly developed hybrids of maize (Zea mays L.)

KrishiKosh

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Title Genetic analysis and stability performance for grain yield and its contributing characters in newly developed hybrids of maize (Zea mays L.)
 
Creator Puttaramanaik
 
Contributor M. P, Rajanna
 
Subject yields, crossing over, maize, hybrids, grain, planting, additives, genes, biological phenomena, genetics
 
Description An investigation was carried out to evaluate diverse genotypes to assess nature and magnitude of gene effects, combining ability and to elucidate the information on
genotype x environment interaction in order to assess the relative stability of maize hybrids for productivity traits during 2005-06 at Zonal Agricultural Research Station,
V. C. Farm, Mandya. The four inbred lines viz., SKV-11, NAI-116, CM-202 and CM-
500 were used as base material in all the three experiments conducted. Experimental
material for six generations mean analysis comprised of P1, P2, F1, F2, BC1 and BC2
and 12 crosses synthesized using 4×4 full diallel mating design were evaluated in four locations viz., Mandya, Nagenahalli, Hiryur and Hassan with eight checks for stability analysis. Dominance, dominance x dominance epistatic gene effects played predominant role in inheritance of quantitative traits and duplicate type of interaction
was observed in all the traits except in C2 and C3 where in complementary type of
interaction was noticed for plant height and kernel rows per ear, while the degree of dominance was under control of over dominance as indicated by potence ratio of
more than one in all the four crosses. Analysis of variance indicated the presence of significant difference among parents and hybrids while, higher magnitude of SCA to GCA variance indicated higher dominance variance than additive variance for all the
traits except ear height. The line CM-202 was identified as good general combiner.
The pooled analysis of variance revealed that MSS due to genotype and environment
were highly significant indicating the presence of variability among the test hybrids
and environments for most of the traits and four hybrids viz., CM-202×SKV-11, CM-
500×CM-202, CM-202×NAI-116 and SKV-11×NAI-116 were found stable across
different locations.
 
Date 2016-05-23T13:57:44Z
2016-05-23T13:57:44Z
2013-11-08
 
Type Thesis
 
Identifier Th-10688
http://krishikosh.egranth.ac.in/handle/1/66224
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru