Vol. 7 (2) : March-April 2016 issue
Green Farming Vol. 7 (2) : 277-282 ; March-April, 2016
Generation mean analysis for grain yield attributing traits in maize (Zea mays L.)
KRANTIKUMAR H. PATILa1*, R.C. MAHAJANb2 and C. LEKHA RANIa3
aDepartment of Plant Breeding and Genetics, College of Agriculture, Vellayani (Kerala Agricultural University) Thiruvananthapuram - 695 522 (Kerala)
bDeptt. of Agricultural Botany, College of Agriculture, Latur (V.N. Marathwada Krishi Vidyapeeth, Parbhani) (M.S.)
Designation : 1Ph.D. Scholar *(patilkrantikumar55@gmail.com), 2,3Assoc. Professor
Subject : Crop Genetics and Plant Breeding
Paper No. : P-3814
Total Pages : 6
Received : 19 June 2015
Revised accepted : 25 February 2016
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Citation :
RAJASHEKAR INDI, SAVITHRAMMA D.L. and VINUTHA D.N. 2016. Generation mean analysis for grain yield attributing traits in maize (Zea mays L.). Green Farming Vol. 7 (2) : 277-282 ; March-April, 2016
ABSTRACT
The present study was conducted to evaluate genetic and epistatic effects governing the inheritance of grain yield and yield components. Parental material comprising of six genetically different maize lines were crossed in four combinations to produce F1, F2 and backcross generations. The analysis of variance showed significant differences among generations. Generation mean analysis revealed the presence of dominance type of gene action observed in the cross IC-328953 x GPM-210 for all grain yield traits except for 100 grain weight (g). All traits were found to be governed by dominance gene action except for the trait number of grains per row which was governed by additive x additive type of gene action in the cross IC-326865 x GPM-470. The cross GPM-470 x GPM-405 showed dominance x dominance type of epistatic gene action for all the grain yield contributing traits. In the cross IC-274556 x GPM-210 all traits were governed by dominance gene action only. The opposite of sign of h (dominance gene action) and l (dominance x dominance gene action) indicated the presence of duplicate epistasis. Significant role of dominance variance along with duplicate epistasis in the inheritance of the said characters favours the use of the research material selected genotypes for the development of single cross hybrids.
Key words :
Gene action, Generation mean analysis, Maize, Yield attributes.