Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810055605
Authors: NIDHISHANKAR
Advisor: Dr. G. SHANTHKUMAR
Title: HETEROSIS AND COMBINING ABILITY ANALYSIS IN NEWLY DEVELOPED INBRED LINES OF MAIZE (Zea mays L.)
Publisher: University of Agricultural Sciences Dharwad
Language: en
Type: Thesis
Pages: 165
Agrotags: null
Keywords: HETEROSIS AND COMBINING ABILITY ANALYSIS IN NEWLY DEVELOPED INBRED LINES OF MAIZE (Zea mays L.)
Abstract: A study was conducted to assess the combining ability, nature of gene action and extent of heterosis with respect to grain yield and its component traits, involving 90 hybrids generated by L x T design using thirty inbreds, three testers. These hybrids, parents and checks were evaluated during kharif 2014 at MARS, UAS Dharwad. The analysis of variance revealed that significant amount of variability among genotypes for 13 quantitative characters studied. The computed variance ratios (GCA: SCA variance) revealed the predominance of non-additive gene action in the inheritance of all the traits except days to 50 per cent tassling, days to 50 per cent silking and cob height. Combining ability revealed that the lines N-4, N-6, N-7, N-14, N-22 and N-30 were identified as the best general combiner for grain yield and were found to be resistant reaction for turcicum leaf blight, common rust and maydis leaf blight. The standard heterosis revealed that hybrids viz., Hybrid-12, Hybrid-14, Hybrid-21, Hybrid-38, Hybrid-40, Hybrid-42, Hybrid-65, Hybrid-66, Hybrid-73 and Hybrid-90 exhibited significant positive heterosis over check Bio 9681 and Arjun and also exhibited significant sca effect for grain yield and its components. These hybrids except Hybrid-12 were found to be combined resistance to TLB, common rust and MLB. It is suggested to evaluate the identified hybrids in large scale trail to confirm their superiority. So these crosses can be utilized for exploiting hybrid vigor.
Subject: Genetics and Plant Breeding
Theme: HETEROSIS AND COMBINING ABILITY ANALYSIS IN NEWLY DEVELOPED INBRED LINES OF MAIZE (Zea mays L.)
These Type: M.Sc
Issue Date: 2015-06
Appears in Collections:Thesis

Files in This Item:
File Description SizeFormat 
TH11184.pdfHETEROSIS AND COMBINING ABILITY ANALYSIS IN NEWLY DEVELOPED INBRED LINES OF MAIZE (Zea mays L.)1.22 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.