Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810142966
Authors: ARCHANA, K. A.
Advisor: P. H. KUCHANUR, B. ARUNKUMAR, AYYANAGOUDA PATIL
Title: EFFECT OF GENOTYPE X ENVIRONMENT INTERACTION ON COMBINING ABILITY UNDER HEAT STRESS IN MAIZE (Zea mays L.)
Publisher: UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
Citation: 150
Language: en
Type: Thesis
Pages: 85
Agrotags: null
Abstract: Field experiments were conducted at three locations: Agriculture College Farm, Bheemarayanagudi, (Karnataka), CIMMYT (Asia), ICRISAT campus, Hyderabad (Telangana) and Bihar Agricultural University, Sabour, Bhagalpur (Bihar) to analyze combining ability, heterotic effects and stability of maize hybrids under heat stress and optimal conditions during summer.Twenty four hybrids and three commercial checks viz., 31Y45, D2244, DKC9108 were raised in alpha lattice design with two replications. Analysis of variance for combining ability revealed importance of non-additive gene action in the control of many traits under heat stress and optimal conditions. VL1011 and VL1032 were identified as good general combiners among females and males for the traits viz., days to 50 per cent anthesis and days to 50 per cent silking, respectively across environments. While, VL107 was good general combiner for the traits viz., plant height and cob height across environments and ZL11953 and VL128 as good general combiners for grain yield among females and males, respectively across environments. The hybrid, VL107 × VL128 had desirable specific combining ability effect for days to 50 per cent anthesis, days to 50 per cent silking and grain yieldacross environments and showed desirable heterosis for grain yield at Hyderabad under heat stress. The hybrid, ZL11959 × VL128 was stable across the environments for days to 50 per cent anthesis, days to 50 per cent silking and anthesis to silking interval as it recorded regression coefficient nearer to unity. The hybrids viz., ZL132102 × VL1033 and VL1011 × VL1033 were stable for plant height. The hybrids viz., VL062609 × VL128 (3.91 t ha-1) and VL107 × VL1033 (3.74 t ha-1) were identified as stable hybrids for grain yield across the environments.
Subject: Genetics and Plant Breeding
Theme: EFFECT OF GENOTYPE X ENVIRONMENT INTERACTION ON COMBINING ABILITY UNDER HEAT STRESS IN MAIZE (Zea mays L.)
Research Problem: EFFECT OF GENOTYPE X ENVIRONMENT INTERACTION ON COMBINING ABILITY UNDER HEAT STRESS IN MAIZE (Zea mays L.)
These Type: M.Sc
Issue Date: 2017-06-30
Appears in Collections:Thesis

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