Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810052390
Authors: MADHU G H
Advisor: Dr. M. C. WALI
Title: SYNTHESIS OF BASE POPULATION FOR HETEROTIC GROUPING THROUGH RECIPROCAL RECURRENT SELECTION IN MAIZE (Zea mays L.)
Publisher: University of Agricultural Sciences Dharwad
Language: en
Type: Thesis
Pages: 219
Agrotags: null
Keywords: SYNTHESIS OF BASE POPULATION FOR HETEROTIC GROUPING THROUGH RECIPROCAL RECURRENT SELECTION IN MAIZE (Zea mays L.)
Abstract: To identify the best specific combiners in maize based on their sca effects for continuation of second cycle of RRS, the experiment was carried out at All India Co-ordinated Maize Improvement Project, Agricultural Research Station, Arabhavi during rabi/summer 2013-14. The 200 hundred test cross progenies generated by crossing 58 S1lines from Population I and Population II using full sib reciprocal recurrent selection mating design were evaluated in randomized block design with two replications to estimate the specific combining ability (sca), correlation and path coefficient. Test cross progenies exhibited significant variability for 13 characters studied. The study on specific combining ability revealed that, sca effects of test cross progenies 36 (2) 8 x 1 (1) 12, 36 (1) 13 x 36 (1) 9, 53 (2) 12 x 67 (2) 17, 59 (1) 10 x 91 (2) 4 and 33 (2) 6 x 83 (2) 7 were highest for grain yield in Population I. The sca effects of test cross progenies 1 (1) 12 x 36 (2) 8, 25 (1) 15 x 29 (1) 13, 38 (1) 12 x 5 (3) 13, 68 (1) 6 x 46 (2) 7 and 82 (3) 15 x 38 (1) 12 were highest for grain yield in Population II. The magnitude of standard heterosis was assessed for grain yield and yield contributing characters in derived testcross progenies of both populations in comparison with standard checks. Derived testcross progenies revealed improvement in grain yield and other traits over standard checks. Correlation and path coefficient analysis indicated that days to 50 per cent tasseling, days to 50 per cent silking, plant height, ear height, ear length, ear circumference, number of kernel rows per ear, number of kernels per row, Hundred grain weight, grain yield per plot had strong association and directly affected grain yield in both the population.
Subject: Genetics and Plant Breeding
Theme: SYNTHESIS OF BASE POPULATION FOR HETEROTIC GROUPING THROUGH RECIPROCAL RECURRENT SELECTION IN MAIZE (Zea mays L.)
These Type: M.Sc
Issue Date: 2015-01
Appears in Collections:Thesis

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