HETEROSIS AND COMBINING ABILITY ANALYSIS FOR YIELD AND ITS COMPONENT TRAITS IN MAIZE (Zea mays L.)
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Date
2019-08-05
Authors
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Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
Thirty F1 crosses were developed from six parents through full diallel mating design was evaluated for ten characters to estimate magnitude of heterosis and combining ability effect of parents, specific combining ability and reciprocal combining ability effect of crosses and to identify potential F1’s for advancing in further. Six parents and thirty crosses along with two checks Maharaja and Rajarshi were raised in adjacent plot in RBD replicated twice with spacing of 60 X 20 cm and recorded observation on days to 50% tasseling, days to 50% silking, days to maturity, plant height (cm), cob length (cm), cob girth (cm), number of grains cob-1, 100 grain weight (g), grain yield plant-1 and grain yield plot-1. All the crosses exhibited significant heterosis in positive and negative direction. The means squares due to general combining ability and specific combining ability were significant for all the characters and means squares due to reciprocal combining ability significant for all the characters except days to 50% tasseling and cob girth. CM145, CM152 and CM123 are the parents were identified as good general combiner for yield and other yield contributing characters. These genotypes were may be recommended for their use in the crossing programme or for developing gene pool. High mean performance, significant useful heterosis, in desirable direction and positive significance sca/rca effect were considered as the criteria for selection of potential crosses. Based on above criteria the crosses UMI1200 X CM152, CM152 X CM145, CM152 X UMI1200 and UMI1200 X CM124 were identified to exhibit high mean, significant positive heterosis over both the checks and significant positive combining ability for grain yield plant-1 and other yield contributing characters.
Description
Six parents and thirty crosses along with two checks Maharaja and Rajarshi were raised in adjacent plot in RBD replicated twice with spacing of 60 cm X 20 cm and recorded observation on days to 50% tasseling, days to 50% silking, days to maturity, plant height (cm), cob length (cm), cob girth (cm), number of grains cob-1, 100 grain weight (g), grain yield plant-1 (g) and grain yield plot-1(kg).
Keywords
F1 Hybrids, Heterosis, Combining ability, Random mating.
Citation
CHAVAN, PAVAN BALIRAM. (2019). Heterosis and combining ability analysis for yield and its component traits in maize (Zea mays L.) Department of botany, Nagpur. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2019. Print. x, 71p. (unpublished).