HETEROSIS AND COMBINING ABILITY STUDIES IN CHINA ASTER (Callistephus chinensis [L.] Nees)
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Date
2015-07
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
The investigation on heterosis and combing ability in China aster (Callistephus chinensis [L] Nees.) was carried out at Kittur Rani Channamma College of Horticulture, Arabhavi. The twenty crosses derived from 5 x 5 full diallel (including reciprocal) cross were evaluated along with parents in randomized block design with two replications and data was subjected to full diallel analysis.
The parent, Kamini was a good general combiner for early flowering, while Violet Cushion was found to possess additive genes for growth, flowering, yield and quality parameters. Two crosses Kamini x Poornima and P.G.Purple x Poornima exhibited significant negative heterosis over mid parent and negative SCA effects for early flowering. The cross P.G.Purple x Poornima showed positive significant heterosis over mid parent and standard check ‘Kamini’, coupled with significant positive SCA effects for plant height, plant spread and number of branches. The cross AAC-1 x Poornima exhibited significant positive heterosis over mid, better parent and standard check coupled with significant positive SCA effects for yield and its components. Whereas, the cross Kamini x P.G.Purple showed positive significant heterosis over mid, better parent and standard check coupled with positive significant SCA effects for vase life. Non-additive gene action was predominant for majority of traits and hence recurrent selection scheme and heterosis breeding is suggested for improvement.
The cross P.G.Purple x AAC-1 was found to be resistant with low disease incidence for Alternaria leaf spot. Inheritance pattern for flower color revealed that violet color was dominant over all the other colors i.e., purple, pink and white. Whereas, white was recessive to all the other colors.
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TH524
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