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Researcher Dudhat, N. M.
Advisor Dhaduk, L. K.
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Master of Science (M.Sc.)
Publisher JAU
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Agriculture & related technologies ♦ Techniques, equipment & materials
Subject Keyword Plant Breeding ♦ Heterosis and Combining Ability Analysis In Brinjal (solanum Melongena L.)
Abstract The present investigation was undertaken in brinjal in order to estimate heterosis, combining ability and nature of gene action involved in the inheritance of fruit yield and its components characters, viz., days to 50% flowering, days to first picking, fruit length(cm), fruit girth(cm), fruit weight (g), number of fruits per plant, number of primary branches per plant, plant height(cm), fruit yield per plant (kg), plant spread(cm), Total Soluble Solids and fruit borer infestation (%). The crosses were attempted by adopting line x tester analysis involving nine lines and four testers during rabi- 2010. The resultant 36 hybrids along with their parents and standard check GBH-2 were evaluated in Randomized Block Design with three replications during Kharif- 2011 at Instructional Farm, College of Agriculture, Junagadh Agricultural University, Junagadh. Analysis of variance revealed significant differences among all the parents as well as crosses for all the characters studied. This indicated that parents and hybrids had significant variation for different traits. Variance due to parents Vs hybrids comparison was also significant for all the traits except for days to first picking. A marked degree of useful and significant heterosis over better parent and standard check (GBH-2) was observed in individual crosses for different traits. The magnitude of heterosis was high for total fruit yield per plant, fruit girth, fruit length, fruit weight, Total Soluble Solids, number of primary branches per plant and days to flowering; moderate for days to first picking, number of fruits per plant, plant spread plant height and fruit borer infestation. Significant and positive standard heterosis for fruit yield per plant and some of its component traits were recorded in three crosses, namely GP-188 x GOB-1, GP-115 x GJB-2, and GP-115 x JBL-1. Variances for combining ability due to lines and testers were non-significant for all the traits except lines for days to 50% flowering, days to first picking and number of fruits per plant and testers for days to 50% flowering and Total Soluble Solids, while mean square due to lines x testers was significant for all the characters. This indicated the involvement non-additive type of gene action in the inheritance of all these characters. The ratio (ï ³2sca / ï ³2gca) also suggested preponderance of non-additive gene action for fruit yield per plant and most of the component traits. The estimate of gca effects indicated that the parents GP-115, GP-188, and GJB-2 were good general combiners for fruit yield and some of the important fruit yield contributing characters. It was observed that per se performance of parents for majority of characters, in general, related to their gca effects. Parents which exhibited significant gca effects for fruit yield per plant also possessed high and significant gca effects for some of the yield components. The cross combinations viz., GP-118 x GOB-1, GP-188 x GOB-1 and GP-118 x JBL-1 were found to be good specific cross combinations for fruit yield per plant. Crosses showing high sca effects for fruit yield also depicted high sca effects for important yield attributes, accompanied by high to moderate heterotic response. Crosses with high sca effects in fruit yield per plant were in combinations of poor x average or good x average or poor x poor general combiners. Due to preponderance of non-additive gene effect for fruit yield and most of its component traits, heterosis breeding would also be practically feasible in crop like brinjal.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Junagadh
Size (in Bytes) 111.88 MB
Page Count 124