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Genetic studies in segregating single and double cross F2 populations of striped brinjal (Solanum melongena L.)

KrishiKosh

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Title Genetic studies in segregating single and double cross F2 populations of striped brinjal (Solanum melongena L.)
 
Creator H.G.Ravishankar
 
Contributor R.V.Patil
 
Subject Horticulture
 
Description An investigation was undertaken in brinjal (Solanum melongena L.) to compare the
single cross and double cross F1 hybrids, to assess the magnitude of variability in F2
generation, to isolate economic segregants for yield and to study the response to selection for
yield and yield attributing traits in segregating single and double cross F2 populations.
The comparative study of SCF1s and DCF1s revealed that the double cross hybrids
(729.11g/plant) did not out yield the mean of single cross hybrids (704.52g/plants)
significantly showing the on-par performance with each other under prevailing sub optimal
soil and environment conditions. But over the fluctuating environment, double crosses greatly
stabilized the yield levels. The DCF1s, S.C.H.N.1 x S.C.H.N.4 (730.53g/plant) and S.C.H.N.2
x S.C.H.N.5 (727.7g/plant) and SCF1s, S.C.H.N.2 (760.05g/plant) were better economic
hybrids for yield per plant. Analysis of variability indicated DCF2 population had greater
genetic variability over SCF2 as exhibited by higher values for mean, range, CV (%), PV,
GV, PCV and GCV values. S.C.H.N.4 among SCF2 and S.C.H.N.2 x S.C.H.N.5 in DCF2
were potential segregating population with highest variability.
Among segregating population, S.C.H.N.5 (34.54%) and S.C.H.N.2x S.C.H.N.5
(56.36%) in double cross F2. Among SCF2, R-I/ S.C.H.N.1 (13-5), R-I/ S.C.H.N.2 (4-11) and
R-I/ S.C.H.N.4 (13-9) and in DCF2, R-I/ S.C.H.N.1 x S.C.H.N.4 (2-17)(2-2), R-I/ S.C.H.N.1
x S.C.H.N.4 (2-17)(7-7), R-I/ S.C.H.N.2 x S.C.H.N.5 (2-7)(4-10) and R-I/ S.C.H.N.2 x
S.C.H.N.5 (2-7)(4-10 were the selections made for further development into purelines after
repeated selfing. Association analysis revealed that yield per plant had significant positive
association with number of fruits per plant, average fruit weight. Path analysis showed that
number of fruits per plant and fruit weight had positive direct effect on fruit yield. However,
length of fruits, number of fruits per cluster, days to first flowering and number of branches
showed negative direct effect
 
Date 2016-10-24T18:06:42Z
2016-10-24T18:06:42Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/81628
 
Format application/pdf
 
Publisher UAS, Dharwad