TY  - BOOK
AU  - Gayathri K 
AU  - Abdul Vahab M (Guide)
TI  - Genetic Variability and Hetrosis in Cucumber (Cucumis Sativus L.)
U1  - 635 
PY  - 1997///
CY  - Vellayani
PB  - Department of Horticulture, College of Agriculture 
N2  - The present investigation on (Genetic variability and 
heterosis in cucumber (Cucumis sativus L.)' was conducted 
at the College of Agriculture, Vellayani, Trivandrum during 
1995-97. Twenty two genotypes of cucumber collected from 
different parts of the country were grown in randomised block 
design with two replications and assessed the genetic 
variability of fifteen characters. The genetic parameters like 
variability, heritability, genetic advance, correlation 
coefficients and direct and indirect effects of the component 
traits on yield were estimated. Seven parents were selected 
based on selection index, crossed in all possible combinations 
without reciprocals in a 7x7 diallel and produced 21 Fl 
hybrids. These F1 hybrids were evaluated along with their 
parents and derived information on general and specific 
combining ability and heterosis. 
Significant differences were observed among the 22 
genotypes for all the fifteen characters studied. Yield/plant, 
fruits/plant, average fruit weight and node to first female 
flower had the highest genotypic coefficient of variation with 
high heritability and genetic advance. Fruits/plant, average 
fruit weight, fruit girth and fruit diameter were highly 
correlated with yield. Fruit girth exerted the maximum 
 
positive effect on yield followed by average fruit weight and 
fruits/plant. 
Significant gca and sca variances were observed for 
all the traits. CS 12 and CS 9 were good general combiners 
for yield. The hybrids CS 12 x Punerikhira, CS 9 x ARC-1 and 
BSS 169 x ARC-1 possessed high sca effects for yield. 
Significant heterosis were observed for most of the 
traits. Relative heterosis, heterobeltiosis and standard 
heterosis were significant for days to first female flower 
opening. Punerikhira x ARC-1 and CS 9 x Punerikhira were 
significantly earlier than the standard variety CS 12. Relative 
heterosis and heterobeltiosis were observed for yield/plant. 
None of the hybrids exceeded the standard parent. The hybrids 
BSS 169 x ARC-1, CS 9 x ARC-l and Punerikhira x ARC-1 showed significant relative heterosis and heterobeltiosis for yield/plant.


UR  - http://krishikosh.egranth.ac.in/handle/1/5810099140
ER  -