Record Details

INHERITANCE STUDIES OF YIELD, QUALITY TRAITS AND GYNOECIOUS SEX EXPRESSION IN CUCUMBER (Cucumis sativus L.) USING EXOTIC LINES

KrishiKosh

View Archive Info
 
 
Field Value
 
Title INHERITANCE STUDIES OF YIELD, QUALITY TRAITS AND GYNOECIOUS SEX EXPRESSION IN CUCUMBER (Cucumis sativus L.) USING EXOTIC LINES
 
Creator KALIDAS PATI
 
Contributor A. D. Munshi
 
Subject Service failed, response=Internal Server Error
 
Description T-8532
The present investigation entitled, “Inheritance studies of yield, quality
traits and gynoecious sex expression in cucumber (Cucumis sativus L.) using
exotic lines’’ was carried out at Indian Agricultural Research Institute, New Delhi
during 2009-2011 with the major objectives to estimate the magnitude of heterosis,
combining ability, gene action and generation mean analysis for yield and its related
traits and heterosis and combining ability for nutritional traits and finally to study
the inheritance pattern of gynoecious sex expression in cucumber. The material for
the study consisted of 8 genetically diverse indigenous and exotic parental lines of
cucumber and they were crossed in a diallel fashion (excluding reciprocals) to obtain
28 F1 hybrids.
The parents P1 (GBS-1) and P5 (Pusa Uday) were observed to be the most
promising for earliness and other desirable characters including total yield per plant.
The gynoecious hybrids P1 x P5 (GBS-1 x Pusa Uday), P1 x P6 (GBS-1 x Punjab
Naveen) showed best performance for yield per plant followed by monoecious
hybrid P3 x P5 (GS-4 x Pusa Uday) as they manifested high heterosis percentage of
66.40 %, 54.44 % and 41.29 %, respectively over top parent P5 (Pusa Uday). Among
parents, gynoecious line GBS-1(P1) showed maximum gca effects in desirable
direction for node number of first female flower, days to first female flower
anthesis, days to fruit set from opening of first female flower, days to first fruit
harvest, number of fruits per plant, and vine length. In order of merit the gynoecious
hybrids P1 x P5 (GBS-1 x Pusa Uday) and P1 x P6 (GBS-1 x Punjab Naveen)
followed by monoecious hybrid P3 x P5 (GS-4 x Pusa Uday) exhibited highest sca
effects for number of characters including total fruit yield per plant. The diallel
analysis of genetic compent of variance revealed over-dominace gene action and
low narrow sense heribability for majority of important yield contributing characters
except days to first female flower anthesis, days to first fruit harvest, average fruit
weight and vine length where partial dominace is more predominant. Among the
eight parental lines, gynoecious parent P1 (GBS-1) was observed to be best
performing for total soluble solids, vitamin C and potassium content. The hybrid P5
x P6 (Pusa Uday x Punjab Naveen) was found to superior over better, mid and top
parent for potassium content, can be taken up for commercial cultivation. The mean
square due to gca and sca were highly significant for all the characters studied
which revealed that both additive and non-additive gene actions were important in
the inheritance of nutritional traits. The F1 hybrids P3 x P5 (GS-4 x Pusa Uday) for
total soluble solids, P3 x P8 (GS-4 x 7026B-76) for vitamin C, P1 x P8 (GBS-1 x
7026B-76) for calcium and P5 x P6 (Pusa Uday x Punjab Naveen) and P6 x P8
(Punjab Naveen x 7026B-76) for potassium content, exhibited highest sca effects
may be exploited for development of nutritionally rich F1 hybrids. The study on
gene effects based on generation mean analysis showed significance of dominance,
additive and epistatic component in most of the crosses for different characters. The
preponderance of non-additive and additive component of variance suggested the
importance of heterosis breeding and recurrent selection for effective utilization of
dominance and additive variance of variation. The segregation of gynoecism in F2
generation was observed to be in 3: 1 (gynoecious vs. monoecious) ratio which
indicated gynoecious sex form in cucumber is controlled by single dominant gene.
 
Date 2016-12-03T13:20:21Z
2016-12-03T13:20:21Z
2011
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/88986
 
Format application/pdf
 
Publisher IARI, DIVISION OF VEGETABLE SCIENCE