HETEROSIS AND COMBINING ABILITY STUDIES IN RIDGE GOURD (Luffa acutangula (L.) Roxb.)
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Date
2012-07
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University of Horticultural Sciences, Bagalkot. (KRC College of Horticulture, Arabhavi).
Abstract
A study was conducted to assess the magnitude of heterosis and combining
ability in the line x tester crosses material involving 45 hybrids generated by crossing
15 lines and three testers and two commercial check (Naga and NS-3) in ridge gourd
during 2011- 2012 at KRCCH Arabhavi. The analysis of variance indicated that
significant amount of variation among the genotypes for yield and yield contributing
traits. Among the hybrids AHRG-I x Kolar Local, AHRG-I x Arabhavi Local,
Ghataprabha Local x Arabhavi Local, and Kanapura Local x Arka Summet were
identified best heterosis cross combination for fruit yield and its components.
Analysis of variance for combining ability due to SCA was higher in magnitude
than GCA for all the traits except days to last harvest and days to first harvest.
Further, the values GCA to SCA ratio for those characters support the predominance of
non-additive gene effects in governing the expression of those traits. Evaluation of
parents for all the 22 characters indicated Kanapur Local, Arka Sujat, Dalasunur Local,
and Selection 4-12 are the good general combiners. Based on these parental lines
showed high gca status and hence can be utilized as a potential source as a parent for
heterosis breeding.
Similarly evaluation of hybrids for all the 22 traits revealed Dalasunur Local x
Arabhavi Local, Mandya Local x Arka Summet, GreenLong x Arabhavi Local,Selection
4- 12 x Araka Summet, Gadag Local x Arabhavi Local, Ghataprabha Local x Arabhavi
Local, Jaipur Long x Arabhavi Local, Depthi x Arka Summet and Kanapur Local x
Arka Summet as the best specific combiners. It is proposed to evaluate the hybrids
AHRG-I x Kolar Local, AHRG-I x Arabhavi Local, Ghataprabha Local x Arabhavi
Local, and Kanapura Local x Arka Summet over location and seasons to confirm other
potentiality for exploitation of heterosis in ridge gourd.