LINE X TESTER ANALYSIS FOR COMBINING ABILITY IN GLADIOLUS (Gladiolus hybridus)
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Date
2017
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Birsa Agricultural University, Ranchi, Jharkhand-6
Abstract
The present investigation entitled “Line x Tester analysis for
combining ability in Gladiolus (Gladiolus hypridus)” was taken up to
evaluate some of the available germplasm of gladiolus for their future
utilization in crop improvement programme. The line x tester analysis for
combining ability was done with ten parents and twenty one crosses alone
for different characts and percent of contribution by male and female
parents for each character had been computed.
The parents and crosses differed significantly for almost all the
characters. The mean value of the crosses was at par with their respective
parental mean in almost all the characters. The genotypic and phenotypic
coefficient of variation was higher for character for the no. of florets open
at a time, spike length and vase life. Large no. of crosses was found to
give significant heterosis over mid parent and better parent.
Sunset Sky x Eighth Wonder (23.58) for spike length (26.68),
diameter of floret (20.34), number of floret open at a time (11.43) and vase
life (23.61) was recorded maximum positive heterosis over better parent.
Urmil x Candyman Showed maximum positive heterosis for number of
floret per spike.
Punjab Dawn was the best combiner for earliness for spike
emergence (-17.49) and flower bud initiation. Sunset Sky recorded 2.14
gca effect which was the best general combiner for number of florest per
spike. Summer Sunshine recorded 1.62 gca effect. The best combiner for
diameter of floret was Summer Pearl with 2.59 gca effect. Among the lines
Urmil -2.19 gca effects had recorded highest positive gca effect for vase
life.
In correlation study days taken for spike emergence, bud initiation,
no. of floret per spike was found to be positively and significantly
correlated with the days taken for the 1st floret to open, no. of floret open at
a time, spike length and vase life.
Description
LINE X TESTER ANALYSIS FOR COMBINING ABILITY IN GLADIOLUS (Gladiolus hybridus)
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