PROVENANCE VARIATION FOR FRUIT, SEED AND SEEDLING TRAITS IN Albizia lehbek L. (Benth.) FROM KARNATAKA
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Date
2001-08-13
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
Twelve sources of Albizia lebbek from diverse bioclimatic zones of Kamataka, were
evaluated for pod, seed and seedling parameters. Geographic sources differed significantly for all
pod, seed, and seedling traits. Pods of Mysore provenance were longest, widest and had higher
mass but seeds showed lowest germination (6.66%). Maximum germination (30.67%) and shoot
length (5.85cm) were found in Bidar collections. Seedlings from Dharwad source exhibited
higher number of leaves, higher shoot dry weight and moderate Shoot Vigour Index (SVI).
The CV was highest for germination value (129.16%), and lowest for test weight
(16.48%). Among seedling traits, CV was highest for RVI (46.80%). Broad sense heritability
was highest for number of leaves/plant (0.795) and lowest for root dry weight per plant (0.20),
the genetic gain was highest for peak germination value (65.93%).
Pods with longer length, width and weight possessed higher test weight and weight of
good seeds. Genotypes with higher germination possessed higher root length, shoot length and
more number of leaves. Similarly, the seed sources with higher test weight produced longer
roots, more number of leaves and higher shoot mass. This suggests that vigour expressed during
seed germination may translate into higher biomass. Hence germination percentage can be
relayed for selection of seedling height.
Many pod traits strongly responded to rainfall than to any other geoclimatic feature. Seed
germination, collar diameter and shoot dry weights were positively associated with mean annual
rainfall. Principal Component Analysis identified that SVI, per cent seed germination and RVI
contributed maximum to the divergence of the populations (66.53%). Based upon the fruit, seed
and seedlings traits seven broad provenances of Albizia lebbek were identified, perhaps for the
first time in Kamataka.
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