Indian Society of Genetics & Plant Breeding

Genetic analysis of poplar (Populus deltoides Bartr.) clones for early generation selection

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The study aimed to select the best clones from a field trial
of 69 newly developed clones and two check clones of
Populus deltoides after 3 years of field performances.
Growth traits were assessed for three growing seasons.
Significant differences were detected among clones for
plant height, stem diameter, estimated trunk volume and
sylleptic branch number. Plant height, stem diameter and
trunk volume had low to moderate (0.21 to 0.41) broad
sense heritability (h2) values. Sylleptic branch number
showed high genetic advance (77.53%) despite moderate
h2. In nursery trial, the h2 estimates were moderate to high
h2 (0.61 to 0.69) for growth traits. It is possible to apply
selection on the basis of principal component analysis
(PCA) accounting for a large part of the total variance in the
observed growth relying on trunk volume followed by stem
diameter, plant height and sylleptic branch number. The
promising clones viz. FRI-AM-53, -70, -51, -6 and -45
outperformed the control clone G-48. Stem diameter showed
high (0.97) genetic correlation with trunk volume and proved
to be a reliable criterion for selecting for trunk volume.The
set of 25 most promising clones based on PCA1 ranking
will be effective for selection of clones at the age of three
years.
 

Keywords: Populus deltoides, genetic variability, early selection, heritability, age-age correlation, principal component analysis

Info

Year: 2014
Volume: 74
Issue: 4
Article DOI: 10.5958/0975-6906.2014.00874.8
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

info_circle
Bikram Singh info_circle
Dinesh Kumar info_circle

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