NURSERY EVALUATION OF Populus deltoides Bartr. HYBRID CLONES
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Date
2018-09
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Nursery evaluation of Populus deltoides Bartr.
hybrid clones” was carried out in the Department of Tree Improvement and Genetic
Resources, Dr YS Parmar University of Horticulture & Forestry Nauni, Solan (HP) during
2016-2018. The twenty hybrid clones developed by UHF, Nauni, and two controls were
planted at a spacing of 60 X 60 cm in randomized block design (RBD) with three replications
and were evaluated for morphometric characters at nursery stage. Analysis of variance
revealed significant differences among clones for all the traits. On the basis of mean values of
growth characteristics, some best performing clones were identified viz. Kranti X 39N (17-5),
S1 X S7C11 (11-4), S1 X 17/92 (9-4), S1 X S7C4 (5-3) etc. and field testing is suggested for
these clones. Quantitative leaf characteristics were also evaluated as determinants of
productivity. Qualitative descriptors were prepared for poplar clones based on leaf, stem and
branch characters. Estimation of genetic components was carried out which revealed high
heritability and high genetic gain in plant height, collar diameter, bud length and leaf area.
All growth traits were positively correlated with each other as well as with most of the leaf
traits. On the basis of clustering, twenty-two clones were distributed in three clusters
suggesting inter-cluster crossing would be effective in future breeding programs.
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