MORPHOGENETIC VARIATION FOR LEAF FODDER QUALITY PARAMETERS IN POPULATIONS OF Grewia optiva DRUMMOND
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Date
2023-08-25
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ABSTRACT
The present investigation, entitled "Morphogenetic variation for leaf fodder quality
parameters in populations of Grewia optiva Drummond" was conducted during 2020–2023 in the
Department of Tree Improvement and Genetic Resources, College of Forestry, Dr. Y. S. Parmar
University of Horticulture and Forestry, Nauni, Solan (H.P.). This investigation was conducted in the
four altitudinal ranges (400 to 800 m (A1), 801–1200 m (A2), 1201–1600 m (A3), and 1601-2000 m
(A4) above mean sea level (a msl)) of Himachal Pradesh and Uttarakhand. Four major experiments
were conducted viz., morphological and genetic diversity of Grewia optiva Drummond,
physiochemical properties of soil, variation in fodder quality characteristics and molecular markerbased
analysis of the best studied material of this species. All physiochemical soil properties declined
as soil depth increased from 0 to 15 cm to 15 to 30 cm, with the exception of bulk density and particle
density. The proportions of soil organic carbon, soil nitrogen and soil porosity increased from A1 to
A4 altitudinal zone. Based on useful and desired characteristics of both morphometric and fodder
quality parameters six populations, i.e., Harsar, Sujanpur Tihra, Sihunta, Kutuldi, Jagdhar and
Sangrah and altitudinal zone A4 (1600-2000m) reported as best for further selection and tree breeding
program. These populations reported with more than 23 per cent crude protein. Variability estimates,
genetic parameters, correlation and divergence studies exhibited high variability between and among
populations. 15 genotypes DH1 (Dharot 1), DH2 (Dharot 2), DH4 (Dharot 4), HR1 (Harasar 1), ST1
(Sujanpur Tihra 1), DR1 (Dramman 1), DR2 (Dramman 2), NR4 (Neri 4), DA3 (Daggar 4), BA3
(Basal 3), KU1 (Kutuldi), SI2 (Sihunta 2), SI3 (Sihunta 3), KT1 (Kuthar 1) and KT2 (Kuthar 2)) were
identified based on seedling growth and fodder quality characteristics at 18 months old seedlings.
Only two of the 10 ISSR primers, i.e., UBC 809 and UBC 820 were amplified and generated a banded
pattern. Maximum variation was observed in the progeny of the DA3 (Daggar) and DH2 (Dharot)
genotypes. Morphological and genetic variation can be used to select suitable genotypes in
accordance with the domestication process of this important multipurpose species, to develop further
hybridization work and for mass multiplication of selected superior nutritive selections