Variability and divergence in <Emphasis Type="Italic">Pongamia pinnata</Emphasis> for further use in tree improvement |
| |
Authors: | B N Divakara Rameshwar Das |
| |
Institution: | (1) Division of Resource Management, Central Research Institute for Dryland Agriculture, Santoshnagar, Hyderabad, 500 059, Andhra Pradesh, India;(2) Division of Crop Sciences, Central Research Institute for Dryland Agriculture, Santoshnagar, Hyderabad, 500 059, Andhra Pradesh, India; |
| |
Abstract: | A total of 24 candidate plus trees (CPTs) of Pongamia pinnata (L.) Pierre. were selected to elucidate their variation and diversity based on thirteen quantitative traits (4 pod traits,
6 seed traits of parent trees and 3 progeny traits) at Forest Research Centre, Institute of Forest Productivity — Mandar,
Ranchi district during 2005–2007. The results show that, CPT-19 had maximum for seven traits viz, pod length (65.6 mm), 100-pod
weight (542.4 g), seed 2D (two dimension) area (351.2 mm2), seed length (27.9 mm), seed breadth (17.4 mm), 100-seed weight (217.9 g) and plant height (164.3 cm). The traits, 100-pod
weight and 100-seed weight had a high heritability (98.4%, 96.9%) accompanied with high genetic advance (46.0%, 34.9%). There
is a positive significant correlation between 100-pod weight and 100-seed weight traits at both genotypic and phenotypic levels
with plant height, collar diameter and volume index at 30 MAS (months after sowing). Volume index expressed a moderate heritability
(47.4%) accompanied with high genetic advance (48.4%), indicating that the character is governed by additive gene effects.
In divergence study, 24 accessions were grouped into 6 clusters on the basis of non-hierarchical euclidian cluster analysis.
The genotypes in cluster IV (CPT-5, CPT-6, CPT-7, CPT-12, CPT-16, CPT-18, CPT-22) and cluster III (CPT-4, CPT-8, CPT-9, CPT-20,
CPT-21) were most heterogeneous and can be best used within group hybridization. The wide diversity exists between the cluster
V and II, followed by cluster II and I and crosses between CPTs of these clusters may result in substantial segregates. It
is revealed that the existence of substantial variation and diversity can be utilized for genetic resource conservation and
further tree improvement programmers of the species. |
| |
Keywords: | Pongamia pinnata heritability genetic advance correlation path analysis image analyzer diversity analysis |
本文献已被 CNKI SpringerLink 等数据库收录! |
|