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Authors: Chhimpi, Bharat Gambhirsinh
Advisor: Vashi, P. S.
Title: Genetic Divergence, Character Association and Path Analysis in upland riec (oryza sativa L.)
Publisher: Agricultural Botany Department, N. M. College of Agriculture Gujarat Agricultural University
Language: en
Type: Thesis
Pages: 89
Agrotags: null
Keywords: Botany
Description: A field experiment consisting of one hundred and ten ~notypes of upland rice was conducted at National Agricultural ?search project, Musa farm, Gujarat Agricultural UniverSity, during Kharif, 1994 with a view to study genetic .vergence, character association and path coefficients for grain .eld and its components. Analysis of variance revealed significant genotypic fferences for all the ten characters. A wide range of variation IS observed for all the characters. The nature and magnitude of genetic divergence was assessed :i09 Mahalanobis D2 statistics. The genotypes were grouped into ne clusters. The clustering pattern revealed no relationship 'tween genetic divergence and geographical distribution. Inter uster distance and cluster means for varlO• US characters ,dicated that hybridization between genotypes of cluster VII and II would give more variability in segregating generation. The mgth : breadth ratio and IOO-grain weight contributed maximum 18%) to the total divergence. Association analysis between grain yield and other • n~ne rronomic characters revealed that grain yield per plant had '.sitive and highly significant correlation with • gralns per miele, panicle le1Jgth, straw yield and plant height at lenotyp ic and genotypic levels. Significant and positive lrrelations were observed between grain yield and length •• "eadth ratio and protein content. Days to 50% flowering showed lsitive and high significant correlation with yield at genotypic ~vel. These traits also possessed positive correlation among lemselves. In view of the positive inter relationship amongst lese component it could be concluded that simultaneous Iprovement of yield through the selection of one or another _eld component would be possible. Path coefficient analysis indicated highest positive direct 'feet of grains per panicle followed by straw yield per plant, Inicle length, IOO-grain weight and protein content. In majority the cases the indirect effects of different components on 'ain yield through grains per panicle and panicle length ..,co ...... 'mparable. Based on these findings, it is suggested that parents having _irly high to medium genetic diverity may be selected for 'bridization in order to get .,.".b ~ !./bile L selectin high heterotic effects and better combinants. more emphaSis should be gl• ven to • alns per panicle, panicle length and medium plant height I• n der to get maximum genetic gain in upland rice.
Subject: Botany
Theme: M.Sc. Thesis
These Type: M.Sc
Issue Date: 1985-08
Appears in Collections:Master Degree Theses

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