Abstract:
An experiment was conducted to study the genetic diversity in ridge gourd at the
expernienta I Field of Genet icsanl Plant Breeding, Sher-e-Bangla Agriculture lniu I 'he
experiment was laid out in Randoinizetl Complete Block Design (RC13D) with three
replications. 'tIle study on genetic diversity of 25 ridge goLird genolypes were carried oiii
using morphological traits and field performance during February. 2008 to Augiisl . 200.
The results of the exper nent revealed that the characters under study varied signi heantly
among the genotypes. Among the 25 genotypes G I was the best in respect of number of
fruits per plant (32.33) and average yield per plant (5.43 kg). The phenulypic variance
was higher than the corresponding genotypie variance in all the characters. indicating
gicaler influence of environment on the expression of these characters. l3ased on ft
statistics and principal component analysis, the genotypes under study were grouped into
live dilij.,rent clusters. Cluster I contained only ('318 genotype and cluster V contained
maximum number of genotypes (8) thllowed by cluster I'll (7). cluster IV (5) and cluster
It (4). ( 'lustering pattern revealed that the maxinunii inter-cluster (listanee was observed
between cinsler I and III 35.77) followed by the distance between clusters I and II
(27,27), I mud IV (22.34). III and V (21.05). the lowest inter-cluster distance was
observed between cluster [I and IV (6.92) followed by IV and V (8.00). It and lIt (9,25),
ilie highest mt ia-c luster distance was ideni i lied in cluster II (0.9[5) and the II,vest mtracluster
distance was observed in cluster 1 (0.00). Considering cluster meal), cluster IV
could be selected fbi yield per plant. number of fruits per plant, average fruit weight and
liii it length. '1 'he contribution of both frLuit eircuin kreiice and hundred seed weight were
niosi responsible to the total divergence in ridge gourd genotypes. Vector I obtained from
PtA expressed that first female Ilower bud, fruit circumference and hundred seed weigluu
were nlaiou characters that contribute to genetic divergence, which was the reflection of'
Iirst axis di lierent hit ion. In vector 2. limit eireuun ièrenee, limit weight. hundred seed
weight and number of hulls pet plant played major rule on genetic divergence. ()theu
characters have minor contribution in determining genetic divergence. Considering group
distance and the agronomie performance, the inter genotypie crosses between U I & (.i25.
toItoved by ('ii & 68:01 & 09;Gl &Gto:09&(J25:GN& 025: (ii &Cito:UI &
01 7: (Ii 7 & 025; 0 1 & ('IS and Gil & 018 might be suitable choice for futtn'e
hybridization programme.
Description:
A 'I'hesis
Submitted to the Faculty of Agriculture
Sher-e-Rangla Agricultural University, Dliaka,
In jartial liii iii Iment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
SEMESTER: JULY - DECEMBER, 2008