EVALUATION OF MODIFIED BULK BREEDING PROCEDURE IN SESAME (Sesamum indicum L.)
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Date
1991
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ANDHRA PRADESH AGRICULTURAL UNIVERSITY HYDERABAD
Abstract
Bulk and modified single seed descent (Single
Capsule Descent - SCD) procedures were compared
in F6 generation of six crosses of sesame viz., PDP 1-2
x JLT-9, RCR-2 x AT-2, RCR-4 x AT-6, PDP 1-2 x JLT-8,
(GS-12 x TC 25) x AT-1 and PDP 1-2 x JLT-2 for seed
yield and yield contributing characters.
When method means across the crosses were
compared, bulk method of breeding exhibited marginal
superiority ov~r SCD procedure, for yield and majority
of yield attributes. In the cross PDP 1-2 x JLT-8, bulk
method of breeding showed clear superiority for all
parameters studied viz., method mean, mean of top 20
percent lines, best F6 line, range and co-efficient
variation. While in RCR-2 x AT-2, RCR-4 x AT-6 and (GS-
12 X TC-25) x AT-1, bulk method recorded higher values
for top few lines, for seed yield and majority of yield
attributes compared to SCD method. The SCD method of
breeding, however, exhibited superiority in crosses, PDP
1-2 x JLT-9 and PDP 1-2 x JLT-2, crosses of low parental
diversity. In general, SCD procedure retained greater
variability for yield and majority of yield attributes.
Bulk.method of breeding exhibited superiority
in general, for sesame breeding. However, SCD method of
breeding wit~ its advantages of low cost, saving in
space, time and labour in addition to retention of
greater variability may be preferred for crosses of low
parental diversity.
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