EVALUATION OF TWO CYCLES OF MASS SELECTION IN YZ COMPOSITE POPULATIONS OF SORGHUM (Sorghum bico1or. (L). Moeneh)
EVALUATION OF TWO CYCLES OF MASS SELECTION IN YZ COMPOSITE POPULATIONS OF SORGHUM (Sorghum bico1or. (L). Moeneh)
No Thumbnail Available
Date
1985-05
Authors
ABA, DANIEL AFANG
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
A random-mating population of sorghum (Sorghum
bicolor. (L) Moenob)YZC composite, was being improved
for yield using recurrent mass selection. The results
from the evaluation of the data showed significant improvement
for yield, in the individual as well as in the combined
locations. Significant associated response was observed for
plant height, emergence count and. count at harvest. There
was a significant reduction in maturity. Analysis of
variance for the individual as well as for the combined data
was done. Observed vs expected genetic change was also
computed.
After two cycles of selection, a gain of 24.39% and
54.05% in head weight per plot and grain weight per plot
were observed respectively. This means an average of 12.2%
and 27.03% gain per cycle, respectively. From the combined
analysis of variance, highly significant different
(p = 0.01) between locations for all traits except for count:
at thinning and head width. Highly significant population
mean squares were also recorded for all traits except head
width and number of grains per plant. Non--significant
genotype x environment interaction mean squares were observeu
for all traits except days to 50% flowering which showed a
highly significant (p = 0.01) mean square.
Description
A thesis submitted to the Faculty of Agriculture of Ahmadu
Bello University in partial fulfillments for the award of
the degree of Master of Science in Crop Breeding in the
Department of Plant Science, Faculty of Agriculture.
MAY 1985.
Keywords
EVALUATION,, TWO CYCLES,, MASS,, SELECTION,, YZ COMPOSITE,, POPULATIONS,, SORGHUM,, (Sorghum bico1or., (L). Moeneh).