SOME PHYSIOLOGICAL AND MORPHOLOGICAL DETERMINANTS OF GRAIN YIELD IN SORGHUM (Sorghum bicolor l. Moench)
SOME PHYSIOLOGICAL AND MORPHOLOGICAL DETERMINANTS OF GRAIN YIELD IN SORGHUM (Sorghum bicolor l. Moench)
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Date
1981-12
Authors
UCHECHUKWU, CHIEZEY
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Abstract
Eleven cultivars of sorghum were grown during the rainy
seasons of 1979 and 1980 to determine the influence of morphological
and physiological characters on grain yield.
Leaf area, effective grain filling period duration and
grain number per head were all positively and significantly
correlated with grain yield. High yielding cultivars like
L.1499 and SK 5912 were characterised by high leaf area,
longer grain filling period duration and more grains per head
than their lower yielding counterparts.
Plant height was negatively correlated with grain yield.
Shorter plants like L.1499, SK 5912 and L.75 gave higher grain
yield than the taller ones like FFBL, C-7-4 and FD-1.
Tillering did not contribute to grain yield. Tillering was
found to reduce the number of grains per head in some cultivars.
Head length was negatively correlated with grain yield.
Cultivars with long head like C-7-4 and FD-1 recorded poor grain
yield because of few grains on the head when compared with
short headed cultivars like L.1499, SK.5912 and L.75.
Grain weight also did not contribute to increased grain
yield. Grain weight was negatively correlated with grain number
per head thus resulting in reduction of total grain yield.
From the resul-s of the experiment, the highest grain
yielders - L.1499 and SK.5912 were characterised by high leaf
area, longer grain filling period duration and more grains per
head. All were short stemmed and short headed
Description
A thesis submitted to the Faculty
Of Agriculture of Ahmadu Bello
University in partial fulfillment
of the requirements for the degree
of Master of Science in Agronomy
DEPARTMENT OF AGRONOMY
Faculty of Agriculture &
Institute for Agricultural Research
AHMADU BELLO UNIVERSITY, ZARIA
NIGERIA
DECEMBER, 1981
Keywords
PHYSIOLOGICAL,, MORPHOLOGICAL,, DETERMINANTS,, GRAIN,, YIELD,, SORGHUM,, (Sorghum bicolor l. Moench)