ABSTRACT
This study was aimed at investigating the effect of
x-irradiation on growth and yield parameters of four cowpea (Vigna unguiculata
(L.) Waip) varieties (Black eye, Dark Brown eye, Ife Brown and Light Brown
eye). Fifty seeds each of the varieties were arranged into five groups in a
paper envelop and irradiated at five levels ranging from (0, 5, 10, 15 and 20
MGy) respectively at the Radiology Department of the Federal Medical Centre
(FMC) Umuahia, Abia State. The growth parameters were recorded at 2, 4, 6, 8,
10 and 12 week after planting (WAP). The field experiment was conducted in a
4x5 factorial experiment in a Randomized Complete Block Design (RCBD) with
three replicates at the Teaching and Research farm of Micheal Okpara University
of Agriculture Umudike. The parameters measured include days to 50% emergence,
plant height, number of leaves, stem girth, leaf area (cm2), number of branches/plant,
days to 50% flowering, number of pods/plant, peduncle length, empty pod yield
(g), pod length (cm), 100-seed weight (g), seed yield per pod (g), number of
seed per pod, grain yield per hectare (t/ha). The result obtained revealed that
there was significant increase with increasing doses at (10 MGy and 15 MGy) on
the growth parameters as compared to the controls. There was a proportional
reduction in days to 50% emergence with respect to treatments on varieties of
Black eye (4.8 days at 15 MGy) and Dark Brown eye (5.2 days at 10 MGy)
varieties as compared to the control (3.8 days and 3.9 days), while Ife Brown
(3.2 days at 5 MGy) and Light Brown eye (8.5 days 10 MGy) varieties were
significantly increased by the mutagenic doses as compared to the controls (4.6
days and 11.4 days). The data on days to 50% flowering revealed that the X-ray
doses gave rise to shorter days to flowering. Also the X-ray doses of 10 MGy
and 15 MGy revealed higher values than other treatments and control on the
yield parameters measured. The result so far obtained showed that Light Brown
eye at 15 MGy is the best variety in yield (3.6 grain yield per hectare) as
compared to other varieties and treatments. It is therefore expedient to
mention that x-irradiation induced marked variability among the varieties
morphologically as conspicuous tall, early maturing, high yielding and
beneficial yield parameters were observed at x-irradiation doses (10 MGy and 15
MGy). The modified traits should be incorporated into breeding programmers for
further improvement.
ANDREW, O (2021). Effect Of X-Ray Irradiation On Growth And Yield Parameters Of Four Varieties Of Cowpea (Vigna Unguiculata (L.) Walp). Mouau.afribary.org: Retrieved Nov 24, 2024, from https://repository.mouau.edu.ng/work/view/effect-of-x-ray-irradiation-on-growth-and-yield-parameters-of-four-varieties-of-cowpea-vigna-unguiculata-l-walp-7-2
OSIVMETE, ANDREW. "Effect Of X-Ray Irradiation On Growth And Yield Parameters Of Four Varieties Of Cowpea (Vigna Unguiculata (L.) Walp)" Mouau.afribary.org. Mouau.afribary.org, 29 Jun. 2021, https://repository.mouau.edu.ng/work/view/effect-of-x-ray-irradiation-on-growth-and-yield-parameters-of-four-varieties-of-cowpea-vigna-unguiculata-l-walp-7-2. Accessed 24 Nov. 2024.
OSIVMETE, ANDREW. "Effect Of X-Ray Irradiation On Growth And Yield Parameters Of Four Varieties Of Cowpea (Vigna Unguiculata (L.) Walp)". Mouau.afribary.org, Mouau.afribary.org, 29 Jun. 2021. Web. 24 Nov. 2024. < https://repository.mouau.edu.ng/work/view/effect-of-x-ray-irradiation-on-growth-and-yield-parameters-of-four-varieties-of-cowpea-vigna-unguiculata-l-walp-7-2 >.
OSIVMETE, ANDREW. "Effect Of X-Ray Irradiation On Growth And Yield Parameters Of Four Varieties Of Cowpea (Vigna Unguiculata (L.) Walp)" Mouau.afribary.org (2021). Accessed 24 Nov. 2024. https://repository.mouau.edu.ng/work/view/effect-of-x-ray-irradiation-on-growth-and-yield-parameters-of-four-varieties-of-cowpea-vigna-unguiculata-l-walp-7-2