Archives of Agriculture and Environmental Science 7(3): 332-338 (2022)
hps://doi.org/10.26832/24566632.2022.070305
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e-ISSN: 2456-6632
ARTICLE HISTORY ABSTRACT
Received: 13 June 2022
Revised received: 15 August 2022
Accepted: 28 August 2022
A field experiment was conducted at the Naonal Root Crops Research Instute, Umudike,
Southeastern Nigeria during the 2015 and 2016 cropping seasons to evaluate diversity
among F
1
populaon of sweet potato, namely: Sau × 442162 (6), Ligri × Faara (17), Sau ×
Bohye (17), including two checks (Umuspo 3 and TIS 87/0087). This experiment was laid out
in a randomized complete block design with three replicates under rainfed condion. Data on
fresh storage root yield were recorded at 120 days aſter planng. Analysis of variance, corre-
laon and principal component analysis were ulized for data analysis. The study revealed
that yield of fresh storage root showed significant differences (P< 0.05) among the sweet
potato genotypes. Sau X Bohye produced the highest storage root yield (19.33 t/ha) in
2015 and performed beer than the naonal check TIS 87/0087 that recorded a storage
root yield of 10.84 t/ha. The result from the study showed that out of the forty genotypes
evaluated, twenty-six (26) genotypes recorded aack of C. punccollis. The extent of the
damge recorded among the genotypes aacked by C. punccollis ranged from severe damage
to lile damage among the genotypes that recorded fresh storage root damage. SauXBo-
hye/11, SauXBohye/13, SauXBohye/17 recorded severe damage caused by C. punccollis
while LigriXFaara/15 recorded moderate damaged caused by C. punccollis. Fiſteen (15)
genotypes did not record any infestaon by Cylas punccollis. All characters except unmar-
ketable storage root weight at harvest exhibited posive and significant (P< 0.01) correlaon
with total roots weight (yield). Principal component analysis had three main principal compo-
nents explaining 84.25% of the total variaon with number of marketable roots, weight of
marketable roots, storage root yield and Cylas incidence contribung the most to the first
PCA. These genotypes could possess resistance genes to Cylas punccollis and these
genotypes could be incorporated in breeding programs for further trail.
©2022 Agriculture and Environmental Science Academy
Keywords
Resistance
Storage root
Sweet potato weevil
Yield
Citaon of this arcle: Joseph, U. I., Harry, G. I., & Uchenna, N. C. (2022). Screening of some sweet potato ( Ipomoea batatas (L.)
Lam) genotypes for yield and damage by Cylas punccollis under rainfed condions in Umudike, Southeastern Nigeria. Archives of
Agriculture and Environmental Science, 7(3), 332-338, hps://dx.doi.org/10.26832/24566632.2022.070305
Screening of some sweet potato (Ipomoea batatas (L.) Lam) genotypes for yield and
damage by Cylas punccollis under rainfed condions in Umudike, Southeastern
Nigeria
Ulasi I. Joseph
1*
, Gamaliel I. Harry
2
and Nwune C. Uchenna
3
1,2
Department of Crop Science, Faculty of Agriculture, University of Uyo, P.M.B 1017, Uyo, Akwa Ibom State, NIGERIA
3
Department of Crop Science and Horculture, Nnamdi Azikwe University, P.M.B. 5025, Ifite, Awka, NIGERIA
*
Corresponding author’s E-mail: ifeanyijoseph@uniuyo.edu.ng
INTRODUCTION
Sweet potato (Ipomoea batatas (L.) Lam) is a principal crop con-
sumed as food across the globe and ulized as an importance
raw material for industrial purposes (Korada et al., 2010). Sweet
potato is culvated across different connents of the world on
approximately 8.21 million hectare (ha) with an esmated
annual yield of 104.02 million tonnes (FAOSTAT, 2014). The
world’s annual average yield of sweet potato is 15.9 tha
-1
, aver-
age yield in Africa (9.6 tha
-1
), China (22.0 tha
-1
) and Nigeria (3.0
tha
-1
) (FAO, 2015; Nwankwo and Bassey, 2021). Sweet potato
producon in Nigeria is challenged with numerous constraints
ORIGINAL RESEARCH ARTICLE