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MULTI-LOCATION ENVIRONMENTAL STUDIES OF YIELD AND ANTIOXIDANT PROPERTIES OF SEVEN VARIETIES OF SWEET POTATO (IPOMOEA BATATAS (L) LAM)

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Abstract

The chronic problem of fluctuations in environmental conditions coupled with the lack of cultivar evaluations over a wide range of environments, have limited the rapid development of elite sweet potato (Ipomoea batatas (L) Lam.) cultivars across different agro-ecological locations of Nigeria. To evaluate the multi-locational environmental performance of sweet potato over three agro-ecolological locations, (Mbano, Nsukka and Umudike) in Eastern Nigeria, seven local elite sweet potato varieties Ex-Onyunga, Centina, NRSP/05/022, PYT/09/057, PYT/09/0x2, PYT/09/013, and Tis 87/0087 were used in yield and yield components, nutritional and antioxidant, as well as genotype x environment interaction, using the instrumentality of G x E biplot analysis, studies. The experiments were set out in a randomized complete block design (RCBD) with three replications in each of the study areas. The result of the analysis of variance showed a significant (p