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Agro-Science
Journal of Tropical Agriculture, Food, Environment and Extension
 

ISSN 1119-7455
   
 
         
 
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Article No 8 of Volume 1.2 (2002)
 
    
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CLONAL EVALUATION OF YAM TUBERS RAISED FROM YAM TRUE SEED

E. C. Nwachukwu1 and I. U. Obi2 

1National Root Crops Research Institute, Umudike, P.M.B.  7006,

Umuahia, Abia State, Nigeria.

 

2Department of Crop Science,

University of Nigeria, Nsukka, Nigeria

 

 

ABSTRACT

Clonal evaluation of second generation yam (Dioscorea rotundata) plants  raised from gamma ray treated and untreated yam true seeds, showed that, at the MV1 generation, increasing doses of gamma rays decreased plant heights, number of leaves, and tuber yield.  At the MV2 generation however, these disappeared.  Correlation analysis revealed significant relationship

 (p= 0.01) between first generation tuber sett weight and second generation tuber yield (r = 0.46), first generation tuber  shape and second generation tuber shape (r = 0.27) and tuber yield and leaf spot disease infestation (r = 0.14), with n - 2 degrees of freedom of 718.

Agronomic traits that could be selected, at the first generation stage, are tuber shape and disease resistance but not tuber yield.

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Date:24/09/2018
 
     
 
 
 
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