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1. 

   Ridge regression technique to determine the environmental influences on tef (Eragrostis tef) grain yield

   Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Legesse Kassa Debusho --- , Republic of South Africa

   Tef grain yield is dependent on a number of component characters such as plant height and panicle length. These characters and consequently yield are governed by a large number of factors including environmental factors. The objective of this paper was...

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2. 

   A comparison of collinearity mitigation techniques used in predicting BLUP breeding values and genetic gains over generations

   Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: KA Eatwell --- Department of Genetics, South Africa SD Verryn --- , South Africa CZ Roux --- Department of Genetics, South Africa PJM Geerthsen --- , South Africa

   Collinearity potentially has a negative impact on the prediction of genetic gains in tree breeding programs. This study investigated the reliability and impact of best linear unbiased prediction (BLUP) using various collinearity mitigation techniques and of two computational numerical precisions...

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3. 

   On the location of ratios of zeros of special trinomials

   Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: I. Ndikubwayo --- Makerere University, Uganda A.S. Bamunoba --- Lira University, Uganda

   Given coprime integers k, ℓ with k > ℓ ⩾ 1, and arbitrary complex polynomials A(z) and B(z) such that deg(A(z)B(z)) ⩾ 1, we consider the polynomial sequence {Pn (z)} satisfying the three-term recurrence relation

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