1. Acquaah G (2007) Principals of plant genetics and breeding. Blackwell Publishing, Oxford
2. Annicchiarico P (2002) Genotype × environment interactions: challenges and opportunities for plant breeding and cultivar recommendations. FAO Plant production and protection papers. http://www.fao.org/DOCREP/005/Y4391E/y4391e05.htm. Accessed 13 June 2010
3. Bartlett MS (1937) Properties of sufficiency and statistical tests. Proc R Soc Lond A 160:268–282
4. Baafi E, Ofori K, Carey EE, Gracen VE, Blay ET, Manu-Aduening J (2017) Genetic control of beta-carotene, iron and zinc content in sweetpotao. J Plant Stud 6(1):1–10
5. Chiona M (2009) Towards enhancement of B-carotene content of high dry mass sweetpotato genotypes in Zambia. Dissertation, University of KwaZulu-Natal, South Africa [Online PhD Thesis]