I. C. Nwosu

Crossbreeding Efficiency Index in German Brown x N’Dama Cattle: The Potential Genotypic Crossbred(s) under Tropical Conditions

I. C. Nwosu · Asian Journal of Research in Zoology · 2026

Genetic architecture of production and reproduction traits in cattle crossbreeding can be understood through additive, dominance, and recombination effects, enabling the development of efficient and climate-resilient breeding strategies such as the Crossbreeding Efficiency Index...

Open access Research Article 10.9734/ajriz/2026/v9i2282

Genetic Effects of Additive, Dominance and Recombination Effects in German Brown × N'Dama Crossbreds for Enhanced Survival and Reproductive Performance under Nigerian Conditions

I. C. Nwosu & E. A. Ibeziako · Asian Journal of Research in Zoology · 2026

Crossbreeding between indigenous N’Dama and exotic German Brown cattle has been explored to improve reproductive performance and productivity in tropical dairy systems through the combined effects of adaptation, additive genetics, and heterosis.The aim of this study was to estima...

Open access Research Article 10.9734/ajriz/2026/v9i2279

The Growth Trend of Crossbreds from German Brown x N’dama Crossbreeding in Nigeria - III

I. C. Nwosu · Asian Journal of Biochemistry, Genetics and Molecular Biology · 2026

368 records of weights from birth to 12 months for pure German brown, N’dama and their crossbreds from the crossbreeding programme carried out at the University of Ibadan, Nigeria between 1970 – 1988 was analyzed using least square means of analysis of variance and regression.  B...

Open access Research Article 10.9734/ajbgmb/2026/v18i2522

Crossbreeding of German Brown x N’dama Cattle – IV: The Trend of Milk Production by the Crossbreds

I. C. Nwosu · Asian Journal of Research in Animal and Veterinary Sciences · 2026

Background: The global dairy industry faces a stark disparity, with developed countries producing over 80% of milk despite having only 33.33% of the cattle population, highlighting the need for effective breeding strategies in developing countries. Aim: The study aims to investig...

Open access Research Article 10.9734/ajravs/2026/v9i1401

Crossbreeding of German Brown X N’dama Cattle at Ibadan – II – Pattern of Reproductive Performance of the Purebreds and Crossbreds

I. C. Nwosu · Asian Journal of Research in Animal and Veterinary Sciences · 2026

A crossbreeding programme between purebred German brown and N’dama was carried out at the University of Ibadan Teaching and Research farm between 1970 – 1988. Reproductive data of 537 purebred and crossbreds’ records from the programme were used for this analysis involving purebr...

Open access Research Article 10.9734/ajravs/2026/v9i1389

Crossbreeding German Brown x N’dama Cattle at Ibadan, Nigeria: Heterosis for Reproductive and Productive Traits in the Crossbreds

I. C. Nwosu · Asian Journal of Biochemistry, Genetics and Molecular Biology · 2025

The aim of this study was to investigate the effects of animal trait and level of local cattle gene inheritance on the expressed levels of heterosis in crossbreeding of exotic German brown and local N’dama. Records from 199 pure bred German brown and N’dama and 308 crossbred calv...

Open access Research Article 10.9734/ajbgmb/2025/v17i12508

Crossbreeding of German Brown x N’dama Cattle at Ibadan – I - Mortality Patterns of German Brown, N’dama, and Their Crossbreds

I. C. Nwosu · Asian Journal of Research in Animal and Veterinary Sciences · 2025

A crossbreeding programme between purebred German brown and N’dama was carried out at the University of Ibadan Teaching and Research farm between 1978 – 1985. The mortality records of 344 purebred German Brown, N’dama, and their crossbreds were examined involving purebred German...

Open access Research Article 10.9734/ajravs/2025/v8i4383