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Forecasting the genetic and economic impacts of genomic selection in perennial ryegrass

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journal contribution
posted on 2023-05-10, 07:39 authored by Brent BarrettBrent Barrett, Zulfi JahuferZulfi Jahufer, Sai Arojju, Marty FavilleMarty Faville
Simulation offers a way to explore questions about implementation, value and impacts of various breeding methodologies for pasture species in New Zealand (NZ). We present genetic modelling and farm system-based economic simulations demonstrating the potential of genomic selection (GS) and high-throughput phenotyping (HTP) to improve breeding outcomes in perennial ryegrass, and assess the potential value for farmers. Predicted genetic gain (∆G) from half-sibling family selection without GS ranged up to 4.9% per cycle, depending on selection pressure. Including GS for within-family selection, ∆G ranged up to 7.6% per cycle. Across 12 scenarios tested for a single cycle, increasing ∆G per cycle doubled cost-efficiency per unit gain, even though cost per cycle increased. Simulation of 10 cycles of selection within a population with and without GS showed higher levels of ∆G were maintained over multiple cycles for GS. Farm system-based economic analysis, focused on agronomic traits, indicated full commercialisation of GS and HTP technology harnessing increased ∆G in 2026 creates new value rising by 2040 to a range of $74M - $221M per annum for NZ red meat farmers, and $399M to $1,260M per annum for dairy farmers in NZ and Australia. This study indicated incorporating GS in pasture plant breeding can increase the rate and cost-efficiency of genetic improvement, with pasture performance and sector economic benefits realised through the value chain.


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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.


  • English

Does this contain Māori information or data?

  • No


NZ Grassland Association Inc.

Journal title

Journal of New Zealand Grasslands




Barrett, B. A., Jahufer, Z., Arojju, S. K., & Faville, M. J. (2021). Forecasting the genetic and economic impacts of genomic selection in perennial ryegrass. Journal of New Zealand Grasslands, 83, 91–98.

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