Solera Genetic Development

Origins and CSIRO Introduction (1945–1990)

The Tuli breed traces its origins to 1945 when land development officer Len Harvey identified a distinct type of yellow Sanga cattle among mixed native stock in the Lowveld area south of Gwanda, Zimbabwe. A 3,000-acre breeding station was established at Guyu near Gwanda, with a founding herd of twenty cows and one bull. The Tuli Breed Society was formally established in 1961. The Mashona breed, developed by the Shona people of eastern Zimbabwe, was formally recognised with its own breed association and herd book established in 1954, following rigorous selection for traits of economic importance by commercial breeders.

In 1988, CSIRO’s Division of Tropical Animal Science initiated an ambitious embryo transfer program to bring Tuli, Mashona, and Boran genetics to Australia. Led by Dr John Frisch and Tim Williams, the team collected 269 Tuli embryos from Zimbabwe and Boran embryos from Zambia. These were implanted into Friesian surrogate mothers on Australia’s offshore quarantine station at the Cocos (Keeling) Islands. Over five months, 74 calves were born in quarantine isolation.

By March 1990, all calves were cleared of disease and transferred to the Australian mainland, establishing the foundation genetic pool. CSIRO’s Dr Frisch noted the project aimed at “improving the cattle industry in Australia forever” by introducing a new bank of genes for animals better adapted to tropical environments. These genetics were subsequently also exported from Australia to the United States in 1991, as the USA could not directly import from Africa due to health restrictions.

Dormancy and Decline (1990–2019)

Following CSIRO’s successful introduction, the Tuli and Mashona genetics were maintained in some small herds and some large cross breeding programs only achieved significant commercial scale in Australia by 2015. By the late 2010s, the Rare Breeds Trust of Australia classified the Tuli as Critical, with fewer than 150 Full blood animals remaining nationally. Zimbabwe’s deteriorating veterinary status meant no further embryo or semen exports were possible due to foot-and-mouth disease restrictions, making the Australian genetic pool irreplaceable.

1.3 Revival and Commercialisation (2020–2026)

In 2020, Jack Milbank of Hartwood Agriculture, Bundaberg, established a dedicated Sanga breeding program drawing on the CSIRO-imported genetics. Born and raised on a cattle and game farm in Zimbabwe, Milbank held direct knowledge of Tuli and Mashona performance in their native environments and recognised the opportunity to revive and commercialise these adapted genetics for the Australian tropical beef industry.

In 2022, the first structured embryo transfer program commenced with 8 donor cows matched across a wide selection of sires to broaden the genetic pool. Imported Mashona embryos from the USA were also introduced. In 2024, a larger IVF program with 21 donor cows produced outcross combinations for an expanding client base wanting composite animals. The Solera composite breed framework was formalised: 50% Sanga (Tuli/Mashona), 25% Bos Taurus, and less than 25% Bos Indicus, creating a commercially relevant, climate-adapted beef animal whose function is to perform in hot rangeland, and coastal grass-fed systems.

By 2025–2026, Tuli and Solera genetics have become widely available commercial animals, with multiple cooperating producers across Queensland and a developing supply chain structure through the Solera Nature Positive Beef program. Processing arrangements are available for producers seeking targeting both domestic and export markets.