Genetics for Climate Change

2.5 kg less

Food used by Kalant than his fellow bull to grow at the same rate of 2.3 kg p day.

This makes Kalant one of the top bulls for feed efficiency, our answer to climate change.


He offers a rare combination of genes (Gonasty, Profeet, Zamuto and Kalhei). Semen is available.

These 10 young bulls passed the Phase C test at the Glen test station in 2016 as part of the BGP 

(Beef Genomic Project).  The best of the crop came back to our farm and were made available to prospective buyers. One, Klein Kalant P, is now our main seedstock sire.


The economic benefits of feed efficiency is illustrated by the above graph and the following table. It compares two of our bulls at the test, Jaco and Klein Kalant. Both notched up the same gain in mass of 2.3 kg p day, but Jaco consumed 2.5 kg p day more feed than Klein Kalant. Jaco had a FCR (Feed Conversion Ratio) of 6.01 and a Net Feed Intake (NFI)(or Residual Feed Intake RFI) of 1.876. Kalant on the other hand had ratios of 4.97 and -0.401 respectively. (More info for a table on NFI)

NFI should help us to survive our ever increasing severe climate in future.  Provisional research indicates that NFI will also demonstrate a similar effect on veld grazing. Kalant maintains his condition even on harsh Winter veld. This is due to positive EBV's for Rib (=0.1) and Rump Fat (0.2) plus Eye Muscle Area (0.8). These attributes make him an excellent candidate for helping our seedstock to adopt to severe climate change without losing their fertility. We are, therefore, using Kalant extensively in our herd with the aim to increase the herd's feed efficiency (with a heritability factor of 0.3). This new direction in our seedstock production should also benefit our clients in future.


We have now one son of Kalant, PJD1836 P, on offer, which should be able to produce calves with superior feed efficiency. Another four Kalant bulls would be ready for the market in 2021. They will increase the profitability and sustainability of any cattle operation.

Kalant is a polled bull with a very promising future as a seedstock mainstay of our herd. A Simmentaler technical advisor, adjudged Kalant a eight out of nine. According to him Kalant has great length of body, masculinity, a well formed head, and sturdy hind quarters. He is a curve bender with high 400 day growth (in the top 15%), but with lower mature weight (in the top 25%). His economic indexes (SBI and SPI) are the top 5% of the SA 2019 crop. Kalant has also the distinction of having EBV's in the top 15% of the SA crop regarding EMA (eye muscle area), Rib Fat as well as RBY (Retail Beef Yield). (See Kalant's pedigree and EBV's)

Apart from these favourable genes, Kalant inherited stayability or longevity from his grand father, Gonasty. Gonasty sired his last calf naturally at the age of 16 years. Furthermore, Kalant's dams in his pedigree had one important trait in common - stayability or longevity. Ten out of the thirteen dams in his pedigree had six or more calves over their respective careers. More info is attached.

Kalant's main contribution to our seedstock is the increase of the feed efficiency of his calves as his NFI-P of -0.11 is in the top 5% of the SA 2019 crop. He should also increase their calving ease, growth  and body condition . In total the economic indexes (SBI and SPI) of his calves should be in the top 5%, similar to those of their dams. (See table for more details)

Econotech Dan S, PJD1743

Promising seedstock sire

R765 SBI (economic index)

(in top 5% of SA 2019 crop)


Semen available.

Simberg Zolerz P, JS1236

Father of Dan and one of the best seedstock sires in SA


Economic index (SBI) (top 1% of SA 2019 crop)

High calving ease, low birth weight and solid growth

Zolerz, sire of Dan, has an extraordinary graph: very high on calving ease, a low birth weight, and then sharp growth at 200 and 400 days. But then, Zolerz ends with a low MCW, the ideal frame for feed efficiency.

These attributes make Zolerz the perfect curve bender.

Dan follows in his sire's footsteps with a slightly less accentuated bended curve with solid growth (in the top 45% of SA regarding his 400 day growth) plus a lower than average MCW (in the lower 15% of SA 2019 crop). He has also high calving ease and a low birth weight.

In summary his economic indexes for SBI and SPI are both in the top 5% of the SA 2019 crop.

Econotech Dan S, PJD1743, has the breeding qualities with which we can take our seedstock operation forward. He  has scurs and has been sired by Simberg Zolerz P, JS1236. Zolerz again was sired by the well-known Blinkbou Herz. The latter was a grandson of the world famous Eisenherz, an AI bull from Germany and widely used in Southern Africa as well as the USA and Canada. On his mother’s side Dan has also two famous sires, namely Kykso Kalhei (renowned for calving ease) and Kwantum Profeet (one of SA’s first curve benders with a low birth weight and excellent growth). Furthermore, Dan hails from very fertile cow families. His mother, PJD128, has an ICP of 378 with 7 calves and his one grand mother, PJD0743, had an ICP of 370 with 10 calves. Dan's grand mother on his father's side, IP0538, had an ICP of 378 with 8 calves, while his great grand mother, CBJ0345, had an ICP of 376 with 10 calves.

(See Dan's pedigree and EBV's)






















Promising three year old bull with very high calving ease breeding trait (in top 1% of SA 2019 crop), low Mature Cow Weight (MCW) and high economic indexes (SBI and SPI)(in top 10 to 5%).

Sold to Roelf du Toit, Gauteng

Semen still available

Jozette Gonasty PP, Zoetis Southern Africa Proven Bull of 2018

R779 SBI index (top 1% of SA 2019 crop)

Prostock Hugo PP-USA  

Erico Napoleon - grandfather of Syster and Nate

Econotech HUNT  PJD1033 P, son of Gonasty PP

Sold to Freddie Steyn, Nelspruit

PJD1226 P - Econotech Sizwe P, son of Gonasty PP (father to Klein Kalant 1, PJD1565P)

Sold to Koos de Wet, Hopetown

The BGP (Beef Genomic Project) gave us the power to do a quantum leap into the future. Econotech Simmentaler joined the BGP and are reaping the first benefits through the superior NVI of Kalant.

The Beef Genomic Project (BGP) is jointly run by the ARC and various cattle breeders associations. It aims to identify genomic markers for selected breeding traits. These genomic markers would increase the accuracy of EPDs on younger, non-proven animals. The increase in EPD accuracies allows breeders to identify the best genetics earlier in an animal's life without the extreme cost of progeny testing. Information gleaned from a single DNA sample may be as informative as the first calf crop of a bull or the lifetime production record of a cow. This is especially of importance regarding traits that are difficult and costly to test such as meat quality and feed conversion ratios/residual feed intake(RFI).


Basically the RFI measures feed efficiency as the difference between an animal's actual feed intake and its expected feed intake based on its size and growth. The smaller an animal's RFI the more efficient is that animal to produce a particular mass gain.

Furthermore, the BGP assist us to share bulls with other leading breeders. This enables our seed stock operation to become more comparable with the rest of the industry by having inter herd comparisons of the offspring of the BGP bulls.