Understanding Sire Proofs – an important tool for genetic selection

In the US all bulls are progeny tested and records are collated. They are peer reviewed and in addition any improvements are highlighted. The testing results are available every 4 months and farmers wait for these proofs. But it is important to understand the proofs (how to read the sire proofs) and decide of which animal is suitable for breeding at the farm and what kid of improvement can be expected


World Wide Sires E News – Jan 2016 provides just that. Use the link below on how to read the US Sire Proofs.

WWS E News Jan 2016 – Understanding Sire Proofs

Should you need more information please feel free to contact

Amit Sachdev, E mail: amit@techproindia.in




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Its all about Rumen Development of Calves to get them growing faster

Calves need a good start and it is important and producers need to give that head start to the calves, if they want these animals to perform later in life. Must get Colustrum at least 2 – 3 liters in first 1 hr of life, start on grain based calf starter within 3-4 days, Milk to continue for 60 days or mik replacer if possible.

WWS – News for July 2015 is focussed on calf and its rumen development. Click below for details

WWS – E news-July 2015-Its all about Rumen

Should you require more details, please feel free to contact me

Amit Sachdev, India Consultant, World Wide Sires * E mail: indiawws@gmail.com



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Manage summer stress to get more cows pregnant; Cool cows conceive better

Summer is a difficult time for a cow-herd. As temperatures rise, cows eat, ruminate and lie down less, which has a negative effect on their comfort, production and reproduction. Here are a few ways to manage heat stress in your herd:

Enough water to the animals

  1. Keep animals hydrated – Cows will drink 30 percent more water during times of heat stress. Avoid dehydration by providing easy access to cool, clean drinking water. Provide at least one, 1 meter water trough for every 15 to 20 cows. Make water available to cows when exiting the parlour, in addition to troughs in the barn and/or pasture. (Photo courtesy: Hoard’s Dairyman)
  1. Provide shade – Shade is an inexpensive way to give cows relief from the sun. Make sure cows have access to covered areas. You can also use shade cloth to block the sun from exposed areas.
  1. Provide fans/soakers – When soakers/misters are used with fans, the water on the cow’s skin and the air movement from the fans cools the cow. Fans and soakers placed at the feed bunk encourage eating. They are also useful in the holding pen; cows create heat as they crowd together waiting to be milked.
  1. No OvercrowdingAvoid overcrowding – Like in the holding pen, body heat from the cows can increase heat stress. Limit overcrowding to increase air flow. Housing should not exceed 120% capacity, meaning if you have 120 cows in a pen, there should be at least 100 beds. (Photo Courtesy: Dairy Business)
  1. Focus on nutrition – Maintain feed intake by providing a balanced ration with increased energy density and high quality forages, and by feeding during the cooler times of day.

It can be a challenge to get cows pregnant during times of heat stress because it is harder to detect heats and cows are less likely to conceive. While the previously mentioned heat abatement strategies can be used to improve reproduction for heat stressed cows, you can also better your chances of getting cows pregnant by selecting bulls with higher conception rates and daughter pregnancy rates.

Selecting bulls with a high Sire Conception Rate (SCR), is a great strategy to overcome low fertility in heat stressed cows.

What is SCR?

SCR measures the fertility of the bull and his ability to create pregnancies. A negative SCR means a bull is below average at creating pregnancies, while an SCR of 1.0 indicates a bull is above breed average and 1% better at creating pregnancies. For example, in a herd with a 35% conception rate using average SCR bulls, a +2.0 SCR bull would be expected to have a conception rate of 37%.

There are several of WWS bulls, with higher SCR that can help you combat reproductive issues in the summer.




#1 WWS SCR Bull

5.0 SCR / 2045 TPI / 1131 PTA Milk /6.0 SCE

Daughter of Shot Gun



High daughter fertility

4.3 SCR / 2165 TPI / 5.8 SCE / 1.4 DPR / 2.00 HCR / 2.00 CCR

(Photo – Daughter of Shot Gun)



Balanced Commercial Sire

3.5 SCR / 2081 TPI / 734 PTA Milk / 1.70 FLC / 2.10 HCR

For more details please contact World Wide Sires

Amit Sachdev, Technical Consultant, World Wide Sires * indiawws@gmail.com

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World Wide Sires Delivers Industry Leading Genetics

World Wide Sires (WWS) bulls dominate the industry with outstanding fertility, creating high producing daughters with healthy and balanced udders, strong feet and legs, and excellent TPI. WWS delivers a diverse line up of bulls and offers elite genetics for every management system.

High fertility is a top priority for any well-managed herd. WWS bulls are ahead of the competition for semen fertility as measured by SCR, or Sire Conception Rate. Sire Conception Rate is the standard for comparing bull fertility, and WWS is home to more high SCR bulls than any other AI company.

 Based on the April 2015 genetic evaluations, WWS has 58 proven bulls at or above +1.5 SCR.

WWS delivers PregnanciesWWS is also home to 30 proven bulls above +2.5 SCR, three times the number of theSCR Averagesnearest competitor. Only 23 proven bulls in the breed rank above +3.0 SCR, and WWS leads the way as your source for 14 of these elite fertility sires. The WWS lineup has an average SCR of +1.46, which is well over the industry average of +0.55 SCR and higher than any individual competitor.

Daughter of WrightWhen considering the Fertility Index (64% daughter pregnancy rate (DPR); 18% heifer conception rate (HCR); 18% cow conception rate (CCR)), bulls like 7HO11123 WRIGHT, with a fertility Index of 4.9 (Daughter photo on the leftand 7HO11150 ZIGGY with a fertility index of +4.6, create fertile daughters that breed back quickly.

Daughter of Supersire

WWS bulls also transmit high production. 15 of the Top 50 PTA Milk sires call WWS home, while the next competitor has 9 bulls on the list. 7HO11351 SUPERSIRE, woth a PTAM of +2190 (Daughter photo on the left) the number one TPI sire in the world at +2613 TPI, also ranks second in the breed for production and is an extreme transmitter for milk (PTAM of +2190)

 Daughter of BrokawOn the Top 50 Udder Composite list, 16 are WWS bulls and the

next competitor has 9 on the list. Sires like 7HO11118 BROKAW , a UDC of +2.91 (Daughter photo on left) and 7HO11477 MCCUTCHEN, a UDC of +2.81. These produce daughters with extremely high, wide rear udders and strongly attached fore udders.

Daughter of Tempo

In regards to udder health, 16 of Top 50 SCS Sires call WWS home, while the next competitor has 8 on the list. WWS is also home to the number one SCS bull in breed, 7HO10624 TEMPO at +2.54 SCS (Daughter photo on the left).

Daughter of Airlift

WWS claims the top 5 spots on the Top 50 Feet and Leg

Composite list and has at total of 18 bulls on the list, with the next competitor at 10. 14HO06809 AIRLIFT, with FLC of +3.74 (Daughter photo on the left), 7HO11314 MOGUL, with FLC of +3.5 , 7HO10506 GW ATWOOD, 7HO11279 MOONBOY and 7HO10999 BRADNICK are FLC breed leaders who sire daughters that walk comfortably with moderate set to the hock and steep foot angle.

Daughter of MoonboyDaughter of MixerWWS also continues to dominate the breed for TPI with 35 of the Top 100 TPI Sires, while the next competitor has 19 on the list. 6 of the top 10 TPI Sires also call WWS home with No.1 7HO11351 SUPERSIRE, No.2 7HO11314 MOGUL, No.5 7HO11279 MOONBOY, TPI of +2396 (Daughter photo of right), No. 6 7HO11313 MIXER, TPI of  +2396 (Daughter photo of the left), No. 7 7HO11477 MCCUTCHEN, and No.9 7HO10721 BOOKEM.

WWS remains at the forefront in delivering exceptional genetics and is committed to customer success, providing consistent, high quality, breed-leading genetics to help customers accomplish their goals.

For more information on the WWS semen availability in India, please contact

Amit Sachdev, Technical Consultant, World Wide Sires * E mail: indiawws@gmail.com

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HAPPY NEW YEAR 2015 !!!!!


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Wishing you a very Happy Diwali. May this festival of lights bring happiness, joy and prosperity to you and your family

Amit Sachdev, India Consultant, World Wide Sires * E mail: indiawws@gmail.com


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Using Sexed Semen in Dairy and Managing Heifers: Getting the most out of your investment

Gender SelectedSexed semen is finishing its first decade on the market, and has so far been an extremely successful product around the world. It has given dairy farmers the ability to select for females to maximize the value of each pregnancy, increasing the genetic potential of their herd and helping to improve their bottom line. At World Wide Sires, we strive to offer a complete line-up of bulls who can meet every customer’s sexed semen need, regardless of management style. However, getting the greatest return from this investment in your herd’s future requires paying special attention to both breeding and heifer management.

Using Sexed Semen

The process used to sort semen by the gender of the sperm involves advanced technology and lab work. Individual sperm are treated with dye and then separated based on the presence of an X or Y chromosome. For our gender-sorted product, at least 90% of the sperm in each dose of semen contains an X chromosome (females receive an X chromosome from the father, males receive a Y chromosome). Using sexed semen instead of conventional semen can increase the average genetic value of your herd simply by creating more heifers over the same period of time.

A side effect of this sorting process is that the sperm are subject to increased stress. Industry research by reproductive specialists, such as Mel DeJarnette at Select Sires/World Wide Sires, has shown a conception rate for sexed semen that is on average 80% of the rate for conventional semen. To maximize the conception rate of sexed semen, breeders should focus on two areas: proper semen handling and selecting the right animals to breed with sexed semen.

Semen Handling

Sexed semen is packaged in 0.25 mL straws, which are more sensitive to temperature changes than 0.5 mL straws. Improper handling of doses can have a negative impact on sperm motility and decrease fertility. These smaller straws are especially sensitive to thermal shock, which can occur through touching the straw with a human hand or thawing at the wrong temperature. To avoid this, frozen semen should be handled with tweezers and thawed at 35⁰ to 37⁰ C for 45 seconds. The semen should be kept at human body temperature (the same range as thawing), either by using an AI syringe warmer or using the breeder’s own body heat, until breeding. Breeding should occur within 5 to 10 minutes of thawing for maximum conception.

Heifer Management

In North America, sexed semen is recommended for use on virgin heifers, which traditionally have a higher conception rate than milking cows. This is in large part due to the decreased stress that heifers are under, since their bodies are not using energy for milk production. However, heifers may not be the ideal target for every herd.

When breeding Holstein heifers, the goal should be for them to calve at 560 kg (check for corresponding weight in crossbred heifers). Research has shown that this is the ideal weight to maximize production in the first lactation, and that a heifer weighing less than 400 kg is at a significant disadvantage because she will have to use more energy during her first lactation to finish growing to her mature body size. This advantage is lost when the heifer weighs more than 680 kg at calving, since overweight heifers tend to have more problems calving and are more susceptible to reproductive and nutritional disorders like fatty liver and ketosis.

The goal for Holstein heifer nutrition is to reach 300-330 kg of body weight by 14 months of age (225-275 kg for Jerseys and other small-framed breeds). This both maximizes first lactation production and minimizes feeding costs. However, this may not be a reasonable goal for all producers, in which case a different breeding strategy may be best.

Sexed Semen & Cows

Research with beef cattle has shown that sexed semen can achieve similar conception rates in both heifers and lactating cattle under low-stress conditions. For farmers with dual-purpose animals or late maturing heifers, using sexed semen on cows may be the best way to maximize the value of this product. Proper semen handling and breeding techniques must be used regardless of the age of the animal.

Tips for Maximizing Conception Rate

• Watch heifers for heat activity for 20 minutes at least twice a day.
• Use the AM-PM rule for breeding with sexed semen – breed 12 hours after observed heat.
• Use Sire Calving Ease (SCE) scores to avoid difficult births, especially with heifers – the lower the number the better!
• Protect the sperm from rapid temperature changes
• Avoid breeding during high stress periods, especially summer, when conception rates are already lower than normal.

Prepared by: Tyler Boyd, World Wide Sires


For more information contact

Amit Sachdev, India Consultant, World Wide Sires * E mail: indiawws@gmail.com

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Importance of DPR in Dairy Business – Putting a value to it

DPR data from US DairyIn 2003, a new measurement for female fertility became available to dairy farmers around the world – PTAs for Daughter Pregnancy Rate (DPR). DPR is a measurement of the number of eligible cows who become pregnant during a 21-day period.

 DPR PTAs (predicted transmitting abilities) allow breeders to compare different bulls to determine their genetic impact on herd fertility. A 1 point difference in DPR is equivalent to 4 days open. In other words, a +1.0 DPR bull’s daughter would have 4 fewer days open than the daughter of a +0.0 bull, if both daughters were out of the same cow.

 Each additional day open could cost a US dairy up to $14 per cow, or an average of $27 per DPR point. This economic impact is reflected in the formulas for Lifetime Net Merit (NM$), Total Performance Index (TPI), and Jersey Performance Index (JPI).

OptifeedOne of the key ways to increase profitability and efficiency is by maximizing the value of a lactation. Cows lose profitability the longer a lactation lasts, so DPR is one of the traits included in the new World Wide Sires index OptiFeed – an exclusive formula which designates bulls who will sire highly efficient daughters. Look for the OptiFeed designation on WWS bulls starting December 2013.

Two of the bulls that can be considered are

7HO09281 BIGSHOT +2.1 DPR and  14HO 06262 KODY +1.7 DPR. Look for more on the website http://wwsires.com/

Amit Sachdev, India Consultant, World Wide Sires * E mail: indiawws@gmail.com

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Heifer’s are the future – take care of the calves

An interesting article appeared in the The Dairy Mail – Nov 2013 on the use of Calf Milk Replacer in dairy industry and how heavier calves tended to be inseminated early and also produce more milk. Better growth certainly will help the calves, and they will have more capacity to consume food and metabolise the same more efficiently.

I upload the article after taking permission from Campina, who sponsored the article.


Use the link above to read the article

Amit Sachdev

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Amit Sachdev, India Consultant, World Wide Sires * E mail: indiawws@gmail.com

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