Quality Of Frozen Semen Affected By Stallion Age And Breed

A study out of Australia has found that semen from Arabian stallions withstands the freezing and thawing cycle used in artificial insemination (AI) better than semen from Icelandic, Quarter Horse or Warmblood breeds.

Drs.  Jörg Aurich, Juliane Kuhl, Alexander Tichy and Christine Aurich, from the University of Veterinary Medicine in Vienna, examined the semen quality of 1,012 frozen and thawed samples from 134 stallions of five different breeds. They calculated the acceptable percentage of ejaculates for AI as well as the doses available.

The researchers found that the most important variable was sperm motility before freezing: The higher this number, the more likely quality post-thaw semen would be found. Thawed semen is considered acceptable for insemination when the sperm's ability to swim in a straight line or in large circles is 35 percent or higher.

The age of the stallion was also an important parameter; there was a marked decrease in acceptable ejaculates in stallions over 9. The researchers suggest that stallions with high breeding values used in competitions should be collected while they are younger and not after they have retired from the competition ring.

While Arabian stallions had above-average acceptable ejaculates, Icelandic and Quarter Horse stallions had below-average ejaculates. Warmblood and Lipizzaner stallions had average numbers. The researchers note that this suggests a genetic basis for semen cryotolerance.

Total sperm count was the most important variable determining the number of doses of semen obtained. Stallions with good semen quality are more likely to yield acceptable semen after thawing, but good sperm motility in raw semen doesn't always correlate to post-thaw semen quality.

The scientists concluded that there are individual stallions that have semen that does not freeze well, though their raw semen is high quality.

Read more at HorseTalk.

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Half to Sioux Nation Debuts at Fairyhouse

Observations on the European Racing Scene turns the spotlight on the best European races of the day, highlighting well-pedigreed horses early in their careers, horses of note returning to action and young runners that achieved notable results in the sales ring. Monday’s Insights features a half-brother to Group 1 winner Sioux Nation (Scat Daddy).

1.00 Fairyhouse, Mdn, €24,000, 2yo, 6fT
GIORGIO VASARI (IRE) (Air Force Blue) is a half-brother to Sioux Nation (Scat Daddy), who captured the G1 Phoenix S and G2 Norfolk S. as a juvenile and now stands at Coolmore. Aidan O’Brien saddles the unraced January-foaled bay in the first of the Irish EBF Median Sires Series Maidens which also features the Fozzy Stack-trained newcomer My Boy Charles (Air Force Blue) Andrew Farm and For the People Partnership’s $280,000 Fasig-Tipton Saratoga August Yearling Sale graduate who is a half-brother to the GIII Dixiana Bourbon S. winner Peace Achieved (Declaration of War).

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‘Owner Conversation’ To Determine Status Of Modernist After ‘Nice And Smooth’ Breeze

Hall of Fame trainer Bill Mott sent out Pam and Martin Wygod's graded stakes-winner Modernist to the Belmont Park main track in Elmont, N.Y., for a five-furlong breeze on Sunday morning.

Under mostly sunny skies, the graded stakes-winning son of Uncle Mo, piloted by regular rider Junior Alvarado, worked in tandem with two-time graded stakes winner Tacitus, who was piloted by Hall of Fame jockey John Velazquez, recording a 24.40 opening quarter before finishing off their breeze in 59.20 seconds and galloped out in 1:11.40 over a main track rated “fast.” The moves were the fastest of 16 recorded works at the distance.

“He broke off in a nice rhythm and turning for home I was one length behind Tacitus,” Alvarado said. “As soon as we turned in, we got together and galloped out.  I thought the work was extremely good.”

Following a third out maiden victory going a one-turn mile at Aqueduct, Modernist won his graded stakes debut in the Grade 2 Risen Star at Fair Grounds en route to a third-place effort in the Grade 2 Louisiana Derby at the New Orleans oval.

Alvarado praised his horse's versatility.

“He's a late [developing] horse. He's learning and learning. Last time we tried to sit a little bit off the pace to see what he was capable of…when we won at Fair Grounds we went wire to wire, so he's a versatile horse,” Alvarado said. “We can do anything we want in the race depending on how he breaks out of there. He always will be there to put me in the spot that I want.”

Mott did not confirm Modernist for the Grade 1, $1 million Belmont Stakes on Saturday, June 20, but said that a start in the American classic remains a possibility. The Grade 3, $500,000 Ohio Derby, slated for June 27, also is in play for Modernist.

“We're going to have an owner conversation before too long,” Mott said. “The work looked good, nice and smooth. Modernist and Tacitus both worked together and looked great. They finished up well, galloped out nice and strong.”

Modernist is currently sixth on the Road to the Kentucky Derby with a total of 70 qualifying points toward the 'Run for the Roses'. In the Louisiana Derby, Modernist fell victim to a wide trip during the 1 3/16-mile journey, but still managed to come up a strong third finishing 4 ¼ lengths in arrears of Wells Bayou.

“He had kind of a wide trip in the Louisiana Derby but he's been off a while,” said Mott. “We don't know whether we'll go. We'll see how he comes out of it and we're going to talk with the owners.”

Should Modernist enter the Belmont Stakes, he will attempt to give Mott his second win in the American Classic. He saddled Drosselmeyer to victory in the 2010 edition.

Juddmonte Farms' Tacitus, last year's Belmont Stakes runner-up, is a likely contestant for the 1 ¼-mile Grade 2, $200,000 Suburban on July 4 at Belmont Park. A last out fourth in the Grade 2 Oaklawn Handicap on May 2, the gray son of Tapit won the Grade 2 Tampa Bay Derby and Grade 2 Wood Memorial last year en route to a third in the Grade 1 Kentucky Derby.

“We're looking at the Suburban,” said Mott, who won the Suburban with Wekiva Springs (1996) and Flat Out (2013).

A Kentucky homebred, Tacitus is out of 2014 Champion Older Filly Close Hatches and boasts career earnings of over $2 million.

Juddmonte Farms homebred Hidden Scroll, who unseated Hall of Famer John Velazquez in his turf debut on June 3 at Belmont Park, worked a bullet half-mile in 47.88 Sunday on the Belmont green.

Hidden Scroll flashed his potential with a 14-length win on debut in January 2019 in a one-mile maiden contested on a sloppy track. The eye-catching effort earned a 104 Beyer Speed Figure. He followed up with a fourth in the Grade 2 Fountain of Youth and was sixth in the Grade 1 Florida Derby.

The talented bay was again spectacular in his seasonal debut with a 12 1/2-length score in a six-furlong optional-claiming sprint at Gulfstream that garnered a 102 Beyer, but was off-the-board in the Grade 3 Count Fleet Sprint Handicap in April at Oaklawn.

Alvarado was aboard the two-time winner for Sunday morning's return to the turf.

“He's a horse that's been very unlucky but he works like a freight [train],” said Alvarado. “He worked very fast today even though the way he was going it seemed like he was just enjoying the ride around there.”

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‘It’s Anyone’s Game’: Moquett Puts ‘Arky-Bred’ Man In The Can On Road To The Derby

JRita Young Thoroughbreds' four-time winner Man in the Can will take his next step on the Road to the Kentucky Derby in the $600,000 Blue Grass (Grade 2) on July 11 at Keeneland following his 1 ½-length allowance victory Friday at Churchill Downs in Louisville, Ky.

“That sure was an impressive turn of foot,” trainer Ron Moquett said. “I wasn't expecting him to go off as that big of a favorite but he ran against some stiff Arky-bred competition in his last couple of starts at Oaklawn. I think the bettors saw that before the race and that's why he ended up going off favorite. He definitely deserves a shot in the Blue Grass. There have been so many top Kentucky Derby contenders that have gone off the trail this week that it's really anyone's game.”

The rescheduled Blue Grass will award the Top 4 finishers 100-40-20-10 points on the Road to the Kentucky Derby. Should Man in the Can qualify for the Sept. 5 Kentucky Derby (G1), he would become the first Arkansas-bred to run in the race since Barbizon Streak, who finished 16th in 1971.

Another improving 3-year-old who won an allowance event this week at Churchill Downs was Bruce Lunsford's Art Collector. The 3-year-old son of Bernardini collected his third lifetime victory with a powerful 6 ½-length score on Saturday, only 34 one-hundredths of a second off the track record after he blitzed a final time of 1:41.35 for 1 1/16 miles.

“He's certainly getting better at the right time,” trainer Tommy Drury said. “That is as impressive as it gets to kick clear as he did. I asked Bruce to let us enjoy this one for a couple of days and then we'd get together and talk about our next options.”

The next stop on the Road to the Kentucky Derby is Saturday's $1 million Belmont Stakes (GI), which is expected to be headlined by Florida Derby (GI) winner Tiz the Law.

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