WebThe objectives of this study were to assess the relationship between early genomic prediction of daughter pregnancy rate (GDPR) and pregnancy at the first service (P1), pregnancy at the end of lactation (PEND), number of services for conception (NSFC), days from calving to first service (TP1), and days open (TPEND). WebPTA's for Daughter pregnancy rates (DPR) measure genetic differences between bulls in fertility of their daughters. DPR predicts genetic improvement (or deterioration) in pregnancy rate for future daughters of a bull compared to a bull that is expected to produce no change (PTA DPR = 0).
Pregnancy rate dropped over past decade, CDC says
WebLast year, the April 2024 evaluations showed a larger-than-expected variation in CDCB fertility traits (daughter pregnancy rate {DPR}, heifer conception rate {HCR} and cow conception rate {CCR}). AI bulls in all breeds showed a reduction in their traditional Predicted Transmitting Abilities (PTA), the effect being more accentuated among young WebOct 13, 2024 · Herein, we aimed to clarify the effects of sire predicted transmitting ability (PTA) for daughter pregnancy rate (DPR) on the reproductive performance and milk yield of daughters in Japanese dairy herds. cup display stand
Daughter pregnancy rate evaluations and reliabilities …
WebApr 1, 2024 · Daughter pregnancy rate is a measurement of the hazard of pregnancy after calving (pregnancy risk for 21-d interval cycles after the voluntary waiting period) of a bull's daughters compared with the concurrent population. WebAug 16, 2024 · Daughter pregnancy rate is a measure of female fertility, namely a cow’s ability to begin cycling in a timely manner after calving and to conceive and maintain a pregnancy when inseminated. This trait is measured as days open (DO), but it is converted to 21-day pregnancy rate (i.e., the proportion of non-pregnant cows that become … WebMar 27, 2024 · Daughters of a sire with a +1.0 DPR are expected to conceive four days earlier, on average, than daughters of a sire with a +0.0 DPR. The range in DPR typically runs from approximately -3.0 to +3.0. This equates to a difference of more than three weeks in days open. Recent performance study cup divided by 16