دانلود مقاله انگلیسی رایگان:نرخ حاملگی به هوش مصنوعی با زمان ثابت در گاوهای گوشتی تحت تأثیر علامت Bos با استفاده از PGF2a با (Bee Synch I) یا بدون (Bee Synch II) GnRH در آغاز پروتکل 5 روزه CO-Synch þ CIDR - 2020
بلافاصله پس از پرداخت دانلود کنید
دانلود مقاله انگلیسی هوش مصنوعی رایگان
  • Pregnancy rates to fixed-time AI in Bos indicus-influenced beef cows using PGF2a with (Bee Synch I) or without (Bee Synch II) GnRH at the onset of the 5-day CO-Synch þ CIDR protocol Pregnancy rates to fixed-time AI in Bos indicus-influenced beef cows using PGF2a with (Bee Synch I) or without (Bee Synch II) GnRH at the onset of the 5-day CO-Synch þ CIDR protocol
    Pregnancy rates to fixed-time AI in Bos indicus-influenced beef cows using PGF2a with (Bee Synch I) or without (Bee Synch II) GnRH at the onset of the 5-day CO-Synch þ CIDR protocol

    سال انتشار:

    2020


    عنوان انگلیسی مقاله:

    Pregnancy rates to fixed-time AI in Bos indicus-influenced beef cows using PGF2a with (Bee Synch I) or without (Bee Synch II) GnRH at the onset of the 5-day CO-Synch þ CIDR protocol


    ترجمه فارسی عنوان مقاله:

    نرخ حاملگی به هوش مصنوعی با زمان ثابت در گاوهای گوشتی تحت تأثیر علامت Bos با استفاده از PGF2a با (Bee Synch I) یا بدون (Bee Synch II) GnRH در آغاز پروتکل 5 روزه CO-Synch þ CIDR


    منبع:

    Sciencedirect - Elsevier - Theriogenology, 142 (2020) 229-235. doi:10.1016/j.theriogenology.2019.09.047


    نویسنده:

    G.L. Williams a, b, *, R.L. Stanko a, c


    چکیده انگلیسی:

    Objectives were to 1) characterize fixed-time AI (FTAI) pregnancy rates using the 5-Day CO-Synch þ CIDR protocol in mature, suckled Bos indicus-influenced beef cows, 2) compare FTAI pregnancy rates in the latter to a modified version (5-Day Bee Synch þ CIDR; Bee Synch I) that included treatment with prostaglandin F2a (PGF2a) at CIDR insertion on Day 0, and 3) test the hypothesis that elimination of both GnRH-1 at the onset of synchronization and the double dose of PGF on Day 5 (Bee Synch II) would not reduce FTAI pregnancy rates compared to Bee Synch I. For Experiment 1-trial 1, Brahman x Hereford (F-1) cows (n ¼ 168) at least 40 d postpartum (PP; r ¼ 40e92 d) at the time of CIDR insertion were administered the 5-Day CO-Synch þ CIDR protocol with FTAI at 72 h after CIDR removal. Pregnancy rates to FTAI averaged 34.9 ± 1.9%. In Experiment 1-trial 2, fall- and spring-breeding Brahman x Hereford (F-1) beef cows (n ¼ 269) were stratified by days PP and assigned randomly to receive either the 5-Day COSynch þ CIDR (n ¼ 136) or Bee Synch I (n ¼ 133) protocol, with FTAI at 66 h after CIDR removal. Pregnancy rate to FTAI was greater (P < 0.05) in Bee Synch I (52.6 ± 0.9%) than in the 5-Day COSynch þ CIDR procedure (40.4 ± 5.7%). For Experiment 2, 422 mature Braford, Brangus, Nelore x Brahman, and Brahman crossbred cows (Bos indicus proportion unknown) at 4 locations were treated with Bee Synch I, with FTAI at 66 h. Overall FTAI pregnancy rate averaged 51.7 ± 2.1%. Finally, from 2013 through spring 2018, we used a switchback design using fall- and spring-breeding herds to compare Bee Synch I (402 observations) to Bee Synch II (393 observations). Overall frequency of detected estrus at 66 h using ESTROTECT™ breeding indicator patches was 57.2 ± 2.4%, conception rates of those detected in estrus was 64.4 ± 3.5%, and FTAI pregnancy rates averaged 52.3 ± 2.4%, none of which differed between treatments. Moreover, pregnancy rates to FTAI in both treatments did not differ in cows synchronized between 40 and 80 d PP but increased after 80 d PP (P < 0.05). Bee Synch II, which eliminates GnRH-1 and the double dose of PGF2a on Day 5, results in FTAI pregnancy rates essentially identical to Bee Synch I but reduces synchronization costs and avoids the need for off-label (double dose PGF2a) drug use.
    Keywords: 5-Day CO-Synch þ CIDR | Prostaglandin F2a | GnRH | Bos indicus | Bee synch


    سطح: متوسط
    تعداد صفحات فایل pdf انگلیسی: 7
    حجم فایل: 396 کیلوبایت

    قیمت: رایگان


    توضیحات اضافی:




اگر این مقاله را پسندیدید آن را در شبکه های اجتماعی به اشتراک بگذارید (برای به اشتراک گذاری بر روی ایکن های زیر کلیک کنید)

تعداد نظرات : 0

الزامی
الزامی
الزامی
rss مقالات ترجمه شده rss مقالات انگلیسی rss کتاب های انگلیسی rss مقالات آموزشی
logo-samandehi