کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8404957 | 1544737 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sex determination in horses-Current status and future perspectives
ترجمه فارسی عنوان
تعیین جنسیت در اسب - وضعیت فعلی و چشم انداز آینده
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
اسب، تعیین جنسیت، جنین، جنین، محیط،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
In the equine species, sex determination of the conceptus is of growing interest for the breeding industry. In horses, the sex ratio of the offspring depends on changes in body condition of the mother at conception and under natural conditions may thus markedly deviate from an expected 1:1 ratio. Insemination with sex-sorted spermatozoa allows a pronounced shift of the sex ratio but at present pregnancy rates are low and vary considerably under field conditions. In equine embryo transfer programmes, sex determination in embryos before transfer via genetic methods is a promising approach with high reliability. In ongoing pregnancies, fetal sex can be determined in utero by transrectal or transabdominal ultrasound between days 57 and 220 after ovulation, but experience is required to achieve satisfying accuracy. Recently, genetic sexing via identification of circulating cell-free fetal DNA in the maternal circulation has been successfully performed in the last three months of pregnancy. Development of this technique may also allow fetal sex determination at earlier stages of pregnancy. Further research is required to allow for techniques that enable sex determination in equine embryos as well as in ongoing pregnancies under field conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Reproduction Science - Volume 146, Issues 1â2, April 2014, Pages 34-41
Journal: Animal Reproduction Science - Volume 146, Issues 1â2, April 2014, Pages 34-41
نویسندگان
Christine Aurich, Jana Schneider,