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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela; INIA Las Brujas; INIA Tacuarembó. |
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Fecha : |
21/02/2014 |
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Actualizado : |
18/10/2019 |
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Tipo de producción científica : |
Trabajos en Congresos/Conferencias |
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Autor : |
FERNÁNDEZ, G.; MARTÍNEZ, M.E. |
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Título : |
Efecto de la especie de cultivo y de tecnologías herbicidas en la dinámica de una comunidad de invernales: tecnologías herbicidas |
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Fecha de publicación : |
1995 |
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Fuente / Imprenta : |
In: ASOCIACIÓN LATINOAMERICANA DE MALEZAS. CONGRESO LATINOAMERICANO DE MALEZAS, 12. 21-23 MARZO 1995, MONTEVIDEO (URY). RÍOS, A.; FERNÁNDEZ, G. (EDS.). Conferencias y trabajos. Montevideo: INIA, 1995. |
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Páginas : |
p. 402-407 |
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Serie : |
(INIA Serie Técnica ; 56) |
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Idioma : |
Español |
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Notas : |
Congreso declarado de interés nacional (decreto del Poder Ejecutivo octubre/1994) |
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Thesagro : |
CEBADA; COMPETICION VEGETAL; ESCARDA; FACTORES DE RENDIMIENTO; HERBICIDAS; RENDIMIENTO DE CULTIVOS; TRIGO. |
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Asunto categoría : |
--
F01 Cultivo |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/8399/1/st-56A-1995-p.402-407.pdf
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Marc : |
LEADER 00990naa a2200241 a 4500
001 1012198
005 2019-10-18
008 1995 bl uuuu u00u1 u #d
100 1 $aFERNÁNDEZ, G.
245 $aEfecto de la especie de cultivo y de tecnologías herbicidas en la dinámica de una comunidad de invernales$btecnologías herbicidas
260 $c1995
300 $ap. 402-407
490 $a(INIA Serie Técnica ; 56)
500 $aCongreso declarado de interés nacional (decreto del Poder Ejecutivo octubre/1994)
650 $aCEBADA
650 $aCOMPETICION VEGETAL
650 $aESCARDA
650 $aFACTORES DE RENDIMIENTO
650 $aHERBICIDAS
650 $aRENDIMIENTO DE CULTIVOS
650 $aTRIGO
700 1 $aMARTÍNEZ, M.E.
773 $tIn: ASOCIACIÓN LATINOAMERICANA DE MALEZAS. CONGRESO LATINOAMERICANO DE MALEZAS, 12. 21-23 MARZO 1995, MONTEVIDEO (URY). RÍOS, A.; FERNÁNDEZ, G. (EDS.). Conferencias y trabajos. Montevideo: INIA, 1995.
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Registro original : |
INIA Las Brujas (LB) |
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 | Acceso al texto completo restringido a Biblioteca INIA Tacuarembó. Por información adicional contacte bibliotb@tb.inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha actual : |
14/03/2017 |
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Actualizado : |
13/01/2020 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
VAN LIER, E.; HART, K.W.; VIÑOLES, C.; PAGANONI, B.; BLACHE, D. |
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Afiliación : |
E. VAN LIER, Universidad de la República (UdelaR)/ Facultad de Agronomía; K. W. HART; CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; B. PAGANONI; D. BLACHE. |
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Título : |
Calm Merino ewes have a higher ovulation rate and more multiple pregnancies than nervous ewes. |
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Fecha de publicación : |
2017 |
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Fuente / Imprenta : |
Animal, 2017, v. 11, no. 7, p. 1196-1202. |
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DOI : |
10.1017/S1751731117000106 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 15 June 2016; Accepted 13 December 2016. |
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Contenido : |
In 1990, two selection lines of Merino sheep were established for low and high behavioural reactivity (calm and nervous temperament) at the University of Western Australia. Breeding records consistently showed that calm ewes weaned 10% to 19% more lambs than the nervous ewes. We hypothesise that calm ewes could have a higher ovulation rate than nervous ewes and/or calm ewes could have a lower rate of embryo mortality than nervous ewes. We tested these hypotheses by comparing the ovulation rate and the rate of embryo mortality between the calm and nervous lines before and after synchronisation and artificial insemination. Merino ewes from the temperament selection lines (calm, n = 100; nervous, n = 100) were synchronised (early breeding season) for artificial insemination (day 0) (intravaginal sponges containing fluogestone acetate and eCG immediately after sponge withdrawal). On day-17 and 11 ovarian cyclicity and corpora lutea, and on days 30 and 74 pregnancies and embryos/foetuses were determined by ultrasound. Progesterone, insulin and leptin concentrations were determined in blood plasma samples from days 5, 12 and 17. Ovarian cyclicity before and after oestrus synchronisation did not differ between the lines, but ovulation rate did (day-17: calm 1.63; nervous 1.26; P<0.01; day 11: calm 1.83; nervous 1.57; P<0.05). Ovulation rate on day 11 in nervous ewes was higher than on day-17. Loss of embryos by day 30 was high (calm: 71/150; nervous: 68/130); but nervous ewes had a lower proportion (15/47) of multiple pregnancies compared with calm ewes (30/46; P<0.01). Reproductive loss between days 30 and 74 represented 7.3% of the overall loss. Temperament did not affect concentrations of progesterone, but nervous ewes had higher insulin (32.0 pmol/l ± 1.17 SEM; P = 0.013) and lower leptin (1.18 μg/l ± 0.04 SEM; P = 0.002) concentrations than calm ewes (insulin: 27.8 pmol/l ± 1.17 SEM; leptin: 1.35 μg/l ± 0.04 SEM). The differences in reproductive outcomes between the calm and nervous ewes were mainly due to a higher ovulation rate in calm ewes. We suggest that reproduction in nervous ewes is compromised by factors leading up to ovulation and conception, or the uterine environment during early pregnancy, that reflect differences in energy utilisation. MenosIn 1990, two selection lines of Merino sheep were established for low and high behavioural reactivity (calm and nervous temperament) at the University of Western Australia. Breeding records consistently showed that calm ewes weaned 10% to 19% more lambs than the nervous ewes. We hypothesise that calm ewes could have a higher ovulation rate than nervous ewes and/or calm ewes could have a lower rate of embryo mortality than nervous ewes. We tested these hypotheses by comparing the ovulation rate and the rate of embryo mortality between the calm and nervous lines before and after synchronisation and artificial insemination. Merino ewes from the temperament selection lines (calm, n = 100; nervous, n = 100) were synchronised (early breeding season) for artificial insemination (day 0) (intravaginal sponges containing fluogestone acetate and eCG immediately after sponge withdrawal). On day-17 and 11 ovarian cyclicity and corpora lutea, and on days 30 and 74 pregnancies and embryos/foetuses were determined by ultrasound. Progesterone, insulin and leptin concentrations were determined in blood plasma samples from days 5, 12 and 17. Ovarian cyclicity before and after oestrus synchronisation did not differ between the lines, but ovulation rate did (day-17: calm 1.63; nervous 1.26; P<0.01; day 11: calm 1.83; nervous 1.57; P<0.05). Ovulation rate on day 11 in nervous ewes was higher than on day-17. Loss of embryos by day 30 was high (calm: 71/150; nervous: 68/130); but nervous ewes had a... Presentar Todo |
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Palabras claves : |
EMBRYO; INSULIN; LEPTIN; OVIS ARIES; PROGESTERONE. |
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Thesagro : |
OVINOS. |
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Asunto categoría : |
L01 Ganadería |
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Marc : |
LEADER 03073naa a2200265 a 4500
001 1056829
005 2020-01-13
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1017/S1751731117000106$2DOI
100 1 $aVAN LIER, E.
245 $aCalm Merino ewes have a higher ovulation rate and more multiple pregnancies than nervous ewes.$h[electronic resource]
260 $c2017
500 $aArticle history: Received 15 June 2016; Accepted 13 December 2016.
520 $aIn 1990, two selection lines of Merino sheep were established for low and high behavioural reactivity (calm and nervous temperament) at the University of Western Australia. Breeding records consistently showed that calm ewes weaned 10% to 19% more lambs than the nervous ewes. We hypothesise that calm ewes could have a higher ovulation rate than nervous ewes and/or calm ewes could have a lower rate of embryo mortality than nervous ewes. We tested these hypotheses by comparing the ovulation rate and the rate of embryo mortality between the calm and nervous lines before and after synchronisation and artificial insemination. Merino ewes from the temperament selection lines (calm, n = 100; nervous, n = 100) were synchronised (early breeding season) for artificial insemination (day 0) (intravaginal sponges containing fluogestone acetate and eCG immediately after sponge withdrawal). On day-17 and 11 ovarian cyclicity and corpora lutea, and on days 30 and 74 pregnancies and embryos/foetuses were determined by ultrasound. Progesterone, insulin and leptin concentrations were determined in blood plasma samples from days 5, 12 and 17. Ovarian cyclicity before and after oestrus synchronisation did not differ between the lines, but ovulation rate did (day-17: calm 1.63; nervous 1.26; P<0.01; day 11: calm 1.83; nervous 1.57; P<0.05). Ovulation rate on day 11 in nervous ewes was higher than on day-17. Loss of embryos by day 30 was high (calm: 71/150; nervous: 68/130); but nervous ewes had a lower proportion (15/47) of multiple pregnancies compared with calm ewes (30/46; P<0.01). Reproductive loss between days 30 and 74 represented 7.3% of the overall loss. Temperament did not affect concentrations of progesterone, but nervous ewes had higher insulin (32.0 pmol/l ± 1.17 SEM; P = 0.013) and lower leptin (1.18 μg/l ± 0.04 SEM; P = 0.002) concentrations than calm ewes (insulin: 27.8 pmol/l ± 1.17 SEM; leptin: 1.35 μg/l ± 0.04 SEM). The differences in reproductive outcomes between the calm and nervous ewes were mainly due to a higher ovulation rate in calm ewes. We suggest that reproduction in nervous ewes is compromised by factors leading up to ovulation and conception, or the uterine environment during early pregnancy, that reflect differences in energy utilisation.
650 $aOVINOS
653 $aEMBRYO
653 $aINSULIN
653 $aLEPTIN
653 $aOVIS ARIES
653 $aPROGESTERONE
700 1 $aHART, K.W.
700 1 $aVIÑOLES, C.
700 1 $aPAGANONI, B.
700 1 $aBLACHE, D.
773 $tAnimal, 2017$gv. 11, no. 7, p. 1196-1202.
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