Selection for Ovulation Rate in Swine: Population, Procedures and Ovulation Response

Zimmerman, David; Cunningham, P. J.

doi:10.2527/jas1975.40161x

Cited by 56 publications

(37 citation statements)

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“…The heritability estimate of .41 +-.41 for number of corpora lutea agrees closely with previous estimates (Zimmerman and Cunningham, 1975;Young et al, 1977). The heritability estimate for number of embryos was negative, but the estimate for percentage live embryos of corpora lutea was .57 + .41.…”

Section: Resultssupporting

confidence: 88%

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The Relationships between Plasma Progesterone and LH and the Numbers of Corpora Lutea and Embryos in Purebred and Crossbred Gilts

Wettemann

Johnson

Omtvedt

1980

Journal of Animal Science

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SummaryRelationships between plasma progesterone and luteinizing hormone (LH) and the numbers of corpora lutea and embryos were determined in 133 8-month-old purebred Duroc, Hampshire and Yorkshire gilts and two-breed crosses among the three breeds. The numbers of corpora lutea and normal embryos were determined at slaughteronday 30.8 +-.2 of pregnancy, and progesterone and LH were quantified in plasma obtained the previous day. Progesterone concentrations in plasma were influenced by sire (P<.10), breed of dam (P<.05) and breed of sire • breed of dam (P<.05). Hampshire gilts had higher concentrations of progesterone in plasma than did Durocs (P<.05) and Yorkshires (P<.01). None of the effects in the model was significant for LH. Plasma progesterone and LH had heritability estimates of .48 + .41 and .29 + .40, respectively.Most genetic and phenotypic correlations of plasma progesterone and LH with other traits were small. These data indicate that progesterone concentrations in plasma at 30 days of pregnancy are not a satisfactory predictor of the numbers of corpora lutea and embryos. The differences in plasma progesterone between breeds illustrate the need to consider the breed of gilts when selecting animals for the I Journal Article 3590 of the Agr. Exp. Sta., Oklahoma State Univ., Stillwater. This research was conducted in cooperation with the USDA, SEA-AR. 2We thank Dr. G. D. Niswender (Colorado State University) for the progesterone-63-BSA and porcine LH antibodies, Dr. L. E. Reichert Jr. (Emory University) for the supply of porcine LH for iodination and the NIAMD for the supply of LH standard (NIH-LH-Sjs).3 Anita. Sci. Dept., Oklahoma State Univ., Stillwater 74078.4Present address: Dept. of Anlrn. Sci., Univ. of Nebraska, Lincoln 68500. study of luteal function or physiological factors that may influence progesterone concentrations in plasma.

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Section: Resultssupporting

confidence: 88%

“…Ovulation rate can be improved through selection (Zimmerman and Cunningham, 1975), but the increase does not have a major effect on litter size (England et al, 1977). Young et al (1976) breeds in ovulation rate and embryonic survival, but differences in plasma progesterone and luteinizing hormone (LH) have not been documented.…”

Section: Introductionmentioning

confidence: 99%

The Relationships between Plasma Progesterone and LH and the Numbers of Corpora Lutea and Embryos in Purebred and Crossbred Gilts

Wettemann

Johnson

Omtvedt

1980

Journal of Animal Science

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“…The first experiments of selection for ovulation rate were proposed in mice by and and in pigs by Zimmerman and Cunningham (1975). Selection for ovulation rate was proposed as an indirect way of increasing litter size, assuming that both traits were correlated and that the heritability of ovulation rate was higher than that of litter size.…”

Section: Selection For Ovulation Ratementioning

confidence: 99%

“…Ovulation rate is correlated with litter size and it has a higher heritability (see review in . For these reasons, selection for ovulation rate has been proposed to indirectly increase litter size (Zimmerman and Cunningham, 1975). There are several selection experiments for ovulation rate in pigs and mice , but, to our knowledge no selection for ovulation rate has hitherto been performed in rabbits.…”

Section: Introductionmentioning

confidence: 99%

“…Selection for ovulation rate has been proposed as an indirect way of increasing litter size (Zimmerman and Cunningham, 1975); ovulation rate is the upper limit of litter size and it has a higher heritability. Laborda et al (2010) have shown that selection for ovulation rate has been successful in rabbits, but there has been no correlated response in litter size.…”

Section: Introductionmentioning

confidence: 99%

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Selection for ovulation rate in rabbits

Vidal¹

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ACKNOWLEDGEMENTSDespués de 5 años de trabajo, "Selection for ovulation rate in rabbits" ha salido a la luz. Durante este tiempo he disfrutado de buenos momentos, de momentos duros, y de momentos inolvidables. Me gustaría agradecer a todas las personas que de algún modo han colaborado en mi trabajo. A todas ellas, gracias! A mi familia: mis Padres, por ser mi guía y mi impulso para conseguir nuevos retos; por vuestro apoyo incondicional y vuestro cariño, porque gracias a vosotros estoy hoy aquí. A mi Teta, por enseñarme siempre con tu ejemplo, y por prestarme siempre tu ayuda. A BebeZoe, mi regalo sorpresa de las Navidades de 2009, por ser el mejor regalo que me podían hacer. A Ian, por contribuir a mi regalo. No puedo dejar de mencionar en estos agradecimientos a Pico (mi galguito fiel que me hace reír) porque si lo hiciera, no sería yo.A Vic, por tu amor y tu comprensión; por compartir tus ilusiones conmigo; por saber sacarme una sonrisa siempre; por el día en que salvaste todos mis apuntes del suicidio. Además, por haber dedicado parte de nuestro tiempo de pajareo a esta tesis y por ayudarme con el formato de la tesis.A Monfragüe, mi pequeño paraíso. Gracias por llevarnos, Johnny y Edu, y gracias por esas semanas inolvidables.A mis 101 Dálmatas de Veterinaria, que no los puedo nombrar a todos, porque son 101;-) Amigos junto a los que he pasado tantos buenos momentos y que siempre han estado cerca de mí. Ánimo, Eva y Alo, que ya os queda poco a vosotras también! A mis amigas del cole: Mauri, Bea, Elvi, Salo y Dra. Mache, por una amistad que nos ha visto crecer ¡27 años juntas! A Deivid, Rosa, Bea, Ila, por empezar nuestra amistad en el grupo de comidas. En especial a: Rosa, por apadrinarme a mi llegada al ICTA, y por echarme siempre una mano. Deivid, por estar siempre pendiente, por tus incansables intentos de llevarnos a bucear, por esas cervezas que te debo... Bea, por tu apoyo de hermana pequeña, porque nos hemos desarrollado juntas en el camino del doctorado… y por esa futura celebración de tesis juntas! A los pequeños acuicultores: Mamen, Fer, Pablito, Rosa, Paulo; y a las supernenas del 5º: Mara, Estrella y Carmen. Por todas las risas que nos hemos echado juntos, por el UPV open de padel mixto 2011 y por todas las actividades extraescolares de estos años, de las cuales me he pelado algunas muy a mi pesar, pero espero poder recuperarlas! En especial a Lobster, por nuestro futuro juntas en Teclas! A Vicen, por endulzarnos los días... A Noe, Javi R. y Fede, compañeros y amigos. Cuánto me he reído con vosotros: Noe, una persona alegre y de gran corazón. Javi… qué sería del mundo sin tu toque de humor! Fede, una persona entregada y responsable en su trabajo; gracias por haberte encargado de nuestr@s conej@s, y por esas mañanas de los lunes escuchando "No somos nadie".A todos mis compañeros de la 4ª planta, en especial a Cris, Vero y Mohamed, por compartir nuestras alegrías, nuestros problemas y nuestras dudas. A otras personas con las que compartí vivencias en la 4ª planta y fuera de ella: imponentes Marcia y ...

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Reproduction and Lactation

Maner

Harris

1991

Pork Production Systems

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Selection for Ovulation Rate in Swine: Population, Procedures and Ovulation Response

Cited by 56 publications

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The Relationships between Plasma Progesterone and LH and the Numbers of Corpora Lutea and Embryos in Purebred and Crossbred Gilts

The Relationships between Plasma Progesterone and LH and the Numbers of Corpora Lutea and Embryos in Purebred and Crossbred Gilts

Selection for ovulation rate in rabbits

Reproduction and Lactation

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