Effect of sperm concentration in an ejaculate on morphometric traits of spermatozoa in Duroc boars

Kondracki, Stanisław; Wysokińska, Anna; Iwanina, Maria; Banaszewska, Dorota; Sitarz, D.

doi:10.2478/v10181-011-0005-z

Cited by 21 publications

(20 citation statements)

References 31 publications

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“…Ejaculates of Duroc boars usually produce fewer insemination doses than ejaculates of other breeds. This is connected with the predisposition of Duroc boars to produce ejaculates with low volumes and high sperm concentration, as confirmed by results of numerous studies (Leidinger et al 1998, Park & Yi 2002, Kondracki 2003, Smital et al 2004, Kondracki et al 2011. Therefore, it is more advantageous to use two-breed reproduction males derived from the Duroc breed, rather than pure-bred Duroc boars.…”

Section: Discussionmentioning

confidence: 86%

Assessment of the effect of heterosis on semen parameters of two-breed crosses of Duroc, Hampshire and Pietrain boars

Wysokińska¹,

Kondracki

2013

Arch. Anim. Breed.

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The study was performed on 4 609 ejaculates obtained from 32 boars, including 14 purebred and 18 two-breed crosses. The ejaculates were collected manually every 4-5 days. The study involved ejaculates collected from each boar from the first day of its insemination use until the day of semen depletion. Each ejaculate was assessed for the following physical parameters: ejaculate volume, sperm concentration, percentage of spermatozoa with correct motility, total sperm count per ejaculate and number of insemination doses obtained from one ejaculate. The effect of heterosis was calculated on the physical parameters of the boar crosses ejaculates in relation to the mean value of a given parameter for the parent breeds. Positive and well pronounced heterosis effects were identified in the majority of the physical ejaculate parameters of the cross boars for all the cross-breeding variants. A negative effect of heterosis was only identified in the ejaculate sperm concentration of the Hampshire × Pietrain crosses. The highest ejaculatory efficiency was identified in the hybrids produced on the basis of the Hampshire breed. These breeders were also found to feature significant heterosis effects on ejaculate volume, total ejaculate sperm count and number of insemination doses prepared from one ejaculate.

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Section: Discussionmentioning

confidence: 86%

Assessment of the effect of heterosis on semen parameters of two-breed crosses of Duroc, Hampshire and Pietrain boars

Wysokińska¹,

Kondracki

2013

Arch. Anim. Breed.

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“…This is not only significant in the context of insemination dose production. It has been found out that ejaculate sperm concentration is connected with morphological traits of spermatozoa (Kondracki et al, 2011(Kondracki et al, , 2013aRijsselaere et al, 2004) and this in turn affects the fertilization potential of the spermatozoa (Chenoweth, 2005;de Paz et al, 2011;Hirai et al, 2001;Ostermeier et al, 2001). Effects of high collection frequency on the physical characteristics of ejaculates have also been observed by Pruneda et al (2005).…”

Section: MMmentioning

confidence: 99%

Physical characteristics of ejaculates produced by insemination boars depending on the interval between successive ejaculate collections

Bajena¹,

Kondracki²,

Iwanina³

et al. 2016

JCEA

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The ejaculate characteristics of Polish Landrace boars showed a significant correlation with the intervals between the successive ejaculate collections. The effect of insemination use intensity was however varied. Rising frequency of ejaculate collection led to a systematic and fairly even fall in ejaculate volume. Ejaculate sperm concentration remained at a relatively high level when ejaculates were collected with a frequency of 7 to 3 days but further shortening of the interval between the successive collections led to a drastic decrease in sperm concentration. An increase in ejaculate collection frequency to every four and fewer days resulted in a significant decrease in the number of spermatozoa present in the produced ejaculates and a concomitant decrease in the number of insemination doses prepared from these ejaculates, with an escalation of such changes. się na relatywnie wysokim poziomie przy pobieraniu ejakulatów z częstotliwością co 3-7 dni, ale dalsze skracanie czasu między kolejnymi pobraniami skutkuje drastycznym zmniejszaniem koncentracji plemników. Zwiększanie częstotliwości pobierania ejakulatu do co 4 i mniejszej liczby dni skutkuje istotnym zmniejszaniem liczby plemników w wydalanych ejakulatach i adekwatnym zmniejszaniem liczby porcji inseminacyjnych wytwarzanych z tych ejakulatów, przy czym następuje eskalacja tych zmian.Słowa kluczowe: częstotliwość ejakulacji, jakość ejakulatu, knur Detailed abstract Badania przeprowadzono na materiale 126 ejakulatów, pobranych od 6 knurów rasy polskiej białej zwisłouchej (po 21 ejakulatów od każdego knura). Ejakulaty pobierano zachowując stałe i regularne odstępy między kolejnymi pobraniami. Od każdego knura pobrano po 3 ejakulaty w odstępach 7-dniowych oraz po 3 ejakulaty w odstępach 6, 5, 4, 3, 2, i 1-dniowych. Każdy ejakulat poddano ocenie ustalając następujące cechy fizyczne: objętość ejakulatu, koncentrację plemników, odsetek plemników o ruchu postępowym, ogólną liczbę plemników w ejakulacie i liczbę dawek inseminacyjnych uzyskanych z jednego ejakulatu. Zebrane dane pogrupowano według kryterium odstępu między kolejnymi pobraniami ejakulatu.Wykazano, że cechy fizyczne ejakulatu zależą od odstępu czasu między kolejnymi pobraniami ejakulatu. Wpływ intensywności inseminacyjnego użytkowania jest jednak zróżnicowany. W przypadku objętości ejakulatu zwiększanie częstotliwości pobierania ejakulatów skutkuje systematycznym i w miarę równomiernym zmniejszaniem objętości ejakulatów. Koncentracja plemników w ejakulacie utrzymuje się na relatywnie wysokim poziomie (powyżej 360 x 10 3. mm -3) przy pobieraniu ejakulatów z częstotliwością co 3-7 dni, ale dalsze skracanie czasu między kolejnymi pobraniami skutkuje drastycznym zmniejszaniem koncentracji plemników w ejakulacie. Ejakulaty o bardzo dużej liczbie plemników (powyżej 90 mld) pozyskuje się przy częstotliwości ejakulacji mniejszej niż co 4 dni. Zwiększanie częstotliwości pobierania ejakulatu do 4 i mniejszej liczby dni skutkuje istotnym zmniejszaniem liczby plemników w wydalanych ejakulatach i adekwat...

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“…It is conditioned both by genetic and environmental factors which affect the quality and quantity of generated semen (Holt et al, 1997). Some of their studies have revealed variability in morphometric sperm parameters in relation to sperm concentration in ejaculates of dogs (Rijsselaere et al, 2004), stallions (Davis et al, 1993) and boars (banaszewska et al, , Kondracki et al, 2011. only morphologically wellformed spermatozoa are capable of this.…”

Section: Introductionmentioning

confidence: 99%

Correlation of frequency of spermatozoa morphological alterations with sperm concentration in ejaculates of Polish Landrace boars

Kondracki¹,

Banaszewska²,

Bajena³

et al. 2013

ACTA VET-BEOGRAD

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The experiments were performed on 448 ejaculates obtained from 41 Polish Landrace boars. Ejaculates collected from each boar at one-month intervals for approximately 10 months were analysed. Sperm morphometric measurements were taken from each boar and assessment of semen morphology was done on the basis of examination under a microscope of preparations made from fresh ejaculates. The ejaculates were classified based on the criterion of sperm concentration and divided into three groups. An attempt was made in the present study to assess the correlation of ejaculate parameters, morphological sperm alteration incidence and morphometric sperm parameters with the sperm concentration in ejaculates of Polish Landrace boars. It should be stated that morphometric traits of spermatozoa are related to sperm concentration. The spermatozoa in concentrated ejaculates had smaller heads than the spermatozoa in the ejaculates with lower sperm concentrations. This can mean that the high fertility of males that produce highly concentrated semen does not only result from a high sperm concentration, but also from the fact that the spermatozoa in such ejaculates have smaller heads. The highest frequency of morphologically well-formed spermatozoa was identified in ejaculates with the sperm concentration ranging from 400 to 500 thousand/mm 3 .

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Effect of sperm concentration in an ejaculate on morphometric traits of spermatozoa in Duroc boars

Cited by 21 publications

References 31 publications

Assessment of the effect of heterosis on semen parameters of two-breed crosses of Duroc, Hampshire and Pietrain boars

Assessment of the effect of heterosis on semen parameters of two-breed crosses of Duroc, Hampshire and Pietrain boars

Physical characteristics of ejaculates produced by insemination boars depending on the interval between successive ejaculate collections

Correlation of frequency of spermatozoa morphological alterations with sperm concentration in ejaculates of Polish Landrace boars

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