›› 2017, Vol. 44 ›› Issue (2): 505-513.doi: 10.16431/j.cnki.1671-7236.2017.02.029

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Identification of Differentially Expressed Genes in Medium-sized Ovarian Follicles between Meishan and Duroc Sows

ZHAO Zhi-chao1,2, HUANG Tao1, YANG Fei1, LIU Li-juan1, SUN Jing-li1, WANG Xiao-yan3, SONG Cheng-yi3, LI Da-quan1   

  1. 1. College of Animal Science and Technology, Shihezi University, Shihezi 832003, China;
    2. School of Life Science and Food Engineering, Hebei University of Engineering, Handan 056021, China;
    3. College of Animal Science and Technology, Yangzhou University, Yangzhou 225000, China
  • Received:2016-08-18 Online:2017-02-20 Published:2017-02-25

Abstract:

To reveal the molecular mechanism involved in different number of ovulation between hyperprolific and ordinary sows, forward and reverse subtracted cDNA libraries were constructed to screen differentially expressed genes in medium ovarian follicles at 4th day during follicular phase of estrous cycle between Meishan and Duroc sows. The differentially expressed genes selected were demonstrated by Real-time PCR and cluster analysis was performed through DAVID. The results showed that a total of 148 and 75 non-redundant ESTs were isolated from the SSH library of Meishan and Duroc sows M2 follicles, including 125 and 60 known genes, respectively. The results of Real-time PCR were consistent with the screening results. GO analysis indicated that these genes were involved in regulation of metabolic process, cell cycle, biosynthetic process, intracellular transport, steroid hormone receptor and stimulus. KEGG pathway analysis defined 6 genes involved in TGF-beta signaling pathway, 5 genes in oocyte meiosis pathway, 7 genes in steroid hormone receptor signaling pathway. Genes controlling TGF-beta signaling pathway were considered to play an important role in regulating follicle development. The research would be helpful for further studying the follicular development and the genetic mechanism on reproductive traits.

Key words: differentially expressed genes; ovarian follicle; Meishan sow; Duroc sow

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