4. Discussions
Only exon 6 and its flanking region of goat POU1F1
locus showed polymorphic patterns in nine populations
by the method of PCR-SSCP. Then 17 DNA
amplification fragments including the sixth exon of
the POU1F1 locus were sequenced (GenBank Accession
Number DQ826397–DQ826413). The comparisons
between nucleotide sequences of AJ549207 (sheep
POU1F1 gene) and DQ826397–DQ826413 showed four
mutations. Two mutations (T-to-G and T-to-C) were
found in the sixth exon region, and other two mutations
(T-to-C and A-to-G) were in the 3 flanking region. In the
sixth exon, the T-to-G mutation in the 60th nucleotide
of this exon identified a silent allele at POU1F1 locus:
TCT(Ser)-TCG(Ser) at position 241 of the mature protein
(291 aa). Surprisingly, one T-to-C mutation in the
174th nucleotide of this exon also identified a silent allele
at POU1F1 locus: AGT(Ser)-AGC(Ser) at position 279
of the mature protein. Interestingly, we firstly found that
the T-to-C mutation could be detected by AluI endonuclease.
As this mutation was never reported, we named
the allele characterized by the presence of T as POU1F1-
T, while called the allele characterized by the presence
of C for POU1F1-C.
The T-to-C mutation (AGTT-to-AGCT) of the sixth
exon added an AluI endonuclease restriction site
(AGCT). Therefore, the amplified DNA fragment with
this endonuclease digestion showed two fragments (340
and 110 bp) for POU1F1-T allele and three fragments
(216, 124 and 110 bp) for POU1F1-C allele. Frequencies
of POU1F1-C allele in analyzed populations varied
from 0.000 to 0.523.
Cattle, sheep and goat POU1F1 gene had located in
1q21–22 of chromosomes (Woollard et al., 2000). Moreover,
both significant associations of bovine and swine
POU1F1 gene mutations with production traits and QTL
detection revealed that the region surrounding POU1F1,
4. Discussions
Only exon 6 and its flanking region of goat POU1F1
locus showed polymorphic patterns in nine populations
by the method of PCR-SSCP. Then 17 DNA
amplification fragments including the sixth exon of
the POU1F1 locus were sequenced (GenBank Accession
Number DQ826397–DQ826413). The comparisons
between nucleotide sequences of AJ549207 (sheep
POU1F1 gene) and DQ826397–DQ826413 showed four
mutations. Two mutations (T-to-G and T-to-C) were
found in the sixth exon region, and other two mutations
(T-to-C and A-to-G) were in the 3 flanking region. In the
sixth exon, the T-to-G mutation in the 60th nucleotide
of this exon identified a silent allele at POU1F1 locus:
TCT(Ser)-TCG(Ser) at position 241 of the mature protein
(291 aa). Surprisingly, one T-to-C mutation in the
174th nucleotide of this exon also identified a silent allele
at POU1F1 locus: AGT(Ser)-AGC(Ser) at position 279
of the mature protein. Interestingly, we firstly found that
the T-to-C mutation could be detected by AluI endonuclease.
As this mutation was never reported, we named
the allele characterized by the presence of T as POU1F1-
T, while called the allele characterized by the presence
of C for POU1F1-C.
The T-to-C mutation (AGTT-to-AGCT) of the sixth
exon added an AluI endonuclease restriction site
(AGCT). Therefore, the amplified DNA fragment with
this endonuclease digestion showed two fragments (340
and 110 bp) for POU1F1-T allele and three fragments
(216, 124 and 110 bp) for POU1F1-C allele. Frequencies
of POU1F1-C allele in analyzed populations varied
from 0.000 to 0.523.
Cattle, sheep and goat POU1F1 gene had located in
1q21–22 of chromosomes (Woollard et al., 2000). Moreover,
both significant associations of bovine and swine
POU1F1 gene mutations with production traits and QTL
detection revealed that the region surrounding POU1F1,
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