Abstract:
:Using megagametophyte (maternal haploid) and embryo (diploid) tissues of incense-cedar seeds, the expression of one of three malate dehydrogenase (MDH) loci was found to be influenced by a second, unlinked, modifier locus. Whereas alleles of the affected structural locus are codominant, the modifier alleles show dominance. The action of the modifier, limited to 1 of 28 structural loci examined, results in a shift of electrophoretic mobility detectable in conventional starch gels. Both the structural and the modifier MDH loci are polymorphic in all populations surveyed. Studies of genetic variation in natural populations made without rigorous genetic analysis may not detect such modification. By misinterpreting the genetic basis of enzyme phenotypes, such undetected modification can result in overestimates of genetic diversity in natural populations and can cause an apparent excess of homozygotes relative to expectations. These effects on allele and genotype frequency estimates are dependent on the levels of polymorphism at both the structural and the modifier loci. Using procedures common to many surveys of electrophoretic variation, the frequency of a recessive modifier allele could be as high as 0.3 before being detected.
journal_name
Biochem Genetjournal_title
Biochemical geneticsauthors
Harry DEdoi
10.1007/BF00484435subject
Has Abstractpub_date
1983-06-01 00:00:00pages
417-34issue
5-6eissn
0006-2928issn
1573-4927journal_volume
21pub_type
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journal_title:Biochemical genetics
pub_type: 杂志文章
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journal_title:Biochemical genetics
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00484739
更新日期:1978-08-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00499484
更新日期:1984-10-01 00:00:00
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pub_type: 杂志文章
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更新日期:1982-08-01 00:00:00
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pub_type: 杂志文章
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更新日期:2012-08-01 00:00:00
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pub_type: 杂志文章
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更新日期:1991-12-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2013-02-01 00:00:00
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更新日期:2002-08-01 00:00:00
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pub_type: 杂志文章
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更新日期:2017-06-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00485835
更新日期:1976-08-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/s10528-006-9035-0
更新日期:2006-10-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00499474
更新日期:1984-10-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1023/a:1015841424598
更新日期:2002-06-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00484473
更新日期:1979-02-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2018-06-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
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更新日期:1980-08-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/s10528-016-9752-y
更新日期:2016-10-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00488466
更新日期:1983-12-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00485784
更新日期:1975-08-01 00:00:00
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pub_type: 杂志文章
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更新日期:2008-12-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00484413
更新日期:1975-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1007/s10528-006-9062-x
更新日期:2007-02-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF02399709
更新日期:1992-04-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/s10528-009-9229-3
更新日期:2009-04-01 00:00:00
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journal_title:Biochemical genetics
pub_type: 杂志文章
doi:10.1007/BF00484590
更新日期:1980-08-01 00:00:00