Mammalian Genome

, Volume 22, Issue 11–12, pp 648–660 | Cite as

Genetic dissection of testis weight in mice: quantitative trait locus analysis using F2 intercrosses between strains with extreme testis weight, and association study using Y-consomic strains

  • Jun-ichi SutoEmail author


In the present study, dissection of genetic bases of testis weight in mice was performed. Autosomes and the X chromosome were searched using traditional quantitative trait locus (QTL) scans, and the Y chromosome was searched by association studies of Y-consomic strains. QTL analysis was performed in ♀DDD × ♂CBA F2 mice; the inbred mouse DDD has the heaviest testes, whereas the inbred mouse CBA has the lightest testes. Two significant testis weight QTLs were identified on chromosomes 1 and X. A DDD allele was associated with increased and decreased testis weight at the locus on chromosomes 1 and X, respectively. In the reciprocal cross ♀CBA × ♂DDD F2 mice, QTL on chromosome 1, and not on chromosome X, had a significant effect on testis weight. The DDD allele at the X-linked locus could not sustain testis weight in combination with the Y chromosome of the CBA strain. The Y chromosome per se had a significant effect on testis weight, i.e., DH-Chr YDDD had significantly heavier testes than DH-Chr YCBA. On the basis of the results of Y-chromosome-wide association studies using 17 Y-consomic strains, variations in Uty, Usp9y, and Sry were significantly associated with testis weight. Thus, testis weight is a complex quantitative phenotype controlled by multiple genes on autosomes and sex chromosomes and their interactions.


Quantitative Trait Locus Quantitative Trait Locus Analysis Testis Weight Significant Quantitative Trait Locus Spleen Weight 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by Grants-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (Nos. 15500305 and 19500373).


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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.National Institute of Agrobiological SciencesTsukubaJapan

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