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- W2186142493 abstract "Body length and weight and the developmental stage of sex cells were determined in 1.5- and 3-year-old specimens of the F1 generation of reciprocal hybrids of roach Rutilus rutilus and ide Leuciscus idus. Body length and weight and the developmental stage of sex cell varied in reciprocal hybrids of roach and ide. The hybrids obtained from crossing R. rutilus females with L. idus males (R. rutilus L. idus) were larger than those obtained from crossing L. idus females with R. rutilus males (L. idus R. rutilus) (P 0.05) and a greater body length and weight than R. rutilus (P < 0.001). The hybrids of L. idus R. rutilus were smaller than L. idus and larger than R. rutilus (P < 0.001). Two-thirds of the studied L. idus x R. rutilus hybrid females were sexually mature at age 3, and only one R. rutilus L. idus hybrid female exhibited signs of cytological maturation. In the control samples, roach females reached sexual maturity, while ide females were immature. The testes of 3-year-old R. rutilus x L. idus hybrid males contained spermatogonia and spermatocytes, while those of L. idus R. rutilus hybrid males most often contained spermatocytes. The ovaries of female reciprocal hybrids of R. rutilus and L. idus contained not only developing oocytes, but also sex cells which stopped developing at an early stage of gametogenesis. These constituted approximately 50-60% of the area of ovary sections in 13% of the studied females, while in other females they were observed singly. The results obtained indicate that rapid somatic growth exhibited by L. idus is inherited by hybrids to a greater extent through L. idus males than through females. The differences in achieving sexual maturity exhibited by the females of reciprocal hybrids of R. rutilus and L. idus suggest that male genomes may have an important impact on this process." @default.
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- W2186142493 date "2003-01-01" @default.
- W2186142493 modified "2023-09-27" @default.
- W2186142493 title "VARIED SOMATIC GROWTH AND SEX CELL DEVELOPMENT IN RECIPROCAL HYBRIDS OF ROACH RUTILUS RUTILUS (L.) AND IDE LEUCISCUS IDUS (L.)" @default.
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