Does preferential pairing occur in Secale cereale × S. montanum tetraploid hybrids?
نویسندگان
چکیده
منابع مشابه
A Cytogenetic Analysis of the Hybrid Secale Cereale L. x Secale Montanum Guss. and Its Progeny.
ITHIN the genus Secale L. hybrids between various perennial forms have all shown regular meiotic chromosome behavior as have hybrids between different annual strains belonging to S. cereale L. In all hybrids between S. cereale and perennial forms, however, a translocation figure has been observed a t metaphase I in the PMC’s. The maximum association is apparently a ring-of-six, but this is seld...
متن کاملThe Ph1 locus from wheat controls meiotic chromosome pairing in autotetraploid rye (Secale cereale L.).
The Ph1 locus on chromosome 5B enforces strictly bivalent pairing in polyploid wheat, but the exact mechanism of its action remains unknown. Pairing restriction involves not only wheat homoeologues and all alien introgressions but also differentiated homologues. In this study we show that chromosome 5B with its Ph1 locus also controls chromosome pairing in autotetraploid rye by apparently restr...
متن کاملIsozymes in Aegilops kotschyi and Ae. biuncialis x Secale cereale hybrids and Ae. kotschyi x S. cereale amphiploids in relation to their parents.
Seven enzymatic systems in F1 Aegilops kotschyi and Ae. biuncialis x Secale cereale hybrids, Aegilops kotschyi x S. cereale amphiploids and their parental species (Ae. kotschyi, Ae. biuncialis and S. cereale) were analysed by starch and polyacrylamide gel electrophoresis. Five of them (phosphoglucose isomerase, glutamic oxalacetic transaminase, esterase, acid phosphatase, and diaphorase) were p...
متن کاملHybrids and amphiploids of Aegilops ovata L. with Secale cereale L.: production, morphology and fertility.
Hybrids (2n = 3x = 21) between Aegilops ovata and Secale cereale were produced via embryo rescue. Most hybrid morphological traits were intremediate between parents, the plants grew vigorously but were completely sterile. The average frequency of chromosome associations at metaphase I was 19.57-20.19 univalents and 0.40-0.86 rod bivalents. The fertility of the hybrids was restored by doubling t...
متن کاملProduction and characterization of amphiploids of Aegilops kotschyi and Ae. biuncialis with Secale cereale, and of backcross hybrids of Ae. biuncialis × S. cereale amphiploids with 2x and 4x S. cereale
Amphiploids (2n = 6x = 42) of Ae. kotschyi and Ae. biuncialis with self-compatible S. cereale were produced from F1 sterile hybrids (2n = 3x = 21) through colchicine treatment and callus tissue regeneration. The amphiploids resembled the F1 plants in overall morphology, but were larger in all respects and self-fertile. The spikelets consisted mostly of 3 well-developed florets. Selfed seeds wer...
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ژورنال
عنوان ژورنال: Heredity
سال: 1984
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1984.38