Genomanalytische Untersuchungen bei Triticum � Agropyrum intermedium unter Ber�cksichtigung von Secale cereale � A. intermedium

Gaul, H.

doi:10.1007/bf00308299

Cited by 10 publications

(9 citation statements)

References 83 publications

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“…Therefore, these two genetic systems, both promoting pairing of homoeologous chromosomes, are likely to be unrelated. However, there is a strong similarity between the variability in pairing among the wheat x rye hybrids and that described by Gaul (1953Gaul ( , 1958 for wheat x Agropyron hybrids and by Chistyakova (1972) for wheat-Agropyron polyhaploids. In the pentaploid hybrids, T .…”

Section: Chiasma Frequency Per Cellsupporting

confidence: 61%

“…In the pentaploid hybrids, T . dururn x A. f'ntermedi~m, the mean number of pairs per cell varied from 4.2 to 8.1 and in the hexaploid hybrids, T. aestivurn x A. intermedium, the mean number of pairs per cell ranged from 2.8 to 11.2 (Gaul, 1953). As in wheat x rye hybrids, there was continuous variation within the entire range, without apparent classes.…”

Section: Chiasma Frequency Per Cellmentioning

confidence: 93%

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Effect of Rye on Homoeologous Chromosome Pairing in Wheat × Rye Hybrids

Dvořák¹

1977

Can. J. Genet. Cytol.

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The number of chiasmata per cell at metaphase I was scored in eight haploid plants of Triticum aestivm L. emend. TheHl. cv. 'Chinese Spring' and 100 hybrid plants of Chinese Spring x Secale cereale L. Mean chiasma frequency per cell ranged from 0.00 to 3.59 in the hybrids and from 0.17 to 0.35 in the haploids. Since the same wheat genotype was present in both the haploids and hybrids, it is concluded that some of the rye genotypes promoted homoeologous chromosome pairing. The absence of distinct segregation classes among the hybrids suggests that these genes constitute a polygenic system. On a determink le nsmbre Be ehiasmas par cellule la mktaphase I de huit plants haplo7des de Triticum aestivum L. emend. Thell. cv. 'Chinese Spring' et de 100 plants de Chinese Spring X Secale cereale E. Le taux moyen de chiasma pw cellule variait de 0.80 5 3.59 chez les hybrides et 0.17 B 8.35 chez les hapiloides. Etant donne que le m6me genotype de blC etait present chez les haplo'ides et chez les hybrides, on en conclut que certains genotypes du seigle ont favorid l'appahiement chromosomique horntiiologue. L'absence de classes de segrbgation distinctes chez les hybrides donne B penser que ces gknes constituent un systkrne polygknique. [Traduit par le journal]

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Section: Chiasma Frequency Per Cellsupporting

confidence: 61%

Section: Chiasma Frequency Per Cellmentioning

confidence: 93%

Effect of Rye on Homoeologous Chromosome Pairing in Wheat × Rye Hybrids

Dvořák¹

1977

Can. J. Genet. Cytol.

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“…STEBBINS and PUN (1953) recorded I M associaation for the chromosomes of two parents separately (since rye chromosomes are larger in size such a distinction was possible) and they found that only in two out of 50 PMC's there was a rod bivalent formed between the chromosomes of Sec ale and Agropyron, whereas mean figures for total number of paired chromosomes per cell and the number involved in multivalent associations were 15.83 (range 15-21) and 3.24 (range 0-9) respectively. Data reported by GAUL (1953GAUL ( , 1954 also show that homogenetic association (intragenomic in view of complete non-homology between the genoms of Sec ale and Agropyron) was frequent within the Agropyron intermedium complement. He found on an average 6.1 bivalents, 1.3 trivalents and 0.02 quadrivalents per cell whereas using his following formula for calculating the potential number per cell of chromosomes paired (P),…”

Section: With Agropyronmentioning

confidence: 58%

“…A number of papers reported successful hybridization between Secale cereale (mother parent) and Agropyron intermedium (pollen parent) (VERUSHKINE 1936;cited after SMITH 1942;LJUBIMOVA, 1937;SMITH, 1942;STEBBINS and PUN, 1953;GAUL, 1953), or A. cristatum (KRASN}UK, 1935, 1946AASE, 1935;SMITH, 1942). Other species of Agropyron such as repens, sibiricum, elongatum and trichophorum have also been attempted.…”

Section: With Agropyronmentioning

confidence: 96%

Cytogenetics of Rye (Secale Spp.)

Jain¹

1960

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“…Moreover, a better understanding of the differentiation pattern of individual chromosomes would be s f considerable practical interest because lack of chromosome pairing is the main barrier to interspecific gene transfer. Several attempts have been made to determine the number of chromosomes potentially capable of pairing in a hybrid with incomplete pairing at metaphase 1 (Gaul, 1953(Gaul, , 1958Sficas, 1962;Sficas and Gerstel, 1962). A fortnula developed by Gaul is founded on the assumption that both arms of chromosomes capable of pairing have the same probability of forming a chiasma.…”

Section: Introductionmentioning

confidence: 99%

METAPHASE I PAIRING FREQUENCIES OF INDIVIDUALAGROPYRON ELONGATUMCHROMOSOME ARMS WITHTRITICUMCHROMOSOMES

Dvořák¹

1979

Can. J. Genet. Cytol.

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Ten aelocentric chromosomes of diploid Agropyron ekongatum (Host.) P.B. (2n = 14) were added to the chromosome complement of Trdticnam aestivum L. emend. Thell. The ditelosomic additions were crossed with Trificunt spelroides (Tausch) Gren. ex Richter, and in the tetraploid hybrids the pairing frequencies of the telosomes were determined, expressed as percent of PMC's in which a telossme paired at metaphase I. All Agropyron telosomes paired with Trin'cncrn chromosomes. The pairing frequencies ranged from 4.4% to 41.2% of the PMC's. It is concluded that none sf the ten Agropyron chromosome arms has a homologous partner among the four Tsiticunr genornes involved. The pairing frequencies did not correlate with the lengths of the telossmes. Pairing of the Agropyron alosomes in these tetfaploid hybrids approximated the chromosome pairing that occurred in a diploid hybrid T. tauschii (Coss.) Schmal. (the donor of the B genome of T . aestivum) X A . elongarurn. Bix chromosomes t6lacentriques du diploide Agropyron elongaturn (Host.) P.B. (2n -14) ont Ct6 ajoutts au comglCment des chromossmes de Trkticum aestivwm L. emend. Thel!. Les additions dittlosomiques furent croides avec Triticum spektoides (Tausch) Gren. ex Richter et ont dktermin6 la frkquence d'appariernent des tClosornes chez les hybrides tttraploides. Le taux d'appariement est exprim6 en pourcentage des CMP chez lesquels un tClosome s'est apparik en mCtaghase I. Tous les tklosomes d'Agropyron se sont apparits avec les chromosomes de T r i t i c m . La variation du taux d9nppariement se situe entre 4.4% B 41.2% du CMP. Aucun des dix bras chromosomiques d'Agropyron n'a un partenaire homologue parmi les quatre gknomes de Tritkcum utilisCs. On n'observe aucune corr6Iation entre la frkquence d'appariement et B a iongueur des t6losomes. L'appariement des ttlosomes d'Agropyron chez ces hybrides titraploides se rapproche de I'appariement chromosomique observe chez I'hybride diploide de T , tuuschii (Coss.) Schmal. (le porteur du gtnome de T . aesrivum) X A. elongaturn .

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Genomanalytische Untersuchungen bei Triticum � Agropyrum intermedium unter Ber�cksichtigung von Secale cereale � A. intermedium

Cited by 10 publications

References 83 publications

Effect of Rye on Homoeologous Chromosome Pairing in Wheat × Rye Hybrids

Effect of Rye on Homoeologous Chromosome Pairing in Wheat × Rye Hybrids

Cytogenetics of Rye (Secale Spp.)

METAPHASE I PAIRING FREQUENCIES OF INDIVIDUALAGROPYRON ELONGATUMCHROMOSOME ARMS WITHTRITICUMCHROMOSOMES

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