scholarly journals Partial preferential chromosome pairing is genotype dependent in tetraploid rose

2017 ◽  
Vol 90 (2) ◽  
pp. 330-343 ◽  
Author(s):  
Peter M. Bourke ◽  
Paul Arens ◽  
Roeland E. Voorrips ◽  
G. Danny Esselink ◽  
Carole F. S. Koning-Boucoiran ◽  
...  
Keyword(s):  
Chromosome Pairing ◽  
Preferential Chromosome Pairing

scholarly journals Chromosome Homology in Tetraploid Southern Highbush × Vaccinium elliottii Hybrids

HortScience ◽  
2003 ◽  
Vol 38 (2) ◽  
pp. 263-265 ◽  
Author(s):  
T.F. Wenslaff ◽  
P.M. Lyrene
Keyword(s):  
Chromosome Pairing ◽  
Highbush Blueberry ◽  
Yellow Leaf ◽  
Green Color ◽  
Vegetative Tissues ◽  
Bright Yellow ◽  
Preferential Chromosome Pairing ◽  
Southern Highbush ◽  
Wildtype Allele ◽  
Meiosis I

A yellow-leaf seedling marker, r, was used to determine if there was preferential chromosome pairing in a group of tetraploid southern highbush blueberry hybrids. Plants with four copies of r (no copies of R) fail to develop anthocyanins, and cotyledons, hypocotyls, leaves, stems, and other vegetative tissues have a bright yellow-green color. In the hybrids that were studied, two genomes were from the diploid wild species, V. elliottii Chapman, and both carried the recessive marker r. The other two genomes were from southern highbush cultivars and both carried the dominant wildtype allele, R. When RRrr hybrids were intercrossed or crossed to rrrr yellow-leaf plants, the number of yellowleaf rrrr seedlings obtained usually equalled or exceeded the number predicted from nonpreferential chromosome pairing. Since rr gametes can only be produced by RRrr plants when R and r chromosomes pair at Meiosis I, there was no evidence that the chromosomes derived from V. elliottii were pairing at a higher-than-random rate.

scholarly journals Correct Estimation of Preferential Chromosome Pairing in Autotetraploids

2004 ◽  
Vol 14 (3) ◽  
pp. 459-462 ◽  
Author(s):  
D. Cao
Keyword(s):  
Chromosome Pairing ◽  
Preferential Chromosome Pairing ◽  
Correct Estimation

INTERSPECIFIC CROSSES INVOLVING ALFALFA. IV. Medicago glomerata × M. sativa with reference to M. prostrata

1968 ◽  
Vol 10 (3) ◽  
pp. 536-544 ◽  
Author(s):  
K. Lesins
Keyword(s):  
Chromosome Pairing ◽  
Seed Set ◽  
Interspecific Crosses ◽  
Good Seed ◽  
Chromosome Behavior ◽  
Separate Species ◽  
Meiotic Irregularities ◽  
Preferential Chromosome Pairing ◽  
Morphological Differences ◽  
Anthocyanin Production

A good seed set was obtained from crosses of Medicago glomerata Balb. with M. sativa L. There was no evidence of a preferential chromosome pairing effect on segregation for floral anthocyanin. From an analysis of different M. glomerata × M. sativa crosses four factors were found to be involved in anthocyanin production. About 90% of the cells showed normal chromosome behavior during meiosis. Taxonomically, M. glomerata stands somewhat apart from the M. sativa — falcata complex, as indicated by a lower seed set from intercrossed F1's, and by somewhat higher numbers of meiotic irregularities in the F1 plants. With these and other morphological differences M. glomerata is considered as a separate species. When hybridized with M. prostrata Jacq., M. glomerata responded in a similar manner to that of M. sativa. The weight of seeds produced by M. glomerata plants was approximately the same, whether fertilized by M. glomerata or by M. sativa pollen. There is a somewhat greater affinity between M. glomerata and M. prostrata than between M. sativa and M. prostrate; M. prostrata plants fertilized by M. glomerata pollen had better seed development than those fertilized by M. sativa.

Tetraploid races of Paspalum notatum show polysomic inheritance and preferential chromosome pairing around the apospory-controlling locus

2004 ◽  
Vol 109 (1) ◽  
pp. 186-191 ◽  
Author(s):  
J. Stein ◽  
C. L. Quarin ◽  
E. J. Martínez ◽  
S. C. Pessino ◽  
J. P. A. Ortiz
Keyword(s):  
Chromosome Pairing ◽  
Paspalum Notatum ◽  
Polysomic Inheritance ◽  
Preferential Chromosome Pairing

scholarly journals Detecting Nature of Chromosome Pairing in A and E Genomes of Oryza

CYTOLOGIA ◽  
2009 ◽  
Vol 74 (2) ◽  
pp. 223-227
Author(s):  
Fida Mohammad Abbasi ◽  
Habib Ahmad ◽  
Mohammad Sajid ◽  
Inamullah ◽  
Darshan Singh Brar
Keyword(s):  
Chromosome Pairing

Chromosome pairing in female and male diploid and polyploid anurans (Amphibia) from South America

1983 ◽  
Vol 25 (5) ◽  
pp. 487-494
Author(s):  
I. M. Rahn ◽  
A. Martinez
Keyword(s):  
South America ◽  
Genetic Control ◽  
Chromosome Pairing ◽  
Diploid Males ◽  
Terminal Chiasmata

Chromosome pairing in females and males of diploid (2n = 22) and tetraploid (2n = 44) Odontophrynus americanus and diploid Ceratophrys cranwelli (2n = 26) and tetraploid C. ornata (2n = 104) showed that diploid females formed more chiasmata per paired arm than diploid males and polyploids of both sexes. There was a reduction in the level of recombination in female polyploids by forming multivalents with terminal chiasmata. The reduction reflected a change in the genetic control of pairing in females after polyploidization.

Sign in / Sign up

Export Citation Format

Share Document