scholarly journals Meiotic behavior and chromosomal association of two diploid mulberry varieties, (Moraceae)

2019 ◽  
Vol 13 (2) ◽  
pp. 68-70
Author(s):  
K. H. Venkatesh ◽  
G. S. Pragathi ◽  
M. Shivashankar
Keyword(s):  
Meiotic Behavior ◽  
Chromosomal Association

Meiotic Behavior of a Hodo Sorgo ✕ Johnsongrass Hybrid 1

Crop Science ◽  
1966 ◽  
Vol 6 (2) ◽  
pp. 127-131 ◽  
Author(s):  
Hugh W. Bennett ◽  
Norman C. Merwine
Keyword(s):  
Meiotic Behavior

Meiotic Behavior in Two Lotus Species 1

Crop Science ◽  
1964 ◽  
Vol 4 (5) ◽  
pp. 483-486 ◽  
Author(s):  
E. A. Wernsman ◽  
W. F. Keim ◽  
R. L. Davis
Keyword(s):  
Meiotic Behavior

scholarly journals Meiotic behavior in nonaploid accessions of Brachiaria humidicola (Poaceae) and implications for breeding

2011 ◽  
Vol 10 (1) ◽  
pp. 169-176 ◽  
Author(s):  
K.R. Boldrini ◽  
E.V. Adamowski ◽  
N. Silva ◽  
M.S. Pagliarini ◽  
C.B. Valle
Keyword(s):  
Meiotic Behavior ◽  
Brachiaria Humidicola

scholarly journals Cytoembryological evaluation, meiotic behavior and pollen viability of Paspalum notatum tetraploidized plants

2016 ◽  
Vol 16 (4) ◽  
pp. 282-288 ◽  
Author(s):  
Karine Cristina Krycki ◽  
Carine Simioni ◽  
Miguel Dall'Agnol
Keyword(s):  
Pollen Viability ◽  
Paspalum Notatum ◽  
Meiotic Behavior

Meiotic behavior and pollen morphology variation in Centaurium pulchellum (Gentianaceae)

2010 ◽  
Vol 290 (1-4) ◽  
pp. 99-108 ◽  
Author(s):  
Gisela M. Via do Pico ◽  
Massimiliano Dematteis
Keyword(s):  
Pollen Morphology ◽  
Meiotic Behavior

THE MEIOTIC BEHAVIOR OF ANEUPOLYHAPLOIDS OF THE CULTIVATED OAT AVENA SATIVA (2n = 6x = 42)

1977 ◽  
Vol 19 (4) ◽  
pp. 651-656 ◽  
Author(s):  
J. M. Leggett
Keyword(s):  
Genetic Control ◽  
Chromosome Pairing ◽  
Avena Sativa ◽  
Meiotic Behavior ◽  
Homoeologous Chromosomes

Chromosome pairing and the frequency of secondary associations in two aneupolyhaploid plants of A. sativa are described. There was little evidence of pairing between homoeologous chromosomes in either plant. The results are discussed in relation to the genetic control of bivalent pairing in A. sativa and the possible divergence between the constituent genomes.

Cytogenetics of Elymus caucasicus and Elymus longearistatus (Poaceae: Triticeae)

Genome ◽  
1991 ◽  
Vol 34 (6) ◽  
pp. 860-867 ◽  
Author(s):  
Kevin B. Jensen ◽  
Richard R.-C. Wang
Keyword(s):  
Chromosome Pairing ◽  
Interspecific Hybrid ◽  
Intergeneric Hybrids ◽  
Cytological Analysis ◽  
Meiotic Behavior ◽  
Pseudoroegneria Spicata ◽  
Central Asian ◽  
Elymus Lanceolatus

Two accessions of Elymus caucasicus (Koch) Tzvelev and three accessions of Elymus longearistatus (Boiss.) Tzvelev were studied to determine the meiotic behavior and chromosome pairing in the two taxa, their interspecific hybrid, and their hybrids with various "analyzer" parents. Interspecific and intergeneric hybrids of the target taxa were obtained with the following analyzer species: Pseudoroegneria spicata (Pursh) A. Löve (2n = 14, SS), Pseudoroegneria libanotica (Hackel) D. R. Dewey (2n = 14, SS), Hordeum violaceum Boiss. &Hohenacker (2n = 14, HH) (= Critesion violaceum (Boiss. &Hohenacker) A. Löve), Elymus lanceolatus (Scribn. &Smith) Gould (2n = 28, SSHH), Elymus abolinii (Drob.) Tzvelev (2n = 28, SSYY), Elymus pendulinus (Nevski) Tzvelev (2n = 28, SSYY), Elymus fedtschenkoi Tzvelev (2n = 28, SSYY), Elymus panormitanus (Parl.) Tzvelev (2n = 28, SSYY), and Elymus drobovii (Nevski) Tzvelev (2n = 42, SSHHYY). Cytological analysis of their F1 hybrids showed that E. caucasicus and E. longearistatus were allotetraploids comprising the same basic genomes. Chromosome pairing in the E. caucasicus × P. libanotica hybrid demonstrated that the target taxa contained the S genome, based on 6.1 bivalents per cell. The lack of chromosome pairing, less than one bivalent per cell, in the E. longearistatus × H. violaceum hybrid showed that the H genome was absent. Increased pairing in the tetraploid and pentaploid hybrids when the Y genome was introduced indicated that the second genome in the two taxa was a segmental homolog of the Y genome. The S and Y genomes in E. caucasicus and E. longearistatus have diverged from each other and from those in many of the eastern and central Asian SY tetraploids.Key words: genome, meiosis, chromosome pairing, morphology, hybrid, Triticeae.

Genome affinity and meiotic behaviour in trigenomic hybrids and their doubled allohexaploids between three cultivated Brassica allotetraploids and Brassica fruticulosa

Genome ◽  
2012 ◽  
Vol 55 (2) ◽  
pp. 164-171 ◽  
Author(s):  
J.P. Chen ◽  
X.H. Ge ◽  
X.C. Yao ◽  
Z.Y. Li
Keyword(s):  
Wild Species ◽  
Chromosome Doubling ◽  
Brassica Species ◽  
Low Fertility ◽  
Meiotic Behavior ◽  
Homologous Pairing ◽  
Mother Cells ◽  
Relationship Of ◽  
Brassica Fruticulosa ◽  
Cytological Behaviour

The wild species Brassica fruticulosa Cyr. (FF, 2n = 16) is closely related to the cultivated Brassica species. Through interspecific reciprocal crosses between B. fruticulosa and three cultivated Brassica allotetraploids (AABB, AACC, and BBCC where A = 10, B = 8, and C = 9), four trigenomic hybrids (F.AC, 2n = 27; F.AB, 2n = 26; F.BC, 2n = 25; BC.F, 2n = 25) were produced. By chromosome doubling of respective hybrids, three allohexaploids (FF.AACC, 2n = 54; FF.AABB, 2n = 52; BBCC.FF, 2n = 50) were synthesized. In pollen mother cells (PMCs) of the trigenomic hybrids, 1–2 autosyndetic bivalents were detected within A, B, and C genomes but only one within F genome; 1–3 allosyndetic bivalents between any two genomes were observed, and a closer relationship of F and B genomes than F and A genomes or F and C genomes was revealed. The allohexaploids showed a generally low but different pollen fertilities. The chromosomes in PMCs were predominantly paired as bivalents but some univalents and multivalents at variable frequencies were observed. The bivalents of homologous pairing for each genome prevailed, but allosyndetic quadrivalents and hexavalents involving any two genomes were observed, together with autosyndetic quadrivalents for A, B, and C genomes but not the F genome. The nondiploidized cytological behaviour of these allohexaploids contributed to their low fertility. The relationships between the genome affinity and meiotic behavior in these allohexaploids were discussed.

Meiotic behavior of hybrids of pigeonpea and two Australian native Atylosia species

1987 ◽  
Vol 78 (4) ◽  
pp. 261-265 ◽  
Author(s):  
I. S. Dundas ◽  
E. J. Britten ◽  
D. E. Byth ◽  
G. H. Gordon
Keyword(s):  
Meiotic Behavior ◽  
Atylosia Species
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