Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)

1996 ◽  
Vol 83 (9) ◽  
pp. 1107-1112 ◽  
Author(s):  
Marcela Rosato ◽  
Amilcar M. Chiavarino ◽  
Carlos A. Naranjo ◽  
María J. Puertas ◽  
Lidia Poggio
Keyword(s):  
Zea Mays ◽  
Genetic Control ◽  
Transmission Rate ◽  
B Chromosome ◽  
Chromosome Transmission

scholarly journals Localization of the genes controlling B chromosome transmission rate in maize (Zea mays ssp. mays , Poaceae)

1998 ◽  
Vol 85 (11) ◽  
pp. 1581-1585 ◽  
Author(s):  
Amilcar M. Chiavarino ◽  
Marcela Rosato ◽  
Pablo Rosi ◽  
Lidia Poggio ◽  
Carlos A. Naranjo
Keyword(s):  
Zea Mays ◽  
Transmission Rate ◽  
B Chromosome ◽  
Chromosome Transmission

Genetic control of B chromosome transmission in maize and rye

2000 ◽  
pp. 79-92 ◽  
Author(s):  
María J. Puertas ◽  
Guillermo Jiménez ◽  
Silvia Manzanero ◽  
A. Mauricio Chiavarino ◽  
Marcela Rosato ◽  
...  
Keyword(s):  
Genetic Control ◽  
B Chromosome ◽  
Chromosome Transmission

Genetic control of B chromosome transmission in Aegilops speltoides (Poaceae)

1994 ◽  
Vol 81 (11) ◽  
pp. 1502-1507 ◽  
Author(s):  
Antonio Cebria ◽  
Maria Luisa Navarro ◽  
Maria J. Puertas
Keyword(s):  
Genetic Control ◽  
B Chromosome ◽  
Aegilops Speltoides ◽  
Chromosome Transmission

scholarly journals Maternal imprinting effect on B chromosome transmission in rye

Heredity ◽  
1990 ◽  
Vol 64 (2) ◽  
pp. 197-204 ◽  
Author(s):  
M J Puertas ◽  
M M Jiménez ◽  
F Romera ◽  
J M Vega ◽  
M Díez
Keyword(s):  
B Chromosome ◽  
Chromosome Transmission ◽  
Maternal Imprinting

scholarly journals Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)

2013 ◽  
Vol 85 (4) ◽  
pp. 1371-1377 ◽  
Author(s):  
MANOLO PENITENTE ◽  
TATIANA A. VOLTOLIN ◽  
JOSE A. SENHORINI ◽  
JEHUD BORTOLOZZI ◽  
FAUSTO FORESTI ◽  
...  
Keyword(s):  
Transmission Rate ◽  
B Chromosome ◽  
B Chromosomes ◽  
Rate Variation ◽  
Parental Line ◽  
Prochilodus Lineatus ◽  
Extinction Process ◽  
Cytogenetic Studies ◽  
Acrocentric Chromosomes ◽  
Interesting System

Cytogenetic studies were developed in Prochilodus lineatus (Valenciennes 1836), describing an interesting system of small supernumerary chromosomes. The purpose of this work is to study the frequency and morphology of B chromosomes in individuals from the parental line and the inheritance patterns of these elements in individuals obtained from controlled crosses in the species P. lineatus. The transmission rate of B chromosomes revealed a kB=0.388 for the acrocentric type, a kB=0.507 for the metacentric type and a kB=0.526 for the submetacentric type. The obtained results raise hypothesis that B-acrocentric chromosomes are involved in an extinction process in this species, while the metacentric and submetacentric supernumerary elements comprises a neutral mechanism and follows a Mendelian transmission rate.

scholarly journals Preparing of Cornstarch (Zea mays) Bioplastic Using ZnO Metal

2018 ◽  
Vol 1 (1) ◽  
pp. 23
Author(s):  
Nurwani Hayati ◽  
Lazulva Lazulva
Keyword(s):  
Tensile Strength ◽  
Zea Mays ◽  
Water Vapor ◽  
Water Content ◽  
Transmission Rate ◽  
Test Results ◽  
Mixing Process ◽  
Water Vapor Transmission Rate ◽  
Water Vapour Transmission Rate ◽  
Water Vapor Transmission

The manufacture of the bioplastic was done through the mixing process using an aquades solvent with a ratio massa 10 gram and 7 gram cornstarch, 150 mL aquades, 2 Ml glycerol and 0,5 gram ZnO. This study aim to find out physical characteristies (water vapour transmission rate, water content, thickness,biodegradation) and mechanical charateristics (tensile strength, elongasi, modulus young) are made of cornstrach (Zea mays) using ZnO metal. From the test results tensile strength was 2.744-4.018 Mpa, percentage of elongation was 28.4632.383%, modulus young’s was 8.9031026535-14.08617709Mpa, thickness was 0.16-0.29mm, water vapor transmission rate was 0.4329-1.52525g/m2.24 hours, water content was 13.5-14.5%, and biodegradation was 3.7798-7.0346% and 455-809 days.

Factors influencing transmission of alfalfa mosaic virus through seed of annual medics (Medicago spp.) and the genetic control of seed transmission rate

1997 ◽  
Vol 48 (7) ◽  
pp. 989 ◽  
Author(s):  
W. Pathipanawat ◽  
R. A. C. Jones ◽  
K. Sivasithamparam
Keyword(s):  
Mosaic Virus ◽  
Genetic Control ◽  
Transmission Rate ◽  
Alfalfa Mosaic Virus ◽  
Seed Transmission ◽  
Virus Concentration ◽  
Rate Condition ◽  
Reciprocal Crosses ◽  
Transmission Rates ◽  
Annual Medics

Factors likely to influence rates of transmission of alfalfa mosaic virus (AMV) through seed to seedlings of annual medics (Medicago spp.) and genetic control of the magnitude of its seed transmission rate were investigated in plants from 17 early-flowering accessions of M. polymorpha and in progenies of crosses involving M. murex cv. Zodiac × accession 5320 as parents. Plants were graft-inoculated when 6 weeks old to ensure successful and uniform infection. To exclude variation in seed transmission rates due to virus isolate or temperature, only 1 AMV isolate was used and the plants were kept under uniform temperature conditions. In M. polymorpha, significant differences were found between accessions in the levels of AMV transmitted through seed to progeny seedlings, SA 8250 giving the highest mean level of seed transmission (52%) and SA 4188 the lowest (3%). Neither virus concentration nor symptom severity influenced the rates of seed transmission obtained. However, part of the variation in seed transmission rates found in these accessions was related to their flowering times, seed transmission rates increasing as the interval between inoculation and owering increased. In seed samples collected from individual graft-inoculated plants of M. murex from (i) the F2 generation from crosses and reciprocal crosses, and (ii) the backcross progenies, the rates of transmission of AMV through seed to seedlings ranged from 0 to 77% and showed a continuous pattern of variation. Also, there was evidence of transgressive segregation for the low seed transmission rate condition. This indicates that the low seed transmission rate condition for AMV in medics is quantitatively inherited and under polygenic control. In contrast, when the pods from F2 progeny plants from the crosses and reciprocal crosses were examined, the segregation ratios obtained revealed that the smooth pod character from parent accession 5320 was controlled by a single recessive gene, for which the name sp is proposed. The presence in a plant of gene sp, or of its spiny pod-determining allele from the other parent cv. Zodiac, was not correlated with low seed transmission rates of AMV. It is concluded that selection for low rates of seed transmission and a population breeding approach can be used to produce improved M. polymorpha and M. murex cultivars with good resistance to seed-borne AMV

scholarly journals Nonreciprocal partial cross-incompatibility in maize

1983 ◽  
Vol 25 (3) ◽  
pp. 270-277 ◽  
Author(s):  
Kitisri Sukhapinda ◽  
Peter A. Peterson
Keyword(s):  
Zea Mays ◽  
Genetic Control ◽  
Reciprocal Cross ◽  
Zea Mays L ◽  
Seed Set ◽  
Pollen Type ◽  
Incompatible Pollen ◽  
Genetic Stocks ◽  
Normal Seed ◽  
Controlling Elements

A case of cross-incompatibility among crosses in our genetics nursery was first observed in 1975. These crosses though involving controlling elements in maize (Zea mays L.) do not necessarily implicate these elements. When the derivative genotypes from the genetic stocks were crossed by specific male parents, ears with reduced seed set (RSS) were produced. In the reciprocal cross where these same genetic stocks were used as the male parent, ears with normal seed set (NSS) were obtained. The RSS effect is a heritable character caused by an incompatibility interaction between the female tissue and a specific pollen type. The genetic control of the incompatibility interaction has been hypothesized to be influenced by a cytoplasmic–chromosomal interaction in the female and a chromosomal factor in the pollen. The site of the incompatibility interaction is not on the silk surface because the incompatible pollen germinated and developed normally on the silk surface. Thus, the incompatibility interaction can occur either inside the silk or the ovule.

scholarly journals Genome size and numerical polymorphism for the B chromosome in races of maize (Zea mays ssp. mays, Poaceae)

1998 ◽  
Vol 85 (2) ◽  
pp. 168-174 ◽  
Author(s):  
Marcela Rosato ◽  
Amilcar M. Chiavarino ◽  
Carlos A. Naranjo ◽  
Julian Camara Hernandez ◽  
Lidia Poggio
Keyword(s):  
Zea Mays ◽  
Genome Size ◽  
B Chromosome
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