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 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 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.

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

RIBOSOMAL GENE LOCALIZATION AND DISTRIBUTION (ARRANGEMENT) WITHIN THE NUCLEOLAR ORGANIZER REGION OF ZEA MAYS

Genetics ◽  
1975 ◽  
Vol 80 (3) ◽  
pp. 505-518
Author(s):  
Samuel A Ramirez ◽  
John H Sinclair
Keyword(s):  
Zea Mays ◽  
Organizer Region ◽  
Nucleolar Organizer Region ◽  
Nucleolar Organizer ◽  
B Chromosome ◽  
Ribosomal Gene ◽  
Ribosomal Genes ◽  
Rrna Genes ◽  
Gene Localization ◽  
Chromosome 6

ABSTRACT Cytogenetic and molecular hybridization techniques were used to examine the arrangement of rRNA genes at the nucleolar organizer region (NOR) of maize. TB-6a stocks involving a reciprocal translocation between a B chromosome and the NOR of chromosome 6 were used. The amount of rDNA in the different stocks used varied from 1.5 to 4 NOR equivalents depending on the number of B6 choromosomes present. Cytological measurements show that the medial break through the NOR results in an equal partitioning of the heterochromatic knob (the NOR) between chromosome 6 and the B chromosome to which it was translocated. DNA-rRNA hybridization experiments show a linear relationship between the amount of rRNA capable of hybridizing with DNA and the number of NOR equivalents present. The data confirm McClintock's conclusion that the heterochromatic knob, rather than the constricted portion, is the true NOR region. Further, they show that the number of ribosomal genes is correlated with the amount of cytologically visible NOR, suggesting a uniform distribution of genes throughout the locus.

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

scholarly journals Changing sex for selfish gain: B chromosomes of Lake Malawi cichlid fish

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Frances E. Clark ◽  
Thomas D. Kocher
Keyword(s):  
Linkage Group ◽  
Transmission Rate ◽  
Cichlid Fish ◽  
Meiotic Drive ◽  
B Chromosome ◽  
Lake Malawi ◽  
B Chromosomes ◽  
Normal Complement ◽  
Biased Sex Ratio ◽  
Average Transmission

AbstractB chromosomes are extra, non-essential chromosomes present in addition to the normal complement of A chromosomes. Many species of cichlid fish in Lake Malawi carry a haploid, female-restricted B chromosome. Here we show that this B chromosome exhibits drive, with an average transmission rate of 70%. The offspring of B-transmitting females exhibit a strongly female-biased sex ratio. Genotyping of these offspring reveals the B chromosome carries a female sex determiner that is epistatically dominant to an XY system on linkage group 7. We suggest that this sex determiner evolved to enhance the meiotic drive of the B chromosome. This is some of the first evidence that female meiotic drive can lead to the invasion of new sex chromosomes solely to benefit the driver, and not to compensate for skewed sex ratios.

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 B chromosome contains active genes and impacts the transcription of A chromosomes in maize (Zea mays L.)

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Wei Huang ◽  
Yan Du ◽  
Xin Zhao ◽  
Weiwei Jin
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
B Chromosome ◽  
Active Genes
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