scholarly journals THE EFFECTS OF B, K10, AND AR CHROMOSOMES ON THE RESISTANCE OF MAIZE TO VIRAL INFECTION

Genetics ◽  
1978 ◽  
Vol 90 (2) ◽  
pp. 331-338
Author(s):  
Scott C McGirr ◽  
J E Endrizzi
Keyword(s):  
Zea Mays ◽  
Viral Infection ◽  
Mosaic Virus ◽  
Zea Mays L ◽  
Brome Mosaic Virus ◽  
B Chromosomes ◽  
Maize Dwarf Mosaic Virus ◽  
Barley Stripe Mosaic Virus ◽  
Test Results ◽  
Leaf Necrosis

ABSTRACT Studies were conducted to determine if accessory (B) chromosomes, the abnormal tenth (K10) chromosome or the aberrant ratio (AR) phenomenon of maize (Zea mays L.) affect the resistance of the plants to viral infection. Genetically similar stocks of maize with and without these elements were compared to determine what effect they would have on the plants response to Brome Mosaic Virus (BMV), Maize Dwarf Mosaic Virus (MDMV), Wheat Streak Mosaic Virus (WSMV) and Barley Stripe Mosaic Virus (BSMV).—The test results with BSMV were not found to be conclusive. With BMV and MDMV, neither the B orK10 chromosomes were found to alter infections; however, these chromosomes were found to affect the resistance of the plants to WSMV infection. The B chromosomes were found to delay the onset of leaf necrosis by 15%, while the K10 chromosome was found to increase the susceptibility to necrosis by 100%. The AR phenomenon was not found to alter the resistance of maize to BMV infection. However, it was found to increase the susceptibility of maize to MDMV infection by 36% and to decrease the susceptibility of maize to WSMV infection by 92%.

Resistance of Inheritance to Maize Dwarf Mosaic Virus in Maize ( Zea mays L.) 1

Crop Science ◽  
1970 ◽  
Vol 10 (4) ◽  
pp. 412-415 ◽  
Author(s):  
E. J. Dollinger ◽  
W. R. Findley ◽  
L. E. Williams
Keyword(s):  
Zea Mays ◽  
Mosaic Virus ◽  
Zea Mays L ◽  
Maize Dwarf Mosaic Virus

scholarly journals Impact of Seed-Transmitted Viruses on Quality of Cereal Seeds

2009 ◽  
Vol 49 (4) ◽  
pp. 460-464
Author(s):  
Małgorzata Jeżewska ◽  
Katarzyna Trzmiel
Keyword(s):  
Risk Assessment ◽  
Mosaic Virus ◽  
Potential Risk ◽  
Plant Material ◽  
Plant Protection ◽  
Seed Transmission ◽  
Maize Dwarf Mosaic Virus ◽  
Barley Stripe Mosaic Virus ◽  
Barley Cultivars

Impact of Seed-Transmitted Viruses on Quality of Cereal SeedsAmong seed-transmitted cereal viruses the most important isBarley stripe mosaic virus(BSMV), infecting barley. Investigations on the occurrence of BSMV in Poland have been carried out in the Institute of Plant Protection in Poznań since 2000. The studies aimed at the evaluation of the BSMV distribution in plant material, the rate of its seed transmission in different barley cultivars and the assessment of the effect of barley infection on the yield. The potential risk of BSMV occurrence for barley crops was discussed. The rate of infection by two seed-transmitted viruses,Maize dwarf mosaic virus(MDMV) andSugarcane mosaic virus(SCMV), in Poland was investigated in view of the risk assessment.

Adjacent II segregation products in B–A translocations of maize

Genome ◽  
1991 ◽  
Vol 34 (4) ◽  
pp. 595-602 ◽  
Author(s):  
B. Kindiger ◽  
C. Curtis ◽  
J. B. Beckett
Keyword(s):  
Zea Mays ◽  
Key Words ◽  
Zea Mays L ◽  
Genetic Data ◽  
B Chromosomes ◽  
Cytological Data ◽  
Opposite Pole

In maize (Zea mays L.), meiotic events in B–A translocations that cause the A chromosome to move to one pole and the A–B and B–A chromosomes to move to the opposite pole result in the production of balanced, functional microspores and megaspores. Meiotic events that allow other combinations of chromosomes to proceed to the two poles (A A–B and A B–A) lead to the production of both duplicate (A A–B) and deficient (B–A) spores. Microspores and often megaspores that are deficient for a segment of the A chromosome are expected to abort. Duplication-bearing gametes usually function through the egg but are less able to compete with the normal gametes in the pollen. Cytological data, and genetic data from pollen, kernel, and seedling counts, were used to identify the production of A A–B gametes by B–A translocation heterozygotes and hyperploids. Adjacent II segregation of the A and A–B chromosomes of B–A heterozygotes and hyperploids has been detected in stocks of several different B–A translocations. Some B–A translocations exhibited a frequency of adjacent II segregation as high as 23%.Key words: Zea mays, adjacent segregation, B chromosomes, translocation.

scholarly journals Ocorrência de doenças causadas por molicutes e por vírus em milho nas Províncias de Tucumán e de Córdoba na Argentina

2002 ◽  
Vol 27 (4) ◽  
pp. 403-407 ◽  
Author(s):  
MARIA P. GIMÉNEZ PECCI ◽  
ELIZABETH DE OLIVEIRA ◽  
RENATO O. RESENDE ◽  
IRMA G. LAGUNA ◽  
LUÍS R CONCI ◽  
...  
Keyword(s):  
Zea Mays ◽  
Mosaic Virus ◽  
Western Blotting ◽  
Maize Dwarf Mosaic Virus ◽  
Dalbulus Maidis ◽  
Delphacodes Kuscheli ◽  
Maize Bushy Stunt Phytoplasma ◽  
Maize Rayado Fino Virus

A incidência de doenças causadas por molicutes e por vírus foi avaliada em lavouras de milho (Zea mays) nas Províncias de Tucumán e de Córdoba, na Argentina, em fevereiro de 2000. Na Província de Tucumán verificou-se que 44% das lavouras apresentaram altos níveis de incidência de plantas com sintomas de enfezamentos causados por molicutes (50 a 100%), em altitudes variando de 300 a 2.000 m. A presença de fitoplasma e de espiroplasma foi confirmada em amostras de folhas de plantas com sintomas de enfezamentos, através dos testes de PCR e de "Western blotting". Constatou-se, porém, que a eficiência desses testes para detecção destes patógenos, quando os sintomas apresentados pelas plantas eram muito acentuados, foi da ordem de 70%, e de apenas 30% quando os sintomas eram menos acentuados. Na localidade Jesus Maria, foram encontradas plantas apresentando acentuado nanismo, folhas estreitas e com deformações. Dentre quatro amostras destas plantas, submetidas a testes de PCR, em duas foi detectada a presença de fitoplasma, possivelmente d istinto do "Maize Bushy Stunt Phytoplasma". A cigarrinha Dalbulus maidis, inseto vetor dos molicutes, foi encontrada apenas em Tucumán, estando ausente em Córdoba. O Mal de Rio Cuarto virus foi detectado em seis lavouras em Córdoba, e em três em Tucumán. A cigarrinha Delphacodes kuscheli foi detectada em todas as lavouras em Córdoba, e em apenas três lavouras em Tucumán. O Maize dwarf mosaic virus foi detectado em cerca de 60% das lavouras amostradas nas duas Províncias e o Maize rayado fino virus em apenas uma localidade em Tucumán.

B chromosomes of maize ( Zea mays L.) are positioned nonrandomly within sperm nuclei

2001 ◽  
Vol 13 (4) ◽  
pp. 231-234 ◽  
Author(s):  
Maxine Losoff Rusche ◽  
H. L. Mogensen ◽  
Annie Chaboud ◽  
Jean-Emmanuel Faure ◽  
Mireille Rougier ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
B Chromosomes ◽  
Sperm Nuclei

scholarly journals Reactions of Sweet Corn Hybrids with Resistance to Maize Dwarf Mosaic

Plant Disease ◽  
1997 ◽  
Vol 81 (5) ◽  
pp. 460-464 ◽  
Author(s):  
M. R. Kerns ◽  
J. K. Pataky
Keyword(s):  
Zea Mays ◽  
Mosaic Virus ◽  
Sweet Corn ◽  
Sugarcane Mosaic Virus ◽  
Maize Dwarf Mosaic Virus ◽  
Corn Hybrids ◽  
High Incidence ◽  
Symptomatic Tissue

Maize dwarf mosaic (MDM), caused by the sugarcane mosaic subgroup of potyviruses, can substantially reduce yield and ear quality of sweet corn (Zea mays). The effects of strain A of maize dwarf mosaic virus (MDMV-A) and strain MDMV-B of sugarcane mosaic virus (SCMV-MB) on resistant sweet corn hybrids were evaluated. Incidence of symptomatic plants, types of symptomatic responses, yield, and ear quality were compared among 20 hybrids in 1993 and 14 hybrids in 1994. Incidence of symptomatic plants measured at the beginning of harvest ranged from 4 to 100% in 1993 and 1 to 100% in 1994 and differed among hybrids inoculated with MDMV-A and/or SCMV-MB. Hybrids BiGuard, Dallas, HMX 9352, and Topacio had low (<20%) incidences of symptomatic plants when inoculated with MDMV-A, SCMV-B, or MDMV-A/SCMV-MB. Some hybrids had moderate responses, with incidence varying around 25%. Some hybrids appeared to have greater resistance to MDMV-A than to SCMV-MB. The incidence of sectoring plants (i.e., distinct bands or sectors of asymptomatic and symptomatic tissue) was higher for hybrids with high levels of resistance and ranged from 0 to 14% in 1993 and 0 to 83% in 1994. Ear weight of inoculated hybrids, expressed as a percentage of the non-inoculated control, ranged from 84 to 109% in 1993 and from 84 to 105% in 1994. Slope coefficients from regressions of percent ear weight on incidence ranged from -0.085 to -0.15. Butt blanking was associated with high incidence of MDM-symptomatic plants. None of the commercially available MDM-resistant sweet corn hybrids were 100% asymptomatic, but levels of resistance in most of these hybrids were adequate to minimize the effects of MDM on yield.

scholarly journals Proteomic and Phytohormone Analysis of the Response of Maize (Zea mays L.) Seedlings to Sugarcane Mosaic Virus

PLoS ONE ◽  
2013 ◽  
Vol 8 (7) ◽  
pp. e70295 ◽  
Author(s):  
Liuji Wu ◽  
Shunxi Wang ◽  
Xiao Chen ◽  
Xintao Wang ◽  
Liancheng Wu ◽  
...  
Keyword(s):  
Zea Mays ◽  
Mosaic Virus ◽  
Zea Mays L ◽  
Sugarcane Mosaic Virus

BANDING PATTERNS IN MAIZE MITOTIC CHROMOSOMES

1980 ◽  
Vol 22 (1) ◽  
pp. 61-67 ◽  
Author(s):  
E. J. Ward
Keyword(s):  
Zea Mays ◽  
Chromosome Banding ◽  
Zea Mays L ◽  
B Chromosomes ◽  
Abnormal Chromosome ◽  
Root Tip ◽  
Mitotic Chromosomes ◽  
Chromosome 10 ◽  
Banding Patterns

A procedure for chromosome banding in triticale has been shown to be equally effective on maize, Zea mays L., root tip chromosomes. Stocks of known knob constitution were used to demonstrate that differentially stained regions of C-banded mitotic chromosomes corresponded with knobs. The large knob and prominent chromomeres of abnormal chromosome 10 were also differentiated, as was the centric heterochromatin of B chromosomes. However, the large distal heterochromatic portion of the B was not differentiated by the procedure.

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