Genetic control of maternal haploidy in maize (Zea mays L.) and selection of haploid inducing lines

1988 ◽  
Vol 76 (3) ◽  
pp. 405-410 ◽  
Author(s):  
P. Lashermes ◽  
M. Beckert
Keyword(s):  
Zea Mays ◽  
Genetic Control ◽  
Zea Mays L ◽  
Selection Of

scholarly journals Selection of best lines and hybrids on the basis of genetic variability analysis in Maize (Zea mays L.)

2020 ◽  
Vol 5 (01) ◽  
pp. 45-49
Author(s):  
Ankit Kumar ◽  
Amit Tomar
Keyword(s):  
Zea Mays ◽  
Genetic Variability ◽  
Grain Yield ◽  
Plant Height ◽  
Zea Mays L ◽  
Grain Weight ◽  
Variability Analysis ◽  
Selection Of

The results revealed that parents namely, TSK-10, TSK-27, New Blue-II, Kurara and TSK-109 were found highly genetic diverse for days to 50% tasseling, days to 50% silking, days to 755 dry husk. The parents namely, TSK-109, Kurara, New Blue-II and TSK-10 were found highly genetic diverse for plant height (cm), cob height, number of cobs per plant and number of grains per cob. The parents namely, Kurara, TSK-109, TSK-10, New Blue-II and TSK-27 were found highly genetic diverse for shelling percentage, grain yield per plant, grain yield per cob and 100-grain weight.

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 TOLERÂNCIA GENÉTICA DE LINHAGENS DE MILHO AOS HERBICIDAS TEMBOTRIONE E NICOSULFURON

2018 ◽  
Vol 17 (2) ◽  
pp. 317
Author(s):  
ADILSON RICKEN SCHUELTER ◽  
MAYARA FABIANA SILVA ◽  
JONATAS MARCOLIN ◽  
IVAN SCHUSTER ◽  
ISABEL PRAZERES DE SOUZA
Keyword(s):  
Zea Mays ◽  
Genetic Control ◽  
Zea Mays L ◽  
Block Design ◽  
Inbred Lines ◽  
Chi Square ◽  
Crop Tolerance ◽  
Maize Productivity ◽  
Maize Inbred Lines ◽  
Chi Square Test

 RESUMO - As plantas daninhas constituem um dos fatores que reduzem a produtividade do milho e, portanto, é importante conhecer o mecanismo de tolerância da cultura aos herbicidas, de forma a fornecer informações que minimizem os riscos de danos aos cultivos. Dessa forma, o objetivo do trabalho foi avaliar a resposta de linhagens de milho e o controle genético envolvido na tolerância aos herbicidas nicosulfuron e tembotrione. Duzentas e cinco linhagens de milho foram avaliadas quanto à reação aos herbicidas. Para a avaliação do controle genético de tolerância aos herbicidas foram empregadas duas linhagens tolerantes e duas sensíveis, as quais foram intercruzadas empregando um dialelo de meia tabela. As linhagens e as populações oriundas desses cruzamentos foram avaliadas quanto à reação aos herbicidas em delineamento de blocos casualizados com quatro repetições. As dosagens foram de 60 g ha-1 de nicosulfuron (Sanson®) e 100 g ha-1 de tembotrione (Soberan®). A avaliação fenotípica constituiu-se de número de plantas sensíveis e/ou tolerantes e o teste do Qui-quadrado (χ2) foi utilizado nas análises. Quanto à resposta à aplicação dos agroquímicos verificaram-se linhagens tolerantes ou sensíveis a ambos os herbicidas ou apenas a um deles. Nas avaliações do controle genético, as análises evidenciaram um gene com dominância completa que, pela análise de segregação das famílias F3, permitiu levantar a hipótese de genes fortemente ligados ou pleiotrópicos. Os resultados obtidos, associados ao retrocruzamento assistido por marcadores moleculares (RCAM), auxiliaram o processo de introgressão da tolerância nas linhagens sensíveis aos herbicidas nicosulfuron e tembotrione.Palavras-chave: Zea mays L., herança, melhoramento genético, marcadores moleculares.GENETIC TOLERANCE OF MAIZE LINES TO TEMBOTRIONE AND NICOSULFURON ABSTRACT - As weeds are one of the factors that reduce maize productivity it is important to know the mechanism of crop tolerance to herbicide in order to minimize the risk of damage to the plants. Thus, the objective of this work was to evaluate the response of maize inbred lines and the genetic control of the tolerance to the herbicides nicosulfuron and tembotrione. Two hundred and five maize inbred lines were evaluated for herbicides reaction. For the evaluation of the genetic control of tolerance to herbicides, two tolerant and two sensitive inbred lines were used, which were intercrossed using a half diallel table. The inbred lines and the populations obtained from these crosses were evaluated for reaction to the herbicides in a randomized complete block design with 4 replicates. The dosages were 60 g ha-1 of nicosulfuron (Sanson™) and 100 g ha-1 of tembotrione (Soberan™). The phenotypic evaluation was based on the number of sensitive and / or tolerant plants and the chi-square test (χ2) was used in the analysis. Regarding the response to the application of the agrochemicals, inbred lines were tolerant or sensitive to one or both herbicides. The analysis of genetic control showed a gene with complete dominance, and the segregation analysis of the F3 families hypothesized the occurrence of strongly linked or pleiotropic genes. The data obtained associated to marker-assisted backcrossing allowed the tolerance introgression in sensitive inbred lines to nicosulfuron and tembotrione.Keywords: Zea mays L., inheritance, plant breeding, molecular markers.

Genetic Control of Phytoglycogen Accumulation in Maize ( Zea mays L.) 1

Crop Science ◽  
1969 ◽  
Vol 9 (6) ◽  
pp. 739-741 ◽  
Author(s):  
John E. Ayers ◽  
Roy G. Creech
Keyword(s):  
Zea Mays ◽  
Genetic Control ◽  
Zea Mays L

Hygromycin Based Selection of Transformants in a Local Inbred Line of Zea mays (L.)

2004 ◽  
Vol 7 (3) ◽  
pp. 318-323 ◽  
Author(s):  
Khurram Bashir . ◽  
Muhammad Rafiq . ◽  
Tahira Fatima . ◽  
Tayyab Husnain . ◽  
Sheikh Riazuddin .
Keyword(s):  
Zea Mays ◽  
Inbred Line ◽  
Zea Mays L ◽  
Selection Of ◽  
Selection Of Transformants

Effectiveness of predictive markers for marker assisted selection of pro-vitamin A carotenoids in medium-late maturing maize (Zea mays L.) inbred lines

2018 ◽  
Vol 79 ◽  
pp. 27-34 ◽  
Author(s):  
Sara Gebremeskel ◽  
Ana Luísa Garcia-Oliveira ◽  
Abebe Menkir ◽  
Victor Adetimirin ◽  
Melaku Gedil
Keyword(s):  
Zea Mays ◽  
Vitamin A ◽  
Marker Assisted Selection ◽  
Zea Mays L ◽  
Inbred Lines ◽  
Predictive Markers ◽  
Selection Of
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