Photosynthetic properties of elite erect leaf maize inbred lines and their contribution to seed production improvement

A hypothesis that elite erect leaf maize inbred lines are characterized by properties of an efficient photo-model and that as such are very desirable in increasing the number of plants per unit area (plant density) in the process of seed production has been confirmed in the present study. The properties of the observed elite erect leaf maize inbred lines were based on the effects and characteristics of thermal processes of delayed chlorophyll fluorescence occurring in their thylakoid membranes. The temperature dependence of the delayed chlorophyll fluorescence intensity, the Arrhenius plot for the determination of phase transitions (critical temperatures) and activation energy are the principal parameters of the thermal processes. Based on the obtained results on photosynthetic properties it was also possible to estimate the tolerance and adaptation of elite erect leaf maize inbred lines to high temperatures and drought.

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Photosynthetic properties of erect leaf maize inbred lines as the efficient photo-model in breeding and seed production

Genetika ◽

10.2298/gensr0302085r ◽

2003 ◽

Vol 35 (2) ◽

pp. 85-97 ◽

Cited By ~ 5

Author(s):

Cedomir Radenovic ◽

Milosav Babic ◽

Nenad Delic ◽

Zdravko Hojka ◽

Goran Stankovic ◽

...

Keyword(s):

Chlorophyll Fluorescence ◽

Seed Production ◽

Plant Density ◽

Thylakoid Membranes ◽

Inbred Lines ◽

Thermal Processes ◽

Critical Temperatures ◽

Maize Inbred Lines ◽

Photosynthetic Properties ◽

Erect Leaf

The initial idea of this study was a hypothesis that erect leaf maize inbred lines were characterized by properties of an efficient photo-model and that as such were very desirable in increasing the number of plants per area unit (plant density) in the process of contemporary selection and seed production. The application of a non-invasive bioluminescence-photosynthetic method, suitable for the efficiency estimation of the photo-model, verified the hypothesis. Obtained photosynthetic properties of observed erect leaf maize inbred lines were based on the effects and characteristics of thermal processes of delayed chlorophyll fluorescence occurring in their thylakoid membranes. The temperature dependence of the delayed chlorophyll fluorescence intensity phase transitions (critical temperatures) in the thylakoid membranes and activation energy are the principal parameters of the thermal processes. Based on obtained photosynthetic properties it is possible to select erect leaf maize inbred lines that are resistant and tolerant to high and very high temperatures, as well as, to drought. They could be good and efficient photo-models wherewith.

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Genetic, chemical, and physical predispositions of new maize inbred lines and hybrids with efficient photosynthesis

Zbornik Matice srpske za prirodne nauke ◽

10.2298/zmspn1223083r ◽

2012 ◽

pp. 83-100

Author(s):

Cedomir Radenovic ◽

Milomir Filipovic ◽

Milica Radosavljevic ◽

Zivota Jovanovic ◽

Zeljko Kaitovic ◽

...

Keyword(s):

Seed Production ◽

Conformational Changes ◽

Inbred Lines ◽

Grain Structure ◽

Hybrid Seed Production ◽

Critical Temperatures ◽

Maize Production ◽

Maize Hybrids ◽

Functional Changes ◽

Maize Inbred Lines

This study confirmed our hypothesis that new maize inbred lines and hybrids derived from them had a dominant property of an efficient photosynthetic model. This property is successfully used in breeding programmes, modern technologies of the seed, and commercial maize production. This statement is supported by the results displayed on the erect position of the top leaves of new maize inbred lines and photosynthetic and florescence parameters: the change of the delayed chlorophyll fluorescence intensity during its course and dynamics, the Arrhenius criterion for the determination of critical temperatures (phase transition temperatures) and the activation energies, as a measure of conformational changes in chloroplasts and the thylakoid membrane. Furthermore, a grain structure including its physical and chemical parameters of new maize inbred lines and hybrids was analysed in the present study. In addition, relevant breeding, seed production and technological traits, properties and parameters of new maize inbred lines and maize hybrids were observed in the present study. The overall presented results show that properties of new inbred lines and maize hybrids are based on the nature of conformational and functional changes that occur in their chloroplasts and thylakoid membranes, as well as, on progressive effects in modern breeding, contemporary hybrid seed production, and the commercial maize production.

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Significant biophysical and genetic properties of maize inbred lines and hybrids with erect top leaves

Zbornik Matice srpske za prirodne nauke ◽

10.2298/zmspn1019035r ◽

2010 ◽

pp. 35-53

Author(s):

Cedomir Radenovic ◽

Milomir Filipovic ◽

Mile Secanski ◽

Milica Radosavljevic ◽

Zoran Camdzija ◽

...

Keyword(s):

Inbred Lines ◽

Grain Structure ◽

Maize Breeding ◽

Critical Temperatures ◽

Functional Changes ◽

Positive Effects ◽

Maize Inbred Lines ◽

Breeding Programmes ◽

Dry Down ◽

Physical And Chemical

This study confirms the hypothesis that there are elite maize inbred lines and hybrids with erect top leaves, which have a dominant property of an efficient photosynthetic and fluorescent model that is successfully used in modern breeding programmes and the production hybrid seed and commercial maize. This statement is supported by the displayed results on the erect top leaves, the dynamics of grain dry-down during the maturation period and photosynthetic and florescence parameters: the temperature dependence of the delayed chlorophyll fluorescence intensity, the Arrhenius criterion for the determination of critical temperatures (phase transition temperatures) and the activation energies. The presented results show that properties of observed maize inbreds and their hybrids are based on the nature of conformational and functional changes that occur in their thylakoid membranes and other chemical tissues structures of grain and intact leaves, as well as, on positive effects in maize breeding. Moreover, other relevant significant breeding and seed production properties (commercial maize quality over grain structure, physical and chemical parameters) of maize inbred lines and their hybrids were analyzed in the present study.

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Actual prestigious properties of maize inbred lines: A good initial basis for the efficient development of new and yielding maize hybrids

Genetika ◽

10.2298/gensr0802121r ◽

2008 ◽

Vol 40 (2) ◽

pp. 121-133 ◽

Cited By ~ 5

Author(s):

Cedomir Radenovic ◽

Milomir Filipovic ◽

Milosav Babic ◽

Goran Stankovic ◽

Aleksandar Radojcic ◽

...

Keyword(s):

Water Status ◽

Inbred Lines ◽

Delayed Fluorescence ◽

Critical Temperatures ◽

Maturation Period ◽

Maize Hybrids ◽

Functional Changes ◽

Chemical Structures ◽

Maize Inbred Lines ◽

Dry Down

This study conforms our hypothesis that there are elite maize inbred lines, which can be considered actual and prestigious as they have not only a property of the water status and a greater grain dry down rate during the maturation period, but also a property of the efficient photosynthetic-fluorescence model that is successfully used in the contemporary processes of breeding, and thereby in the development of new and yielding maize hybrids. Presented results obtained on the dynamics of grain dry down during the maturation period and on photosynthetic-fluorescence parameters (temperature dependence of the chlorophyll delayed fluorescence intensity, the Arrhenius plot for the determination of critical temperatures, i.e. phase transition temperatures and the activation energy) show that properties of the observed inbreeds are based on effects and nature of conformational and functional changes occurring in their thylakoid membranes and other chemical structures of grain tissues. Summarized results of studies on actual and prestigious properties of maize inbreeds will contribute to more exact, rational and expeditious proceedings of contemporary processes of breeding.

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The prestigious maize inbred lines with erect top leaves: The priority performance of the efficient photosynthetic model in breeding

Genetika ◽

10.2298/gensr0901041r ◽

2009 ◽

Vol 41 (1) ◽

pp. 41-58

Author(s):

Cedomir Radenovic ◽

Milomir Filipovic ◽

Dragojlo Selakovic ◽

Mile Secanski ◽

Vojka Babic ◽

...

Keyword(s):

Plant Density ◽

Thylakoid Membranes ◽

Inbred Lines ◽

Delayed Fluorescence ◽

Non Invasive ◽

Maize Inbred Lines ◽

Dry Down ◽

Area Unit ◽

Unit Plant

This study conforms the hypothesis that there are elite maize inbred lines with erect top leaves that have a property of an efficient photosynthetic model and that as such are successfully used in the processes of breeding in which the number of plants is increased per area unit (plant density). This proof was established by the application of non- invasive photosynthetic-fluorescence method suitable for the evaluation of the efficiency of the photosynthetic model. The obtained photosynthetic and fluorescence properties of observed prestigious maize inbred lines with the erect top leaves are based on the effects and the nature of changes in chlorophyll fluorescence occurring in their thylakoid membranes. Their principal parameters are temperature dependence of the chlorophyll delayed fluorescence intensity, the Arrhenius plot for the determination of the phase transition in thylakoid membranes and the estimated activation energies. The displayed results on the size of an angle between the direction of the propagation of the above-ear leaf and the direction of the stalk propagation, as well as, results on the dynamics of grain dry-down during the maturation period, additionally indicate that traits of observed maize inbred lines with erect top leaves are the prominent base for more exact, rational and faster proceeding of current processes of breeding.

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Genotype by Trait Associations among Drought Tolerant Maize Inbred Lines

Journal of Agricultural Science ◽

10.5539/jas.v9n12p21 ◽

2017 ◽

Vol 9 (12) ◽

pp. 21

Author(s):

Cousin Musvosvi ◽

Mruthunjaya C. Wali

Keyword(s):

Grain Yield ◽

Seed Production ◽

Inbred Lines ◽

High Productivity ◽

Lattice Design ◽

Cultivar Development ◽

Drought Tolerant ◽

Maize Inbred Lines ◽

Using Data ◽

Trait Associations

Twelve tropical, yellow maize inbred lines identified as drought tolerant were evaluated in multi environments, including managed drought, rain fed and irrigated conditions. The objective was to study genotype-trait associations across environments. A 3 × 4 a-lattice design with two replications was used in each environment. Data were recorded for twenty-one traits. Combined analysis of variance using data from all environments was done for all traits using the GLM procedure in SAS version 9.3. Genotype by trait associations were revealed using the genotype main effect plus genotype-by-environment biplot model in GENSTAT 14th Edition. Inbred lines which were associated with high grain yield and related desirable traits such as a low drought susceptibility index under managed drought were DMR-M-81, DMR-M-88, FA6, GPM36 and M39. Across the diverse environments, DMR-M-84, DMR-M-88, FA6 and GPM36 were associated with grain yield and/or its related traits. The inbred lines associated with desirable traits could be evaluated for combining ability in order to know their desirability in cultivar development. These inbred lines could be used as female parents in seed production programmes since high productivity and drought tolerance are important qualities of female parents in seed production.

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