ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Electronic Resource

The mechanism and inheritance of intraflower self-pollination in self-pollinating variant strains of periwinkle (2001)

Kulkarni, R. N. ; Sreevalli, Y. ; Baskaran, K. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 120 (2001), S. 0

add to mindlist on the mindlist

Details

ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: The mechanism and inheritance of intraflower self-pollination in self-pollinating variant strains of periwinkle was studied using three self-pollinating and two non-self-pollinating but fully self-fertile strains. Intraflower self-pollination in self-pollinating strains occurred due to the continued growth of the gynoecium beyond the base of the anthers, even after anthesis, resulting in intraflower self-pollination. In non-self-pollinating strains, the stigma remained below the base of the anthers and did not come into contact with the pollen up to flower drop. Intraflower self-pollination was found to be governed by duplicate recessive genes. The utility of the intraflower self-pollination trait in the breeding of periwinkle cultivars is discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1439-0523.2001.00609.x

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

2

Electronic Resource

Five cycles of recurrent selection for increased essential oil content in East Indian lemongrass: response to selection, and effects on heritabilities of traits and intertrait correlations (2003)

Kulkarni, R. N. ; Baskaran, K. ; Ramesh, S.

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 122 (2003), S. 0

add to mindlist on the mindlist

Details

ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Five cycles of phenotypic recurrent selection for increased essential oil content were carried out in East Indian lemongrass, Cymbopogon flexuosus. In each cycle, the top 5% of plants for essential oil content were selected and their ramets were planted in isolated polycross blocks to produce the seed of the next cycle. Response to selection for essential oil content and its effect on three unselected traits, leaf yield, dry matter content in leaves and citral content in the essential oil, were determined by evaluating C0-C5 populations in a replicated trial. Genetic variation, heritability estimates and intertrait correlations for essential oil content, leaf yield, leaf width, tiller number and citral content in the essential oil in C4 were determined, by evaluating 40 clones and their half-sib progenies produced from 40 randomly selected C4 plants, in a replicated experiment. These were compared with those determined in C0 earlier. The mean essential oil content increased from 0.66% in C0 to 1.67% in C5 (i.e. by about 31% per cycle over C0). Selection for essential oil content did not affect leaf yield and its effect on dry matter content in leaves was marginal. The first three cycles of selection for essential oil content did not affect citral content in the oil but two further cycles significantly decreased citral content. Heritabilities and intertrait correlations between all traits studied, except citral content and essential oil content, were similar to those found in C0.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1439-0523.2003.00785.x

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

3

Electronic Resource

Inheritance of morphological traits of periwinkle mutants with modified contents and yields of leaf and root alkaloids (1999)

Kulkarni, R. N. ; Baskaran, K. ; Chandrashekara, R. S. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 118 (1999), S. 0

add to mindlist on the mindlist

Details

ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Periwinkle Catharanthus roseus is a medicinally important plant producing anticancer and antihypertension alkaloids. Two mutants, one dwarf and one semidwarf and both, with a high alkaloid content in the roots and one mutant with a wavy leaf margin and a high alkaloid content in its leaves were obtained after induced chemical mutagenesis with ethyl methane sulphonate and N-nitroso-N-ethylurea in the variety ‘Nirmal’, which is resistant to dieback disease. These mutants were evaluated in the M3 and M4 generations. The dwarf and semidwarf mutants differed from the parental variety for many morphological characters, while the mutant with the wavy leaf margin differed mainly in leaf size and leaf thickness. Although both dwarf and semidwarf mutants showed a significantly higher alkaloid content in their roots in both generations, only the semidwarf mutant gave a significantly higher (23%) root alkaloid yield than the parental variety. The mutant with the wavy leaf margin showed a significantly higher alkaloid content in the leaves in both the M3 and M4 generations and also had a significantly higher (21%) leaf alkaloid yield than the parental variety. All three mutants were found to be controlled by monogenic recessive genes; the genes for ‘dwarfness’ and ‘semidwarfness’ were allelic to each other, with the allele for semidwarfness being dominant over the allele for dwarfness. The gene for the wavy leaf margin was inherited independently of the genes for dwarfness and semidwarfness.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1439-0523.1999.118001071.x

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

4

Electronic Resource

Inheritance of resistance to Pythium dieback in the medicinal plant periwinkle (2003)

Kulkarni, R. N. ; Baskaran, K.

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 122 (2003), S. 0

add to mindlist on the mindlist

Details

ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Inheritance of resistance to dieback, caused by Pythium aphanider-matum, in periwinkle (Catharanthus roseus) was studied using a dieback-resistant dwarf mutant, Dw, with a green stem, and a susceptible accession, OR, with a purple stem. Plants of parental F1, F2 and backcross generations were evaluated for resistance to dieback in a randomized complete block design with four replications, in a field plot that had been continuously planted with periwinkle in previous years and where dieback severity was high. Resistance to dieback was evaluated on two dates, i.e. when distinct differences between plants of the parental strains were noticed. From both quantitative and qualitative analyses of data, resistance to dieback appeared to be governed by a single gene (with a broad-sense heritability of 0.85 and 0.79, depending on the date of evaluation), and was inherited independently of genes governing dwarfness and stem pigmentation.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1439-0523.2003.00837.x

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

5

Electronic Resource

Studies on the utilization of single cell protein by the silkworm Bombyx mori (1984)

Mathavan, S. ; Baskaran, K. ; Sironmani, Anitha ; [et al.]

Springer

Entomologia experimentalis et applicata 36 (1984), S. 61-68

add to mindlist on the mindlist

Details

ISSN: 1570-7458

Keywords: Bombyx mori ; silkworm ; algae ; single cell protein ; consumption ; utilization

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Description / Table of Contents: Résumé Des chenilles du dernier stade de Bombyx mori, alimentées sur mûrier additionné de Spirulina fusiformis comme source de protéine de cellule isolée (SCP), atteignent en 6 jours le poids larvaire maximum de 2090 mg; les chenilles témoins consommaient pendant 9 jours pour obtenir leur poids larvaire final de 1470 mg. Les quantités consommées, les coefficients d'assimilation et de conversion ont augmenté substantiellement chez les chenilles avec SCP. Des augmentations significatives de critères économiques, comme les poids de cocon, de nymphe et de cogul, ont été observées avec l'addition de SCP par rapport aux témoins. Environ 15% du S. fusiformis marqué a été incorporé directement dans les tissus larvaires. La présence de SCP dans l'intestin a permis une meilleure conversion des protéines foliaires consommées.

Notes: Abstract Final-instar larvae of Bombyx mori fed mulberry leaves, supplemented with Spirulina fusiformis (Woronichin) as a source of single cell protein (SCP), required 6 days to attain a maximum larval weight of 2090 mg; control group larvae needed 9 days to attain a final larval weight of 1470 mg. Quantity of feeding, assimilation and conversion efficiencies increased substantially in the SCP-fed group. Significant improvements in the economic characters such as cocoon, pupal, and shell weights were obtained in the SCP supplemented larvae in comparison to the normal leaf fed larvae. About 15% of the labelled S. fusiformis was directly incorporated into larval tissue. Presence of SCP in the gut facilitated better conversion of consumed leaf protein.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00345206

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

6

Unknown

Effect of friction factor on barrelling in elliptical shaped billets during cold upset forging (2007)

Baskaran, K. ; Narayanasamy, R. ; Arunachalam, S.

Springer

In: Journal of Materials Science. 2007; 42(18): 7630-7637. Published 2007 Sep 01. doi: 10.1007/s10853-007-1900-7.

add to mindlist on the mindlist

Details

Publication Date: 2007-09-01

Print ISSN: 0022-2461

Electronic ISSN: 1573-4803

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics

Published by Springer

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

PAPER CURRENT

S·F·X

Fulltext

7

Unknown

Understanding the fabric of protein crystals: computational classification of biological interfaces and crystal contacts (2016)

Capitani, G., Duarte, J. M., Baskaran, K., Bliven, S., Somody, J. C.

Oxford University Press

In: Bioinformatics

add to mindlist on the mindlist

Details

Publication Date: 2016-02-06

Description: Modern structural biology still draws the vast majority of information from crystallography, a technique where the objects being investigated are embedded in a crystal lattice. Given the complexity and variety of those objects, it becomes fundamental to computationally assess which of the interfaces in the lattice are biologically relevant and which are simply crystal contacts. Since the mid-1990s, several approaches have been applied to obtain high-accuracy classification of crystal contacts and biological protein–protein interfaces. This review provides an overview of the concepts and main approaches to protein interface classification: thermodynamic estimation of interface stability, evolutionary approaches based on conservation of interface residues, and co-occurrence of the interface across different crystal forms. Among the three categories, evolutionary approaches offer the strongest promise for improvement, thanks to the incessant growth in sequence knowledge. Importantly, protein interface classification algorithms can also be used on multimeric structures obtained using other high-resolution techniques or for protein assembly design or validation purposes. A key issue linked to protein interface classification is the identification of the biological assembly of a crystal structure and the analysis of its symmetry. Here, we highlight the most important concepts and problems to be overcome in assembly prediction. Over the next few years, tools and concepts of interface classification will probably become more frequently used and integrated in several areas of structural biology and structural bioinformatics. Among the main challenges for the future are better addressing of weak interfaces and the application of interface classification concepts to prediction problems like protein–protein docking. Supplementary information : Supplementary data are available at Bioinformatics online. Contact: guido.capitani@psi.ch

Print ISSN: 1367-4803

Electronic ISSN: 1460-2059

Topics: Biology , Computer Science , Medicine