V.P P Sobhakumari

• Ph.D
• Principal Investigator at Sugarcane Breeding Institute

Erianthus arundinaceus, one of the species of ‘Saccharum complex’ has a number of important agronomic traits including good ratooning ability, tolerance to both drought and waterlogging, disease resistance and vigor and is of interest as a potential source of parental germplasm to sugarcane breeders. We report here for the first time the chromosome...

Erianthus arundinaceus, one of the species of ‘ Saccharum complex’ has a number of important agronomic traits including good ratooning ability, tolerance to both drought and waterlogging, disease resistance and vigor and is of interest as a potential source of parental germplasm to sugarcane breeders. We report here for the first time the chromosom...

Saccharum spontaneum, the wild species of sugarcane, is an important germplasm resource with exceptional properties of pest and disease resistance and stress tolerance. Chromosomal diversity and its evolutionary dynamics in this species have been revealed through the study of 88 clones collected from the states of Punjab and Haryana, India. Twelve...

Erianthus is a wild related genus of sugarcane. Its introgression is expected to impart better bio-mass production, multi ratoonability, and disease and pest resistance to the sugarcane cultivars. In this study, the introgression pattern of the wild genome, E. procerus, has been analyzed in the three consecutive generations. The field performance c...

Saccharum officinarum is a perennial grass and mainly used for cultivation of juice and its biofuel production. Erianthus, a wild genera of sugarcane grouped under 'Saccharum complex' is considered for its potential genetic resources includes high biomass production, multi ratooning ability, resistance to major diseases and pests and tolerance to a...

Erianthus is a wild related genus of sugarcane. Its introgression is expected to impart better biomass production, multi ratoonability, and disease and pest resistance to the sugarcane cultivars. In this study, the introgression pattern of the wild genome, E. procerus, has been analyzed in the three consecutive generations. The field performance co...

Saccharum spontaneum, the wild species of sugarcane, is an important germplasm resource with exceptional properties of pest and disease resistance and stress tolerance. Chromosomal diversity and its evolutionary dynamics in this species have been revealed through the study of 88 clones collected from the states of Punjab and Haryana, India. Twelve...

Tissue culture plants were developed from a rare non flowering hybrid of Saccharum officinarum (Vellai,2n=80) x Zea mays (Golden Beauty 2n= 20+2B). Flowering was induced and the cytogenetic studies revealed that the number of chromosomes varies in root tip cells of the tissue cultured plants form 2n=52-56. The increase in chromosome number was due...

Erianthus arundinaceus, a wild relative of sugarcane, has great potential as a germplasm source to contribute valuable traits to sugarcane including better ratoonability, vigour and adaptation to biotic and abiotic stresses. Many unsuccessful attempts have been made to introduce the desirable characters from this wild species to modern sugarcane cu...

The present review highlight some of the developments in the field of in vitro culture induced variations that are evolving in the recent years as novel strategies for use in sugarcane improvement. Tissue culture, a routine technique covering a variety of branches has been widely involved in crop improvement especially by inducing genetic changes o...

Microsporogenesis was analyzed in a rare intergeneric hybrid of sugarcane produced from a SorghumxSaccharum cross. The original hybrid was found to be non-flowering. Some of the somaclones of this hybrid obtained by irradiating the callus at four Kr showed flowering. However, the somaclones were found to be male sterile. Here we report the occurren...

Thirty-one clones of Saccharum officinarum, collected from New Guinea, were analysed and the somatic chromosome number was determined. Of the 31 clones, 29 showed 2n = 80 (typical clones), while two clones, NG 77-56 and NG 77-26, were atypical with 2n = 116 and 70 respectively. Chromosome number was determined for 62 clones of S. spontaneum, availa...

The influence of hybrid vigor on callus induction, culture efficiency, callus weight, regeneration capacity of the callus and number of regenerated plants from callus culture of sugarcane was studied. For the study a total of 6 parents (clones of S. officinarum and S. spontaneum) and 12 Fl hybrids were used. The statistical analysis of the results...

A rare hybrid of Sorghum x Sugarcane was produced at Sugarcane Breeding Institute during 1996 which had a chromosome number 2n=66. This hybrid lacked vigor and was poor with respect to agronomic traits. Attempts were made to create genetic variation in this hybrid through tissue culture and colchicine treatment. Calli induction and their differenti...

A reliable and highly efficient system of transforming shoot tips mediated by Agrobacterium tumefacience was developed in Capsicum. Various aspects of transformation were examined in efforts to improve the efficiency of producing transformants. Agrobacterium tumefacience strain EHA 105 harboring the pIG121 Hm plasmid containing β-glucuronidase (GUS...

The calli of a Sorghum bicolorxSaccharum officinarum hybrid was irradiated at different doses of gamma radiation to induce normal flowering and panicle emergence in this hybrid. Fifty one somaclones were regenerated from the irradiated calli and field planted during May, 2004. One of the somaclones (SSS-03/152) flowered during November, 2004 produc...

Different explants of three cultivars of Capsicum annuum (K1, K2 and PLR 1) were tested for their regeneration response. Shoot tip explants were co cultivated with Agrobacterium strain EHA 105 carrying a T-DNA with CaMV 35S promoter - gus marker gene from which β - glucuronidase (GUS) is expressed only in plants. Growth of the Agrobacterium was inh...

Shoot tip culture, callus culture and plant regeneration were achieved in different varieties of sugarcane. The microbial inoculantsGluconacetobacter sp andAzospirillum sp were tested for their efficiency in shoot bud multiplication and elongation. The calli were induced and regeneration efficiency was tested with the microbes. The growth media wer...

Studies on cytomorphological, yield and quality characters of 30 clones belonging to an intergeneric hybrid ofSaccharum, Co 7201 x (28 NG 210 xErianthus), have revealed the existence of significant correlation between the chromosome number and the expression of the characters. In the population a wide range of variability was obtained with chromoso...

A method is standardized for the in vitro plant regeneration from shoot tip cultures of Capsicum annuum L., cultivar PLR-1. Axillary shoots from shoot tip explants of 3 weeks old in vitro cultured seedlings could be stimulated to undergo multiple shoot formation (20.3±0.36) on Murashige & Skoog's medium (1962) supplemented with 6.0mgl-1 6-benzylade...