Browsing by Author "Suresh Babu, K V"

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Chloroplast as an indicator for identification of polyploidy in abelmoschus
(Kerala Agricultural University, 1989) Suresh Babu, K V; Dutta, O P
Chromosome polymorphism in okra
(Kerala Agricultural University, 1994) Suresh Babu, K V; Dutta, O P
Meiotic study was made on nine okra lines (Abelnioschus esciilentuf [L] Moench.) resistant to yellow vein mosaic virus (YVMV), evolved by introgressing the resistant genes from A. tetnphyllus (L.) Medic. The chromosome number of the lines varied from 2n = 120 to 144. All the lines showed regular meiosis. The study confirmed the complex polyploidy in A. esculent us which can sustain a considerable number of additions and deletions of chromosomes.
Cytogenetic studies of the F1 hybrid Abelmoschus esculentus X A, tetraphyllus and its amphidiploid
(Kerala Agricultural University, 1990) Suresh Babu, K V; Dutta, O P
The FI hybrids, (A.esculentus x A. tetraphyllus resembled the wild parent and exhibited hybrid vigour. Its meiosis was abnormal snowing more of univalents and less of bivalents and was completely sterile. The amphidiploid (A. csculentus-tctraphyllus) obtained through colchicine treatment was fully fertile. It showed a low multivalent formation during meiosis and can survive as a new synthetic species. The practical value of the amphidiploid in okra breeding has been indicated.
Evaluation and molecular characterization of advanced generation distant hybridization selections of okra (Abelmoschus esculentus (L) Monech)
(Department of Olericulture, College of Horticulture, Vellanikkara, 2015) Arunkumar, B; Suresh Babu, K V
Evaluation of diploids and polyploids of ivy gourd (Cocinia grandis [L.] Voight)
(Department of Olericulture, College of Horticulture, Vellanikkara, 1999) Shinu Joseph; Suresh Babu, K V
Evaluation of F1 hybrids of okra (Abelmoschus Esculentus [L.] Moench)
(Kerala Agricultural University, 1994) Suresh Babu, K V; Prasanna, K P; Rajan, S
Evaluation of promising distant hybridization derivatives of okra (A.esculentus(L.) Moench)
(Department of Olericulture, College of Horticulture, Vellanikkara, 2012) Yamuna, Mogili; Suresh Babu, K V
Field testing of leucaena germplasm for their relative susceptibility to infestation by the Psyllids
(Kerala Agricultural University, 1992) Suresh Babu, K V; Mohankumar, B; Thomas Mathew
Genetic improvement and cytogenetical studies in thamaravenda [Abelmoschus manihot (L.)]
(Department of Olericulture, College of Horticulture, Vellanikkara, 1996) Reena Susan Chacko; Suresh Babu, K V
Genetic variability in Abelmoschus caillei L.
(Kerala Agricultural University, 1999) Reena Susan Chacko; Suresh Babu, K V; Rajan, S; Krishnan, S
Studios on parameters of variability, correlation and path coefficient analysis of fruit yield in Abelmoschus caillei L- revealed that characters such as number of branches per plant, number of nodes per plant, plant height and fruit length had maximum coefficient of variation. Higher values of heritahility anil genetic advance were simultaneously estimated for fruit yield per plant and fruits per plant. Yield per plant had hiph positive significant correlation with fruits per plant, fruit length, fruit weight, plant height and number of intemodes on main stem. Path analysis revealed positive direct effect on fruit yield per plant through fruits per plant followed by plant height,
Histochemical studies on micro and megasporogenesis in the interspecific F1 hybrid of Abelmoschus Esculentus x A. Tetraphyllus
(Kerala Agricultural University, 1992) Suresh Babu, K V; Dutta, O P
In the interspecific hybrid between Abelmoschus csculentus and A. tetraphyllus the developmental stages of male gamete were abnormal. Pollen mother cells underwent normal meiosis and restitution division. The restitution division gave raise to fertile pollen grains. The developmental stages of female gamete were not complete. The study revealed the degeneration of megaspores of the linear tetrad and thus formation of empty ovules. The megaspore tetrads were low in nucleic acids and protein. The sterility of the interspecific hybrid is attributed to break down of entire megaspores.
Identification of promising segregants in F4 and F5 generations of the cross abelmoschus caillel [A. Cher]Steveis x A.esculentus (L.) Moench
(Department of Olericulture, College of Horticulture, Vellanikkara, 2008) Jaseena, P; Suresh Babu, K V
Introgression of yellow vein mosaic virus resistance from Abelmoschus caillei (A.Cher) steveis into A. escuientus (L.) Moench.
(Department Of Olericulture, College Of Horticulture, Vellanikkara, 2005) Kousalya, V; Suresh Babu, K V
The present investigation on “Introgression of Yellow Vein Mosaic Virus resistance from A.caillei (A. Cher.) Steveis into A.esculentus (L.) Moench” was conducted at the Department of Olericulture, College of Horticulture, KAU, Vellanikkara, Thrissur during 2003 to 2004. The major objective of this study was to transfer YVMV resistance from A.caillei variety Susthira to popular but highly susceptible variety Salkeerthi (A.esculentus). The study was aimed at finding the chromosome affinity between two species involved in interspecific hybridisation. Biochemical characterization based on activity of peroxidase, polyphenol oxidase and protein content, protein banding pattern in parental species and its derivatives. A.caillei variety Susthira and A.esculentus variety Salkeerthi were crossed reciprocally and crossability index between the species was worked out. It was found that crossing between the species was more successful when A.caillei was used as female parent. The interspecific F1 seeds obtained were used to raise the F2 generation. The parental species, interspecific F1 hybrids and F2 generation were subjected to detailed testing programmes for reaction to YVMV. A.caillei and F2 generation were highly resistant to YVMV. Whereas A.esculentus and F1 generation plants were susceptible to YVMV. The F2 generation plants were morphologically more similar to semi wild parent A.caillei. However, three F2 selections viz.,F2-2, F2-4, F2-6 having more fruit length and desirable number of ridges per fruit could be selected. These selections showed considerably good amount of pollen fertility and seed set. So these selections can be further advanced and stabilized with desirable agronomic traits like fruit characters can be selected in future. The cytological study showed that the chromosome number of A.esculentus and A.caillei as 2n = 130 and 2n =184 respectively. In the interspecific F1 hybrid (A.caillei x A.essculentus) mostly 65 bivalents could be observed suggesting a good amount of affinity between the genome of two species. Biochemical analysis on activity of peroxidase, polyphenol oxidase and protein estimation, protein banding pattern in relation to YVMV resistance in the parental species, F1 hybrids and F2 generation was carried out. The genotype A.esculentus showed maximum YVMV infection of (C.I. 70.7) in the field screening studies, in which low peroxidase activity (58.94 units/g/min.) and polyphenol oxidase (14.1 units/g/min.) supporting with low protein content of 9.8 mg/g of seed. A.esculentus showed only one protein band of Rm = 0.788 which was common for all genotypes studied. It implies that the resistant factor acquired in A.caillei as well as F2 has no place in the susceptible species A.esculentus. A.caillei with high peroxidase, polyphenol oxidase and high protein content (15 mg/g of seed), additional protein band (Rm value = 0.211) influenced on resistance to YVMV. The disease incidence in F1 plants showed symptom at 35 days after sowing the symptom of YVMV disappeared at the stage of maturity in F1 which was clearly indicated by one additional protein band (Rm value = 0.322). This protein band (Rm value = 0.322) which may be performing the function of the resistance/ tolerance of the resistant species and F2 plants in which the protein banding was expressed (Rm value = 0.211). The disease infection in the early stage may be due to the cumulative action of low peroxidase, low polyphenol oxidase and low protein (11.8 mg/g of seed) which was lower than resistant parents.F2 generation plants were free from symptom of YVMV infection which may be influenced by high peroxidase, high polyphenol oxidase and high protein content, additional protein band (Rm value = 0.211). Which was similar to that of resistant parent A. caillei and indicated that semi-wild parental resistant character was expressed in the F2 generation.
Phenotypic stability analysis in bhindi (Abelmoschus esculentus (L.) Moench.)
(Department of Olericulture,College of Horticulture, Vellanikkara, 1981) Suresh Babu, K V; Gopalakrishnan, P K
Twenty five genotypes of bhindi were grown continuously in two seasons under two contrasting environments in a randomised block design. Observations were recorded on yield and its seven components. Significant variation among the genotypes with respect to these characters were observed.