Meghalaya, India
Meghalaya, India

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Singh A.,ICAR RC NEH Region | Singh B.K.,Mizoram Center | Brajendra,Directorate of Rice Research | Nath A.,ICAR RC NEH Region | Deka B.C.,ICAR RC NEH Region
Journal of Horticultural Science and Biotechnology | Year: 2010

Strawberry (Fragaria × ananassa Duch.) is a rich source of minerals, vitamins, and anti-oxidants, and has a unique flavour and aroma. However, there is little information on the genetic variability and inheritance of mineral elements in strawberry.This is important as it can influence the selection of better genotypes and suitable breeding approaches for improvements in the nutritional quality of fruit.The objectives of the present study were, therefore, to estimate the variability, inheritance, and inter-relationships of mineral elements, to identify mineral-rich and productive genotypes, and to suggest suitable breeding approaches. A significant genotypic mean square for all the minerals studied indicated sufficient variation among genotypes. Our results also indicated that the effect of genotype on the mineral content of fruit was stronger than that of environment. Six genotypes, namely 'Ofra', 'Sweet Charlie', 'Elista', 'Festival', 'Camarosa', and 'Douglas' were found to have higher mineral contents as well as better fruit yields, and therefore could be useful in further breeding programmes. N, K, Ca, Mg, Fe, Mn, Zn, and Cu contents, together with fruit yield, could be improved by selection and hybridisation as these traits showed high heritability (> 80%) and high genetic advance as a percentage of the mean (> 40%), while recurrent selection was suitable for increasing P contents, which showed moderate heritability (> 79.81%) and low genetic advance as a percentage of the mean (> 33.86%). Moreover, Mg and N contents could be used as reliable tools with which to identify the most productive and mineral-rich genotypes, as indicated by correlation and path analysis. Studies on such genetic estimates will increase our understanding of the inheritance of mineral contents and affect the design of crop improvement strategies.

Singh A.,ICAR RC NEH Region | Singh B.K.,Mizoram Center | Deka B.C.,ICAR RC NEH Region | Sanwal S.K.,ICAR RC NEH Region | And 2 more authors.
Scientia Horticulturae | Year: 2011

Strawberry (Fragaria×ananassa Duch.) is rich source of dietary antioxidants, minerals and nutrients. Dietary antioxidants have been known as beneficial for enhancing the fitness, preventing certain diseases and even mitigating the effects of ageing. The objectives of the present study were to determine variability and inheritance of antioxidants, to identify antioxidant rich and productive genotypes, and to suggest suitable breeding approaches. The genotypes, namely Ofra, Chandler, Festival and Camarosa showed higher concentrations of dietary antioxidants and therefore could be useful in future breeding. Results indicate that the effect of the genotypes on antioxidant contents is stronger than that of the environment. The high heritability (>80%) and low genetic advance as percentage of mean (<40%) for ascorbic acid and β-carotene contents could be improved by heterosis breeding. However, selection and hybridization would be effective tools to enhance the phenols and anthocyanin content, and yield potential as these traits showed high heritability (>80%) and high genetic advance as percentage of mean (>40%). Positive direct effect on fruit yield was highest for phenol content (0.609) which is also fairly close to its correlation coefficient (0.765) indicating that a direct selection based on phenol content would be most effective and that the phenol content could be used as a reliable biochemical marker to identify the productive genotypes having higher amounts of dietary antioxidants. The information could also be used for developing antioxidant rich cultivars, i.e. 'Breeding Strawberry for High Antioxidants'. © 2011 Elsevier B.V.

Singh B.K.,Mizoram Center | Singh B.K.,Indian Institute of Vegetable Research | Ramakrishna Y.,Mizoram Center | Ngachan S.V.,ICAR RC NEH Region
Genetic Resources and Crop Evolution | Year: 2014

Spiny coriander (Eryngium foetidum L.) is a leafy spice herb of tropical regions of world (America, South Asia, Pacific Islands, South Europe and Africa) which is used extensively for garnishing, marinating, flavouring and seasoning of foods. It is also used as an ethno-medicinal plant for the treatment of a number of ailments such as fevers, chills, vomiting, burns, fevers, hypertension, headache, earache, stomachache, asthma, arthritis, snake bites, scorpion stings, diarrhea, malaria and epilepsy. The main constituent of essential oil of the plant is eryngial (E-2-dodecenal). However, a significant variation in the plant morphology, composition of essential oil (>60 constituents reported) and secondary metabolites resulted from genetic variability and geographic location. Pharmacological investigations have demonstrated anthelmintic, anti-inflammatory, analgesic, anti-convulsant, anti-clastogenic, anti-carcinogenic, anti-diabetic and anti-bacterial activity. Focus on holistic research approaches such as genetic enhancement to develop high yielding varieties (collection, conservation, evaluation, breeding and development of potential genotypes); efficient production technologies to harvest the plants in mass (cultivation under 50-75 % shed-net and spray of gibberellic acid at a concentration of 100 ppm); post-harvest management to minimize marketing loss; and medicinal/pharmaceutical investigations would be the best strategies to increase the yield and to promote industrial uses of E. foetidum as an economically relevant crop. © 2014 Springer Science+Business Media Dordrecht.

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