Nirmal Kumar S.,Central Sericultural Research and Training Institute
Indian Silk | Year: 2011
S. Nirmal Kumar states that significant progress were made and challenges faced in developing better silkworm breeds by CSRTI, Mysore, India . The research undertaken to develop new breeds with unique traits, such as artificial diet, thin denier, sericin rich, large filament, and sex-limited hybrids had great potential of application in newer areas. The introduction of NN6D and The introduction of NN6D and systematic breeding approaches by 1970s, which resulted in evolving which resulted in evolving bivoltine breeds NB4D2, NB18, and NB7. The development of new rearing technology made the rearing of bivoltine breeds possible and these rearing of bivoltine breeds resulted in a linear improvement of cocoon yield and quality of multivoltine hybrids. The institute initiated breeding programs in the 1980s to evolve multivoltine breeds with shorter larval duration, high silk content, disease tolerance, and better silk quality and higher yield.
Dayakar Yadav B.R.,Central Sericultural Research and Training Institute
Indian Silk | Year: 2011
CSRTI, Mysore, India, made significant efforts to improve productivity of mulberry in traditional areas and under stress conditions. Mulberry was used as the only feed for Bombyx mon silkworm and had significant contribution in cocoon production in the country. The program for mulberry improvement in the country started in early 1960s when several high yielding mulberry varieties were evolved through conventional, polyploidy, and backcrossing materials. The major contributions came from CSRTIs at Berhampore and Mysore. The mulberry varieties selected from the morphological traits showed considerable variations and varieties, such as Mysore Local, Bilidevalaya, and Kajali had lobed leaves, while V-1 and RFS-175 had unlobed leaves. The yield potential of V-1 and S36 were significantly higher than that of local varieties.
Qadri S.M.H.,Central Sericultural Research and Training Institute
Indian Silk | Year: 2011
Significant research and development (R&D) efforts at CSRTI, Mysore, India, played a key role in evolving high yielding mulberry varieties for stress conditions, silkworm breeds and hybrids, practices for cultivation, and rearing, disease management supported with mechanization in different activities besides engineering genetic characteristics for improving quality parameters. These R&D efforts at the institute led to significant achievement in production and helped in sustaining the industry despite several challenges. Kanva-2 or M5 was the first improved mulberry variety released by the institute during 1970s, which was an open pollinated hybrid variety selected from Mysore Local yielded about 30-35 MT/ha per year. This was followed by MR2, a powdery mildew resistant variety, which gained popularity in Tamil Nadu. The breeding efforts at the institute also achieved improvement in the nutritive quality of leaves apart from higher leaf yield.
Geetha G.S.,Central Sericultural Research and Training Institute
Indian Journal of Sericulture | Year: 2011
Participation of women in sericulture is as old as sericulture industry. Women and sericulture are two sides of same coin. Though her participation is more than 60%, her socio economic status remains low, disempowered and continues to be sidelined in the matter of empowerment. Women's participation and their empowerment often are hindered by may a factors. The main barriers could be caste system, poverty, low educational status, limited work opportunities, low income, lack of assets and access to credit. Understanding these constraints is a must to plan an agenda for women's participation in sericulture activities. Hence the study was formulated with the main objective to identify the factors which act as constraints for women's participation and involvement in sericulture activities. The findings of the study carried out in Mandya district of Karnataka indicate combination of factors that are responsible for women participation in sericulture. Landlessness, inadequateaccess to credit, no separate rearing house, lack of technological knowhow, lack of family labour, unaffordable lease amount on mulberry garden, land located at distances, non-profitable activity, health problems, lack of sericulture inputs etc, are the ruling factors influencing women's participation and involvement in sericulture. The concerned has to take initiative to address these factors, if women are to be induced to participate, involve and empowered. Changes must be brought about in social norms, traditions and ideologies. Social transformation must be brought out in women's agency through increased access to resources backed with institutional change and a bottom up approach.
Maji M.D.,Central Sericultural Research and Training Institute
Archives of Phytopathology and Plant Protection | Year: 2011
The disease response and magnitude of genetic variability of 85 mulberry genotypes of different agroclimatic origin was studied against powdery mildew caused by Phyllactinia corylea. It was observed that there was a wide variation of disease severity among the test genotypes. Australian and France originating genotypes were found to be highly resistant to mildew followed by of Thai and Italian origin. Genotype wise, the lowest mildew disease severity was recorded in Thailand [lobed]) followed by M. malticaulis, M. australis and Italian. Genetic analysis of disease severity revealed that the estimate of phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) were high and that PCV was greater than GCV. High estimate of heritability coupled with high genetic advance showed that the mildew disease resistant trait is governed by an additive gene action. Hence the highly resistant mulberry genotypes identified may be exploited through hybridisation followed by selection under epiphytotic conditions for the improvement of disease resistant traits in mulberry. © 2011 Taylor & Francis.