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Articles by R. Manohar Reddy
Total Records ( 3 ) for R. Manohar Reddy
  R. Manohar Reddy , Suresh Rai , A.K. Srivastava , P.K. Kar , M.K. Sinha and B.C. Prasad
  Assorted F1 hybrids and reciprocals of divergent tasar ecoraces of Antheraea mylitta viz., Daba, Jata and Raily were evaluated for relative heterosis. The DabaxJata [R] (random female and male) and its reciprocal hybrids have recorded high positive heterosis for fecundity (+17.45 and +1.70%), egg fertility (+11.58 and +7.20%), shell weight (+34.76 and +27.44%), silk ratio (+30.49 and +24.15%) and silk yields (+94.33 and +82.51%), respectively. Dabax Jata [PxS] (high pupal female and high shell male) hybrid, although recorded positive heterosis for all traits, but was next to random parental hybrids. The DabaxJata [PxP] (high pupal female and high pupal male) combination and its reciprocal have shown positive heterosis only for fecundity (+22.13 and +35.89%), while DabaxJata [SxS] (high shell female and high shell male) hybrid and its reciprocal are positive in shell weight (+45.12 and +33.54%) and silk ratios (+26.95 and 27.95%). All hybrids of DabaxRaily including reciprocals have shown negative heterosis for fecundity and silk yields. However, DabaxRaily [R], [SxS], [PxS] hybrids and their reciprocals have shown uneven positive heterosis for egg fertility (+1.65 to +20.74%), shell weight (+7.56 to +56.98%) and silk ratios (+1.02 to +54%). In general, all reciprocal F1 hybrids of Daba, Jata and Raily ecoraces have shown lesser heterosis. The dissimilar performance of assorted F1 hybrids and reciprocals of Daba, Jata and Raily ecoraces reveal their varied potential on relative heterosis. However, the study infers commercial prospective and optimal seed cocoon expediency in Daba and Jata ecoraces as F1 hybrids [R] and reciprocals. While, the trait specific positive heterosis in high pupal and high shell hybrids (assorted F1 hybrids) have application in segregating lines with desired traits and aggregating them in to needy one(s).
  R. Manohar Reddy , M.K. Sinha and B.C. Prasad
  In spite of huge availability of nature grown tropical tasar silkworm food plants and rural tribal man power, the tasarculture and raw silk production is yet to attain the potential. The reason being the inadequacy of prospective commercial silkworm seed and breed options, and the urgent need is a coherent application of existing parental races by effective selection. The global demand for vanya silks in general and tasar silk in particular, call-for sustainable utilization of country’s seri-biodiversity potential. Viability and productivity proportion of tasarculture in terms of seeds, cocoons and essentially raw silk, need attention for its vital role in reforming the livelihood and economic condition of rural, backward and tribal farmers. The conventional approaches on basic stock maintenance, commercial seed production, selective use of parental races or parents for heterosis and heterobeltiosis, method of backcrossing to exploit the traits of commercial importance and applying the advantage of GenotypexEnvironment (GxE) interactions are indispensable. In spite of current knowledge on sophisticated transgenic silkworm, appropriate application of on-hand parental resource material and methodologies can expedite tasar silk productivity improvement in addition to up-keep the agro based cottage industry’s cost-effectiveness and biodiversity conservation. The review deals with the current situation and probable strategies for enhancing the productivity and quality of tasar raw silk.
  R. Manohar Reddy
  The commercially important tropical tasar silk insect, Antheraea mylitta Drury (Lepidoptera: Saturniidae) is having 44 ecoraces distributed along central India (12-31°N latitude and 72-96°E longitude) with varied phenotypic, physiological and behavioral characters. The sericigenous insect feeds primarily on Shorea robusta (Sal), Terminalia arjuna (Arjun), Terminalia tomentosa (Asan) besides variety of secondary and tertiary food plants available in tropical deciduous forests of West Bengal, Jharkhand, Bihar, Orissa, Chhattisgarh, Madhya Pradesh, Uttar Pradesh Maharashtra and Andhra Pradesh states of India. Some wild tasar ecoraces like, Raily (Chhattisgarh), Modal and Jata (Orissa), Sarihan and Laria (Jharkhand), Bhandara (Maharashtra) and Andhra (Andhra Pradesh), besides domesticated Daba and Sukinda are contributing for livelihood and alleviating the socio-economic status of around hundred and fifty thousand Indian tribal families. However, the extensive collection of nature grown cocoons, rapid deforestation and human encroachment to insect habitats has declined ecorace population. So, there is an imperative need to involve and educate local tribals on cocoon collection and insect conservation to save from extinction. The orderly involvement of forest, tribal welfare, sericulture departments and Non Government Organizations (NGOs) along with local aboriginals can up-keep the silk insect conservation for sustainable utility. This coordinated management of tasar insect population will also help in rejuvenation of their semi-domesticated relative seri-biodiversity and integrated bio-resource (flora and fauna) management of insect ecozones.
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