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Current IssueEditorial BoardOnline First ArticlesArchive

volume 42 issue 4 (december 2008) : 235-243

EVALUATION AND SELECTION OF BREEDING RESOURCE MATERIAL OF BIVOLTINE SILKWORM BOMBYX MORI L. SUITABLE TO TROPICAL CONDITIONS

H
H. Lakshmi
C
Chandrashekharaiah
1Andhra Pradesh State Sericulture Research and Development Institute, Kirikera, Hindupur - 515 212, India

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Cite article:- Lakshmi H., Chandrashekharaiah (2025). EVALUATION AND SELECTION OF BREEDING RESOURCE MATERIAL OF BIVOLTINE SILKWORM BOMBYX MORI L. SUITABLE TO TROPICAL CONDITIONS. Indian Journal of Agricultural Research. 42(4): 235-243. doi: .

ABSTRACT

Breeding strategies directed towards the development of hardy bivoltine races to improve the
quality and unit production of silk, warrant the selection of suitable parental material and their
effective utilization. In this direction, forty seven bivoltine breeds maintained as germplasm at
Andhra Pradesh State Sericulture Research Institute, Hindupur were reared under summer (high
temperature (30 - 36°C) and low humidity (50 - 55%) conditions. Nine quantitative and qualitative
traits of the breeds are considered for evaluation based on the Joint Scoring index method. Based
on the evaluation, twenty bivoltine breeds comprising of ten oval breeds which scored lower values
viz., APS5 (2.5764), APS7 (3.3050), APS19 (3.6508), APS11 (4.0610), APS9 (4.1034), APS31 (4.2272),
APS27 (4.2939), APS45 (4.2956), APS39 (4.5588) and APS17 (4.7332) (oval) and ten peanut breeds for
APS4 (3.1863), APS8 (3.2886), APS32 (3.4138), APS24 (3.5794), APS12 (3.8078), APS16 (3.9715)
APS18 (4.1263), APS62 (4.2164), APS6 (4.2656) and APS10 (4.3777) were adjudicated as potential
breeding resource material for initiation of breeding programme for the development of bivoltine
silkworm hybrids suitable for tropical conditions.

KEYWORDS

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    Indian Journal of Agricultural Research
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