Genetic Distance and Heterosis through Evaluation Index in the Silkworm, Bombyx mori (L.) | Science Publications

American Journal of Applied Sciences

G. Subramanya¹  Ebrahim Talebi¹ 

关键词: Evaluation index;    genetic diversity;    heterosis;    silkworm;   

DOI  :  10.3844/ajassp.2009.1981.1987

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

Problem statement: Synthesis of new-gene combinations by genetic manipulation is one of the powerful tools in exploiting the commercial qualities of plants and animals. Hybrid performance is evaluated from extensive yield trials that are costly and time consuming. Approach: Four silkworm races belonging to two different voltine groups (two multivoltine races namely Pure Mysore and Nistari and two bivoltine races namely C₁₀₈ and NB₄D₂) and the twelve regular and reciprocal hybrids derived from them were reared under standard laboratory condition analyzing six quantitative traits namely cocoon weight, shell weight, shell ratio, filament length, denier and renditta. The data of the pure races was analysed for the estimation of evaluation index to study the genetic divergence between the races, where as evaluation index, heterosis and overdominance effects were studied in twelve hybrid combinations. Results: Varied heterotic effects were observed for different traits for hybrid combination. Cocoon weight and shell weight has maximum heterosis over the mid parent in Pure Mysore

【 授权许可】

Unknown