Boil-off Loss Ratio of Cocoon Shell as a Selection Criterion in the Newly Developed Bivoltine Silkworm (Bombyx mori L.) Hybrids
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Boil-off loss ratio is one of the most important economic traits to be considered during thecourse of silkworm breeding. The boil-off loss ratio varies among the breeds and seasons. The present study was undertaken with 5 oval and 5 peanut breeds and twenty fivehybrids involving these parents to select the promising hybrids with desired boil-off lossratio. Accordingly, studies were undertaken to estimate the heterosis and heterobeltiosis. Itwas observed that majority of the hybrids revealed negative heterosis for boil-off loss ratiowhich is desirable. Based on the heterosis and heterobeltiosis, among all the hybrids, thehybrid APBRO5 x APBRD5 exhibited highest negative heterosis for boil-off loss ratio andalso exhibited highest EI value (64.5) for the quantitative and qualitative traits. Based on thehybrids performance, boil–off loss ratio, heterosis and heterobeltiosis and evaluation index,the hybrids viz. APBRO5 x APBRD5, APBRO1 x APBRD1 and APBRO3 x APBRD4 wereidentified for commercial exploitation.
Abstract
Boil-off loss ratio is one of the most important economic traits to be considered during thecourse of silkworm breeding. The boil-off loss ratio varies among the breeds and seasons. The present study was undertaken with 5 oval and 5 peanut breeds and twenty fivehybrids involving these parents to select the promising hybrids with desired boil-off lossratio. Accordingly, studies were undertaken to estimate the heterosis and heterobeltiosis. Itwas observed that majority of the hybrids revealed negative heterosis for boil-off loss ratiowhich is desirable. Based on the heterosis and heterobeltiosis, among all the hybrids, thehybrid APBRO5 x APBRD5 exhibited highest negative heterosis for boil-off loss ratio andalso exhibited highest EI value (64.5) for the quantitative and qualitative traits. Based on thehybrids performance, boil–off loss ratio, heterosis and heterobeltiosis and evaluation index,the hybrids viz. APBRO5 x APBRD5, APBRO1 x APBRD1 and APBRO3 x APBRD4 wereidentified for commercial exploitation.
참고문헌 (22)
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