Translocation of Dark Purple Serosa Color Gene (w₂⁺, 10-16.1) to Sex Chromosome W to Induce Sex-limited Egg Color Trait in Silkworm, Bombyx mori L.

• 발행기관: 한국육종학회
• 저자명: S.P. LEE(李相豊) S.M. LEE(李相夢) H.Z. LEA(李浩柱)
• 간행물 정보: 『한국육종학회지』Vol.14 No.2, 1~5쪽, 전체 5쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1982.08.30

영문 초록

Male silkworm:. produce more silk than the female for the same amount of mulberry-leaf consumption. Although sex discrimination at the larval stage has been successful, discrimination at the egg stage is most economical for the male silkworm rearing. For the induction of female sex-limited egg character, the wild type black egg color gene (dark purple serosa color; w₂⁺, 10-16.1) had been translocated to the sex chromosome W by the γ-irradiation (131.6R/min, 7896R) at the middle stage of heterozygous female pupae (w₂⁺ w₂). Through a series of test-crosses to the homozygous white egg male (ZZ, w₂w₂), a translocation type of sex-limited egg color had been identified among black female eggs from 1,423 RBC₁ egg batches. The sex-limited egg character will be utilized to breed commercial varieties with improved practical characters for male silkworm rearing, along with experiments to minimize the duplicated segment in the gerome and to stabilize the translocated portion onto the W chromosome. Also a proposal was presented for the measurement of degree of stability of the translocation; Stability Index (SI). SI value in the study was estimated to be 89.1%.

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ABSTRACT

INTRODUCTION

MATERALS AND METHODS

RESULTS AND DISCUSSONS

LITERATURE CITED

摘要