• Title/Summary/Keyword: Male-sterile

Search Result 140, Processing Time 0.024 seconds

Studies on Heterosis Breeding in Rapeseed Using Cytoplasmic Male Sterility 2, Agronomic Characteristics of F_1 Seed Production Procedure in the Three-way Crossing of Cytoplasmic-genetic Male Sterile, Non-Isogenic Maintainer and Restorer on Rape (Brassica napus L.) (세포질 유전자적 웅성불임계통을 이용한 유체 Heterosis 육종 개발에 관한 연구 제2보 웅성불임계통에 Non-Isogenic Maintainer를 활용한 유체 3원교잡F_1의 형질발현과 F_1종자생육)

  • Jung-Il Lee;Jung-Il Lee
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.25 no.2
    • /
    • pp.49-57
    • /
    • 1980

  • A $F_1$ hybrid out of 143 crosses of rape (Brassica napus) using cytoplasmic-genetic male sterility yielded 5.18 tons per hectare. European and native varieties used, were found out to have 78% and 58% of genes restoring fertility, respectively. The $F_1$ hybrids of three way cross using non-isogenic maintainer showed higher heteroses than those of double cross. To produce F 1 hybrids of three way cross, three stages of crossing operations are needed and seeds produced from about 60 hectares can be covered to 60, 000 hectares.

  • PDF

CHANGES IN SUBPOPULATION OF BRONCHOALVEOLAR LAVAGE FLUID IN THE PULMONARY FIBROSIS INDUCED BY BLEOMYCIN OR PEPLOMYCIN

  • Kim, Dae-Joong
    • Toxicological Research
    • /
    • v.9 no.2
    • /
    • pp.241-251
    • /
    • 1993

  • Present studies were carried out in order to estabilish the bronchoalveolar lavage method and to examine the response of bleomycin and peplomycin on the total cell number and the subpoulations of bronchoalveolar lavage fluid. A total of 24 male F344 rats, weighing 300-350 mg, were divided into 3 groups. Animals recelved either belomycin (BLM` 0.75 mg/0.2 ml/rat), peplomycin (PLM` 0.25mg/0.2ml/rat) for groups 2 and 3 or an equal volume of sterile saline lacking drugs for controls (group 1).

  • PDF

Effects of Polyphosphate on Skin Wound Healing in Rabbits (토끼 피부창상 치유에 있어서 Polyphosphate의 효과)

  • 이광인;한정희;채수경;김홍렬;이창훈;정성목;서강문
    • Journal of Veterinary Clinics
    • /
    • v.20 no.2
    • /
    • pp.198-206
    • /
    • 2003

  • The purpose of the present study was to investigate the effect of polyphosphate on healing of skin wound in rabbits. Four skin wounds of 8mm in diameter were induced bilaterally(4 wounds/rabbit) on the dorsolateral aspect of the trunk of 15 male New Zealand white rabbits. Ten percent polyphosphate(poly P) type 25, 10% poly P type 35, 10% poly P type 25+10% poly P type 35 and 0.85% sterile saline solution were applied on the wound area and examined grossly and histopathologically. The rate of wound contraction and histopathological changes after poly P application on the skin wound were investigated. In gross findings, the wound contraction rates of 10% poly P 25 group were significantly decreased from day 2 to day 7 after operation than those of 0.85% sterile saline solution treated group (p < 0.01). Although the hemorrhage and inflammation were observed on days 3, 6 and 9 after operation in all groups, but in 10% poly P 25 was gradually decreased. Revascularization and reepithelialization were seen 3, 6 and 9 days after operation in all groups, especially in 10% poly P 25 was formed completely on 9 days. Fibroplasia were seen 3. 6 and 9 days after operation in all groups, especially in 10% poly P 25 was compact than other groups on 9 days. The results suggested that polyphosphate, especially 10% poly P 25 would be effective on healing of skin wound in rabbits through decrease of would contraction rate, increase of revascularization, reepithelialization and fibroplasia.

  • PDF KSCI