木瓜(Carica papaya L.)诱变敏感性的测定及其表现。Arka Prabhath

IF 0.2 Q4 HORTICULTURE Journal of Horticultural Sciences Pub Date : 2023-06-30 DOI:10.24154/jhs.v18i1.2143
N. Bhat, M. Dinesh, H. Vageeshbabu, G. Acharya, S. Dash, S. C. Swain
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引用次数: 0

摘要

番木瓜是番木瓜科重要的水果作物,在抗病毒性和保鲜期方面有待提高。突变育种技术一直被认为是植物育种家创造木瓜变异的有效手段。突变体的突变频率和种群结构直接取决于突变原的类型和暴露时间。无论使用何种诱变剂,最终诱导的突变都是随机的,因此确定诱变敏感性是重要的先决条件。在此基础上,进行了番木瓜变异诱变的研究。Arka prabhas的目标是通过物理诱变剂创造遗传变异。在这项研究中,木瓜种子受到五种不同剂量的γ射线照射,剂量从50 Gy到500 Gy不等。结果表明,随着γ射线剂量的增加,种子萌发率、成活率逐渐降低,种子萌发延迟。基于概率分析,LD50(致死剂量)固定为186.24 Gy。突变后共发生7种类型的叶绿素突变。较低剂量γ治疗(50 Gy)的诱变效率和效果较高。
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Determination of mutagenic sensitivity and its manifestations on papaya (Carica papaya L.) cv. Arka Prabhath
Papaya is an important fruit crop of the family Caricaceae which needs the improvement in terms of virus resistance and shelf life with dwarf stature. Mutation breeding technique has been considered as an efficient tool adopted by plant breeders to create variability in papaya. The mutation frequency and population structure of the mutants directly depend upon the type of mutagen and the time of exposure. Irrespective of the used mutagens, the ultimate induced mutations are random and therefore determination of mutagenic sensitivity is important pre-requisite. Based on this, investigation on the induction of mutation in papaya cv. Arka Prabhath was carried out with the objective of creating genetic variability through physical mutagen. In this study, papaya seeds were irradiated with five different dose of gamma rays ranging from 50 Gy to 500 Gy. The results revealed that gradual reduction in germination, survival of seedlings and delayed germination with increase in dosage of gamma rays. Based on probit analysis, LD50 (Lethal dose) was fixed at 186.24 Gy. Total seven types of chlorophyll mutants were observed as a result of mutation. Mutagenic efficiency and effectiveness were higher in a lower dose of gamma treatment (50 Gy).
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来源期刊
Journal of Horticultural Sciences
Journal of Horticultural Sciences Agricultural and Biological Sciences-Plant Science
CiteScore
0.30
自引率
0.00%
发文量
0
审稿时长
6 weeks
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