Law of Genetic Variation of the Progeny of Cotton (Gossypium hirsutum L.) Irradiated by γ Ray

doi:10.3321/j.issn:1000-7091.2006.02.007

Abstract

Abstract: The seeds of three cotton lines were irradiated by Co⁶⁰γ Ray.Genetic variation of agronomic and economic traits of their M4,M5 progeny was analyzed.The results showed that:(a)The coefficient variation (CV) and the indexes of genetic diversity of the phenotypic characters among M4 or M5 colonies derived from 3 cotton varieties were very significant.This clarified that the radiation of different cotton varieties resulted in the different uniformity and abundant of the variation.(b) Correlation analysis indicated that the correlation coefficient of phenotypic characters in the colonies of M4 and M5 were significant at 0.01 levels,and those of lint percentage,boll weight,plant height,fiber length,strength of fiber,fiber micronaire also between M4 and M5 also were very significant.This proved that the genetic variation of the phenotypic characters in the irradiated progenies of cotton variety can inherit,and intend to be stable in the progenies Mt and M5.(c) The range of genetic distance of phenotypic characters among the mutagenic progeny M5 of 3 cotton varieties were 1.83-34.68,1.26-34.55,2.22-17.05 respectively.Moreover,a series of mutants with significant variation were screened.The analysis of phenotypic characters illuminated that γ-ray radiation can result in abundant genetic variation.

Key words: Cotton, Co^60y ray, Agronomic and econormc traits, Genetic variation

CLC Number:

S562.035.2

SUN Jun-ling, DU Xiong-ming, ZHOU Zhong-li, PAN Zhao-e, PANG Bao-yin. Law of Genetic Variation of the Progeny of Cotton (Gossypium hirsutum L.) Irradiated by γ Ray[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(2): 27-33. doi: 10.3321/j.issn:1000-7091.2006.02.007.

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