Subject(s)
Breast Neoplasms/surgery , Breast Neoplasms/mortality , Breast Neoplasms/radiotherapy , Combined Modality Therapy , Female , Follow-Up Studies , Humans , Mastectomy , Mastectomy, Modified Radical , Mastectomy, Radical , Mastectomy, Segmental , Neoplasm Recurrence, Local , Pregnancy , Radiotherapy Dosage , Time FactorsABSTRACT
Dry seeds of rice varieties 'T(N)1', 'IR 8' and 'Sona', with stabilised moisture content and presoaked in distilled water, were treated with chemical mutagens MMS, dMS, dEMS and dES with the purpose of evaluating chlorophyll mutation frequency and spectrum. In the M2 generation, mutants occurred in 24 lines of 'T(N)1; 94 lines of 'IR 8' but only in six of 'Sona'. They include albino, viridis, xantha and other categories of which viridis was predominant. dES was found to be most effective of all mutagens used in all the three varieties and varietal differences were observed.
ABSTRACT
Mutagenic action of sodium azide was investigated on two grain Sorghum varieties BD 569 and IS 2339. 16 h presoaking and 0.001 molar concentration were found to be most effective in inducing chlorophyll mutation spectrum at pH 3. Maximum frequency of M1 segregating panicles and M2 chlorophyll deficient seedlings were observed in IS 2339. Varietal differences are evident in their response to the mutagenic action of the chemical.
