INVESTIGATIONS ON MUTABILITY OF POLYGENES. Summary of the Results up to September 30, 1961
Estimates on spontaneous mutability for polygenes, data on the relation between dose of radiation applied to seeds in plants and to the male gametes in Habrobracon and increase of the genetic variance, estimates of the dose necessary to double the genetic variance for quantitative traits, and evaluation of the degree of utilization of the induced genetic variability are reported. In the experiments on tomato plants, a radiation damage on the R/sub 1/ was made evident by the decrease in height of the 26 day old seedlings. The number of flowers on the main axis of the R/sub 1/ plants and the rate of flowering both showed an heterotic effect. Results of the irradiation of alfalfa seeds show that the flowering time of plants obtained from treated seed is delayed according to the dose applied. The number of stems per plant is fncreased in two varieties, and the weight of the plant increases at the subsequent cuts in the control plants. As a result of the experiments on Habrobracon juglandis two working hypotheses are proposed concerning inbreeding. (P.C.H.)
- Research Organization:
- Pavia, Italy. Universita. Istituto di Genetica
- NSA Number:
- NSA-16-004032
- OSTI ID:
- 4828799
- Report Number(s):
- TID-13959
- Country of Publication:
- United States
- Language:
- English
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