Seeds of sunflower line AS-613 were irradiated with Gamma rays and 1557 M4 progenies were studied for their germination characteristics and the following traits were studied: thousand seed weight, seed size, time before emergence, percentage of emerged seedlings, hypocotyl length and diameter, number of cotyledons and cotyledons pigmentation intensity. A high genetic variability was observed for all the studied traits. Through M4 progenies, 9 mutants presenting much differences with the original genotype (AS613), were planted in a randomized blocks design with 8 replications in a controlled green house and some morphological and physiological traits were studied which are: plant height, number of leaves, total leaf area, net photosynthesis, transpiration, stomatal conductance, water use efficiency and net carbon assimilation. When harvesting, flower head diameter, head weight, stem weight, leaves weight, total number of seeds per plant, and thousand seed weight were measured. The differences between mutants and also non irradiated genotype (AS 613) were significant for most of studied traits suggesting that several developmental processes have been modified.
|Журнал||Journal of Genetics and Breeding|
|Состояние||Опубликовано - дек. 2004|
|Опубликовано для внешнего пользования||Да|