Genetic analysis of continuous variation following hybridization and irradiation of pea

• Published in: Environmental and experimental botany Vol. 26; no. 4; pp. 349 - 353
• Main Authors: Virk, D.S., Virk, Parminder S., Bedi, Kanwaldip, Multani, D.S., Verma, M.M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 1986; Elsevier Science
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Classical genetics, quantitative genetics, hybrids; Fundamental and applied biological sciences. Psychology; genetic techniques and protocols; genetic variation; Genetics and breeding of economic plants; Genetics of eukaryotes. Biological and molecular evolution; hybridization; irradiation; Mutagenesis; Pisum sativum; Plant breeding: fundamental aspects and methodology; Pteridophyta, spermatophyta; Vegetals; Vegetals; Leguminosae; Mutagenesis; Vegetable crop; Dicotyledones; Pisum sativum; Angiospermae; Irradiation; Spermatophyta; Hybridization
• ISSN: 0098-8472; 1873-7307
• DOI: 10.1016/0098-8472(86)90022-5

F 6 and F 7 generations were produced from control and irradiated F 2 seeds of a cross between Bonneville and T163 varieties of pea ( Pisum sativum L.). Mean performances of these generations, together with those of the parental lines, were compared for ten metric traits and the variability partitioned by a weighted least squares analysis. Irradiation induced both additive and dominance gene effects for three characters, namely, height of first pod bearing node, number of days to flowering and seed yield, and only additive effects for seed number. No variation could be induced for height at flowering, height at maturity, number of secondary branches and total number of pods. Variation neither existed nor could be induced in the number of primary branches and the number of nodes. In general, an additive component ascribable to irradiation was greater than that for conventional segregation, thus increasing the chances of obtaining a wider range of F ∞ pure-breeding lines.