The mode of gene action in flue-cured tobacco

✍ Scribed by D. M. Gopinath; R. Lakshminarayana; C. L. Narayana

• Publisher: Springer
• Year: 1967
• Tongue: English
• Weight: 408 KB
• Volume: 16
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00043464

✦ Synopsis

A study was made on the quantitative inheritance of seven characters viz ., flowering time, plant height, leaf length, leaf width, number of curable leaves, green weight and cured weight for two crosses of flue-cured tobacco Chatham x Delcrest and 232 x Hicks. Six genetic populations P1, P2, F1, F2, B1 and B 2 were observed in each cross.

Small and significant values of heterosis were observed for almost all the characters for the two crosses . Significant average inbreeding depression was found for all the characters in both the crosses.

Significant additive and dominant effects were found for the various characters in the cross Chatham x Delcrest in which the dominance gene effects were high . While in 232 x Hicks cross, additive gene effects contributed much in controlling the characters studied.

Significant epistatic effects were found for leaf length and number of leaves in the cross Chatham x Delcrest, flowering time and plant height in 232 x Hicks by x 2 test . Indications of exploiting these above two characters in plant breeding were revealed by these studies and a systematic approach in planning for such exploitation would be possible by further investigations .