On the inheritance of the juvenile period in apple

✍ Scribed by T. Visser

• Book ID: 104617758
• Publisher: Springer
• Year: 1965
• Tongue: English
• Weight: 600 KB
• Volume: 14
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00038976

✦ Synopsis

The following observations were made on the inheritance of the juvenile period (elapsing between seed germination and first flowering) of apple seedlings. 1. Highly significant correlations (0.52 and 0.78 at n = 382 and 71) were found between the length of the juvenile period and the degree to which seedlings or progenies as a whole show juvenile symptoms. This relation may provide a basis for the early elimination of seedlings with a relatively long juvenile period (and which are possibly late-bearing). 2. Significant correlations (ca. 0.5 at n = 42-80) existed between the length of the juvenile period of progenies and parent characters such as season of flowering, season of fruit picking (ripening) and the length of the growth period of the fruits (elapsing between flowering and picking). It is suggested that these characters are measures of the (fruit) growth rate and as such influence the juvenile period of the progenies. 3. A strong correlation (0.77 at n z 42) existed between the length of the juvenile period of the progenies and the length of the vegetative period of the parents tperiod elapsing between grafting and first-bearing). This infers that seedlings of latebearing parents would inherit two undesirable characters as they would probably come late into bearing both in the juvenile and the adult phase. 4. Presumptive evidence suggested that the factors which govern flowering in the juvenile and the adult phase are the same in both instances.