Fertility and segregation of the amphidiploidPhaseolus vulgarisL. xP. coccineusL. and its behaviour in backcrosses

✍ Scribed by J. Smartt; Nazmul Haq

• Book ID: 104617980
• Publisher: Springer
• Year: 1972
• Tongue: English
• Weight: 414 KB
• Volume: 21
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00039345

✦ Synopsis

Amphidiploidy was induced by colchicine treatment of cuttings from the F, interspecific hybrid Phuseolus vulgaris L.? x Ph. coccineus L.$. Pollen stainability rose from about 50 % in the raw amphidiploid to 76 % in some C5 individuals; similar improvement in seed fertility was also observed. It is suggested that both genie and chromosomal factors are implicated in the control of fertility in the amphidiploid.

The amphidiploid is apparently unable to cross successfully with either parental species ; difference in ploidy level is apparently an effective isolating mechanism between the amphidiploid and its parents.