Evolutionary Modifications of Tristylous Breeding Systems

摘要: Tristyly is perhaps the most complex breeding system found in flowering plants. Three floral morphs are populations; short-styled morph, stigmas occur low position, and two sets of anthers mid high levels flower (Fig. 1). In mid-styled positions, occupy position. long-styled positions. Floral trimorphism accompanied by strong self-incompatibility. Pollinations occurring between at same level, necessity those different morphs, were termed legitimate Darwin (1877); these normally only pollinations that lead to fertilization seed production Illegitimate crosses include self- cross-pollinations levels. These usually fail produce seed, although some modified tristylous systems illegitimate may be compatible, result production.