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標題：

Analysis of Varietal Differences in Floral and Fruit Morphology in White Sapote(Casimiroa edulis Llave and Lex.).

作者：

YONEMOTO YOSHIMI、HIGUCHI HIROKAZU、ISHIHATA KIYOTAKE、IKEDA MINORU、TOMITA EIICHI

期刊：

Japanese Journal of Tropical Agriculture (Mar 2001)

ISSN: 0021-5260,

Vol. No.: v. 45(1) p. 38-44

摘要：

Morphological differences in the floral organ and fruit were analyzed among white sapote cultivars which had been experimentally introduced into Japan to select suitable cultivars for pollination or commercial fruit production. Floral morphology of forty-one 3-4 year-old cultivars of white sapote trees grown in a plastic house was examined using a dissecting and light microscope. All the flowers examined were structurally hermaphrodite and showed five petals and five stamens. The ovary lay on a round receptacle without a peduncle. Some cultivars had large yellow anthers containing many pollen grains while some cultivars had pale yellow small anthers without pollen. Observation of the floral morphology of forty 7-8 year-old cultivars of white sapote grown in open fields using a dissecting microscope, showed that these cultivars could be divided into three groups; cultivars with large ovaries (and stigmas) and lacking pollen (Type 1; twenty-four cultivars such as 'Florida', 'McDill'), cultivars with small ovaries (and stigmas) and producing pollen in large anthers (Type 2; fifteen cultivars such as 'Suebells', 'Vernon'), and only one cultivar with a large ovary (and stigma) producting pollen in large anthers (Type 3; 'Maltby'). Type 3 cultivar exhibited a floral morphology that had not been reported hitherto. No seasonal changes in the floral morphology were observed in any of the cultivars. In Type 1 cultivars which produced more than 200g fruits, the seed weight and the number of fertile seeds were larger. These findings indicate that Type 1 cultivars are suitable for large fruit production and Type 2 or Type 3 cultivars could be used as pollinators.

詳文出自　http://sciencelinks.jp/j-east/article/200110/000020011001A0409766.php