Inheritance of flower color inDendranthema grandifloraTzvelev. (Chrysanthemum morifoliumRamat.) using cultivars and inbreds. I. Plastid pigmentation

✍ Scribed by Tim M. Teynor; Peter D. Ascher; R. E. Widmer; J. J. Luby

• Book ID: 104616101
• Publisher: Springer
• Year: 1989
• Tongue: English
• Weight: 634 KB
• Volume: 42
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00034455

✦ Synopsis

Progeny from controlled crosses of 28 garden chrysanthemum (Dendranthema grandiflora Tzvelev .) inbreds in various combinations as males with 3 heterozygous cultivars and 10 inbreds as females were evaluated for plastid pigmentation in a series of field and glasshouse environments . Disomic inheritance of a dominant gene, which acts to inhibit pigmentation, best explained the data . However, 1 of 8 families involving a glasshouse cultivar with colorless plastids ('Puritan') as female and inbreds with yellow plastids as males deviated significantly from the expected 1 :1 ratio . This family consistently exhibited an excess of plants with colorless plastids . Although parent clones and cloned progeny from inbred parents were scored the same in field and glasshouse environments, reevaluation in the field of all 8 `Puritan' families, first evaluated in a glasshouse environment, revealed phenotypic misclassification apparently due to environmental effects . An excess of plants with colorless plastids appeared in the glasshouse but evaluation of the same genotypes in the field resulted in an excess of plants having yellow plastids . Submerging ray florets in a hot-water bath revealed yellow plastids masked by vacuolar pigments, thus reducing chances of misclassification . The data suggest that evaluation of highly variable families in a single environment can lead to misclassification of plastid pigmentation . However, even with evaluation in 2 or more environments, certain families may exhibit an excess of plants with colorless plastids .