← Back to results
Page 56 · DO #4926 · 231_Rogers_Bx9FF8_r
- Collection
-
David James Rogers (1918–2007) papers
- Item/Folder
-
Manihot - Correspondence; Publication, 1972–1973
- Digital Object
-
DO #4926,
page 56
- Collection-level dates
- 1948–1977
Page transcription
1-12, three groups (Nos. 8, 9, 10) have roots whose flesh color is yellow. The remaining nine groups have white-fleshed roots. Inspection of the descriptions of the nine groups is now required to give most accurate relationship of an unknown. We must add a word of caution: in the species with the large number of variations contained in it, and by the nature of the recombination of characters, there is no guarantee that any new cultivar cannot be assigned to more than one group. The major relationships will remain relatively constant, but below these, there is a good chance that there will be difficulty of assignment to one specific group.
In addition to the above methods of group assignment, the investigator will be aided by examination of the data given in Tables 2 and 3. These tables relate the stem colors to the root colors. Generally, plants with brown, dark brown, or reddish-brown stems are rough-rooted, and plants with light brown, tan or light tan stems have smooth-surfaced roots. Those plants whose stem color vary from these states are indicated in Tables 2 and 3, so that these can be assigned to the major categories given in Fig. 3.
Since the objectives of this classification are to show relationships that might be useful for plant breeders and others working with this species as a crop plant, the classification may not serve the needs of those interested in the identification of herbarium specimens.
