Variability in cotyledon as numbers and its influence on hypocotyledon length and wood anatomy in seedlings of Pinus caribaea mor var hondurensis Bars et Golf.
1977
Ankah, E. C.
The degree of hybridity in Pinus caribaea was investigated by determing the percentage distribution of cotyledon numbers in germinants from two seedlots originating from the mountain pine ridge of Belize, Honduras. The relationship between the number of cotyledons and hypocotyl length, and number of cotyledons the number of vascular bundles were investigated. Results indicated that the number of cotyledons (a) varied between 5 and 9, (b) appeared to correlate positively with length of hypocotyl and (c) directly determine the number of vascular bundles in the hypocotyl. It was concluded that (i) in controlled environment experimentation seedlings can and must be homogenised according to cotyledon number in order to eliminate or minimise the genetic component of variation in the observation (ii) the seed source was typified by seedlings with 7 cotyledons since these occured most frequently (39% of total germinants) with least variable hypocotyl length.
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