On the relation of half-hoariness in Matthiola to glabrousness and full hoariness
The results recorded here and in the earlier work form a concordant body of facts concerning surface character which the scheme of factor relations here suggested enables us to bring together into a comprehensible whole. These factor relations involve five factors—C, R, H, J, K —inter-acting as three distinct pairs.
The pairCR essential to the production of sap colour.
The pairHK producing the fully hoary condition but only effective when theCR pair is also present.
The pairJK which produces a less degree of hairiness thanHE. For this reason the presence ofJ can only be detected in the absence ofH. The effect of the combinationJ andK is to produce the condition known as half-hoary if the individual has the constitutionJJKK orJjKk, i.e. if the dose of the two factors is equal. IfK has been brought in on both sides of the pedigree andJ only on one, i.e. if the individual has the constitutionJjKK, the result is to dilute the effect ofJ, and the individual exhibits the lesser degree of hairiness known as quarter-hoary. It remains to determine the appearance of the individual in the reverse case when the constitution isJJKk, and also to ascertain whether the effect ofJ is independent ofC andR or whether, likeH, it is only effective when the colour pair is also present.
Volume 100, 2021
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