Black Currant Breeding: a Progeny Test of Four Cultivars and a Study of Inbreeding Effects

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Abstract
Summary The breeding values of the black currant cvs Amos Black, Malvern Cross, Mendip Cross and Wellington XXX were assessed for 13 characters by examination of the 10 progenies derived from selfing and intercrossing. No cultivar emerged as superior overall to the other cultivars, but each had merits or demerits for individual characters many of which could have been forecast from phenotype. By comparing progenies derived from selfing, sib crossing and half-sib crossing the effects of different levels of heterozygosity were investigated. For 8 of the characters the degree of inbreeding had a pronounced effect on progeny parameters. While some of the consequences of inbreeding seemed conducive to high yields, others were apparently antagonistic, and it is suggested that the relationship between the parents should be taken more into account when planning a breeding programme.

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