Inheritance of genetic markers from two potato dihaploids and their respective parent cultivars

Abstract

Potato. dihaploid, marker genes . SUMMARY In the first inbred generation (I,) of cv . Black 4495 a dark green, slowly growing mutant (coded ds) was found, whereas the 1, of its self-compatible dihaploid, B16, comprised this ds mutant and in addition the mutants virescens (v) and yellow margin (ym). The occurrence of ds and ym might trace back to diploid S . phureja, one of the ancestors of Black 4495 . No lethal mutants were observed in 1, of B16 . Analysis of I, of cv . Gineke revealed a simplex condition for virescence and either duplex or triplex heterozygosity for one lethal gene . On the other hand, the I, of its dihaploid, G254, segregated for virescence and for three different lethal genes . It is shown that both in B 16 and in G254 homozygosity of an S-bearing translocation causes early death of embryo and endosperm, thus preventing seed development . From this study it appeared that the three lethal genes from G254 affect germination rate of the seeds . The genotypes at 11 loci of B 16 and G254 are presented .

Single cell origin of adventitious buds

“…This was published for instance already by CORRENS (1919) for Caps&. More recently it was reported for potato that yellow leaf margin and variegated tuber skin are genetically controlled (HOWARD, 1970;HERMSEN et al, 1978). Some variegated ornamental plants are even seed-propagated, as are Coleus cultivars and foliage begonias, which often strikingly resemble real periclinal chimeras.…”

Fertility, plant morphology, and transmission rates of the extra chromosome in single and double trisomics of Solanum tuberosum L. Group Tuberosum

“…It must be kept in mind, that the genetical background will play an important role in such a relationship. For the material of the present study it is important to know that HERMSEN et al (1978) found three lethal genes in G254 which affect the germination rate of the seeds. Such genes might be present and segregating in the trisomic material as well, since G254 was the male parent in all original 3x x 2x crosses.…”

Identification of the trisomic series in diploid Solanum tuberosum L. group Tuberosum. II. Trivalent configurations at pachytene stage

“…Several marker genes have already been reported in diploid potato (DODDS & LONG, 1955, 1956SIMMONDS, 1965;DE JONG & ROWE, 1972;HERMSEN et al, 1978). These developments are particularly encouraging for establishing a trisomic series in diploid S. tubcrosum.…”