Triploid Interspecific Hybrids Research Articles

Interspecific Triploid Hybrid in Grape

SUMMARYRX 45–3 is a triploid hybrid with 2n = 59. On an average, the meiotic chromosome pairing noticed is 18.1 I (range 0–21), 15.0 II (7–20), 2.2 III (1–6), 0.9 IV (0–2). 0.14 VI (0–2), and 0.7 fragments (0–3).No set was obtained when rotundifolia varieties were crossed with hybrid pollen while about 30% of the flowers set in vinifera. Majority of the berries produced were seedless and small in size. Most of the seeds gathered were floaters. The full seeds varied much in size due to the correspondingly great variation in the size of the pollen.The hybrid is extremely vigorous and looks more like rotundifolia. The importance of the hybrid in producing a desirable root-stock and may be a fruiting variety is indicated.

Cytological observations inCoffea. IV

1. A short description is given of the main morphological characters of two interspecific triploid hybrids (C. arabica × C. canephora); their growth habit is normal and leaf and flower characters are intermediate in shape and size when compared with their parents.

A MORPHOLOGICAL COMPARISON OF TRIPLOID AND TETRAPLOID INTERSPECIFIC HYBRIDS IN TRADESCANTIA

A MORPHOLOGICAL COMPARISON OF TRIPLOID AND TETRAPLOID INTERSPECIFIC HYBRIDS IN TRADESCANTIA