CROSS ABILITY BETWEEN COMMERCIAL CULTIVARS AND INTERSPECIFIC HYBRIDS (STOLONIFERUM X TUBEROSUM) ADVANCED CLONES OF POTATO TUBEROSUMBahram Dehdar , Jaber Panahandeh and Alireza Motalebi Azar
There are about 230 species of wild potato relatives; there are valuable genes of disease resistance, stress tolerance, and beneficial agronomic and processing traits in many of them. In interspecific and intraspecific crosses, pre-zygotic barriers like pollen-pistil incompatibility may exist. And in the case that a parent is selected as male or female, this incompatibility may disappear. In this experiment, seven high-yielding commercial cultivars of potato and two advanced potato clones of direct interspecific hybrids (S.stoloniferum X S.tuberosum), with resistance to drought stress were crossed reciprocally to determining of cross ability between genotypes, and the best cultivar and clones were determined when they were selected as the female or male parent. Generally, when the commercial cultivars were as the male parent, the number of berries, the total number of seeds, the number of the seeds per berry, cross efficiency and the germination percentage of true seeds generated were 8, 139, 17.4, 0.04, and 33%, respectively; and when was female, they were measured as 41, 1579, 9.5, 3.8, and 50%, respectively.
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