ISSN:
1432-2242
Keywords:
Key words Synthetic cultivars
;
True potato seed
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract True potato seed (TPS) may be an alternative method of potato production in developing countries. A breeding method for the sexual propagation of this vegetatively propagated crop should consider the development of parental lines and the type of cultivar to be released. Open-pollinated (OP) cultivars seem to be an inexpensive procedure to produce potato from true seed. However, OP progenies are the result of selfing and outcrossing in male-fertile tetraploid potatoes. The aim of the present research was to establish the effect of inbreeding and open pollination in TPS. Ten Andigena clones were used as parental material to derive hybrid (S0), inbred (S1 and S2), and open-pollinated (OP1 and OP2) generations. Significant differences among generations were found for pollen production, pollen viability (as determined by its stainability with aceto-carmine glycerol), number of flowers and berries plant-1, number of seeds berry-1, weight of 1000 seeds, and tuber yield plant-1. The parental populations were significantly different for most of the traits, but not for flower production and berry weight. The interaction of population ×generation was significant for pollen and seed production as well as for weight for 1000 seeds. All the traits evaluated except seed weight showed a strong inbreeding depression, while the OP progenies had intermediate values between the S0 and the S1. This demonstrates that open pollination in potatoes is not exclusively the product of selfing; it also results from outcrossing.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s001220051000
