Field evaluation of true potato seed progenies in the Philippines

Zaag, P. Vander; Susana, B.; Ganga, Z.; Gayao, S.

doi:10.1007/bf02854431

Cited by 6 publications

(3 citation statements)

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“…In Vietnam, lack of vigorous growth, low tuber yields, and excessive proliferation of small tubers plague TPS production (47). In the Philippines, except for high elevation environments, where seedlings are grown under optimum temperatures for rapid plant growth and tuber enlargement (25), potato production using TPS in the lowlands has been poor at best and in most cases the resulting tuber yields have been lower than that of tuber propagated plants, i.e., as low as 5 to 13 Mg/ha using densities of 150 to 300 tuberlets/m 2 (15). Evidently, several factors simultaneously affect TPS production and the mechanisms for overcoming them are either inefficient or are not fully implemented.…”

Section: Potentials and Constraintsmentioning

confidence: 99%

“…In Egypt, media containing 70% (by volume) of soil, and 15% of sand and 15% of peatmoss (or a mixture of well decomposed cow manure and straw) are also used by small farmers (24). In the Philippines, media containing finely ground compost fertilized with phosphorus (P) are routinely used by small farmers (25).…”

Section: Requirementsmentioning

confidence: 99%

“…The standard recommendation is that 1,000 seedlings/m 2 can be produced in 35 days by using a growing media of sand and peat moss fertilized with 10, 30, and 10 g of N, P, and K per 100 kg of media (4). In the Philippines, seeds are first sown on trays using compost media with some P added (25) and then transplanted into beds at a density of 30 plantlets/m 2 . Following this procedure, farmers usually harvest two crops per year with a yield of 373 tubers/m 2 , of which 12% of the tubers weigh more than 25 g and 60% of tubers weigh 5 g (26).…”

Section: Requirementsmentioning

confidence: 99%

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Use of true potato seed in the tropics: Potentials and realities

Manrique

1994

Journal of Plant Nutrition

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In the tropics, the high costs and limited availability of high quality tuber seed are the major constraints for successful potato production. In the last fifteen years or so, true potato seed (TPS) has emerged as one alternative with exceptional potential for eliminating many of the problems associated with tuber seeds. The technology has generated greater expectation and many local potato programs are already using TPS within their propagation programs. Yet, given the level of expertise needed to manage TPS-based potato production, it is not clear whether TPS can be successfully used at the farmer level. This paper reviews key features of the TPS technology and assesses the performance of TPS at various locations in the tropics.

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Section: Potentials and Constraintsmentioning

confidence: 99%

Section: Requirementsmentioning

confidence: 99%

Section: Requirementsmentioning

confidence: 99%

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Use of true potato seed in the tropics: Potentials and realities

Manrique

1994

Journal of Plant Nutrition

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A review of potato propagation by means of seed, as distinct from clonal propagation by tubers

Simmonds

1997

Potato Res

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SummaryThe vast majority of cultivated potatoes are vegetatively propagated, outbred autotretraploids. Disease problems dominate the maintenance of vegetative stocks. There have been recent proposals to propagate the crop by sexual seed in order to evade some of those disease problems. Some success has been achieved but controlled crosses are necessary fo avoid inbreeding depression and seed propagation is not as cheap or simple as had been hoped. The idea has evoked wide interest throughout the tropics and has had some (and increasing) practical impact on China, India and Vietnam. There is a strong tendency to use ~tuberlets' borne on crowded nursery plants rather than to grow true seedlings. Some seedling families have looked locally attractive but it is not always realised that to use them implies the abandonment of about half the genetic variation, a heavy price to pay for disease avoidance. There is emerging recognition that vegetative and seed propagation are complementary rather than competitive and that good breeding programmes will therefore serve both. This review concentrates upon genetic/plant breeding aspects of propagation by seed, a subject hitherto largely neglected in the literature.

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