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New Delhi, India

Carli C.,CIP Liaison Office for Central Asia and the Caucasus | Mihovilovich E.,CIP | Yuldashev F.,CIP Liaison Office for Central Asia and the Caucasus | Khalikov D.,CIP Liaison Office for Central Asia and the Caucasus | Kadian M.S.,CIP SWCA
Potato Research | Year: 2010

In potato breeding and selection, storability should be regarded as equally important as yield, disease resistance, and quality. A study documenting the dormancy period, sprouting behavior, and weight loss of 17 International Potato Center potato elite and advanced clones was carried out in Tashkent, Uzbekistan, under cellar and cold store conditions, during 2008 and 2009. Ninety tubers of each of 17 clones were allocated to experimental units of 30 tubers each placed in trays and randomized in three replications following a random complete block design. Therefore, there were three replications of 30 seed tubers each per entry. The dormancy period ranged from 77 to 115 days and from 100 to 186 days under cellar and cold storage, respectively. There was a relatively high positive correlation (0.69) for dormancy period between storage systems, indicating that clones demonstrating longer and shorter dormancy periods under one system will also behave similarly under the other system. A negative correlation (-0.53 and -0.88) was found between dormancy period and length of the longest sprout in cellar and cold store, respectively, meaning that clones with shorter dormancy often showed a greater length of their longest sprout. The weight loss percentage per tuber was similar in both storage systems, from 5.0% to 8.0% in the cellar and from 5.0% to 9.8% in the cold store, although for different storage periods (an average of 110 and 166 days under cellar and cold storage conditions, respectively). The study indicated that under cellar conditions, clones with a longer dormancy period and slower rate of sprout growth have less weight loss during storage and therefore better keeping quality. © 2010 EAPR.

Rana R.K.,Central Potato Research Institute | Sharma N.,CIP SWCA | Kadian M.S.,CIP SWCA | Girish B.H.,Jain Irrigation Systems Ltd. | And 6 more authors.
Potato Journal | Year: 2011

Present study attempted to understand farmers' perception on attributes they want in future potato varieties in heat-prone areas. For better understanding, priority index (PI; range 0 to 100) and per cent relative importance (RI) of desirable attributes were calculated. Potato farmers' response on yield enhancing attributes, desirable/ undesirable varietal characters, abandonment of varieties, heat/ drought stress, and priorities on attributes in future potato varieties were collected and analysed. Heat tolerance (PI=92; RI=22.5%) followed by high yield (PI=72; RI=17.5%), late blight resistance (PI=48.5; RI=12%), potato-tuber-moth resistance (PI=39; RI=9.5%) and large sized uniform tubers (PI=36; RI=9%) were the top five desirable characteristics. The other attributes in this sequence were drought tolerance, processing quality, early maturity, shining skin and good storability. Heterogeneity of responses on various factors/ attributes related to potato within farm categories was studied using Chi-square statistics.

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