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Degeneration Study of Virus Resistance Cip Potato Germplasm in Bangladesh

Md. Mijanur Rahman
Scientific Officer
Regional Agricultural Research Centre Jamalpur

Mrs. Selina Akhter
Scientific Officer
Regional Agricultural Research Centre Jamalpur

Dr. Mohammad Hossain
Chief Scientific Officer
Tuber Crops Research Centre Bangladesh Agricultural Research Institute Joydebpur, Gazipur-1701 Bangladesh

Dr. Biresh Kumar Goswami
Chief Scientific Officer
Tuber Crops Research Centre Bangladesh Agricultural Research Institute Joydebpur, Gazipur-1701 Bangladesh

M. Begum, B.C. Kundu, M.S. Kadian, M.M. Hasan and E.H.M.S. Rahaman

Abstract/ Executive Summary:

Six CIP potato clones with check variety Diamant were evaluated at Jamalpur and Jessore during 2012-13 for their suitability in resistance to different virus diseases of potato. The severity of PLRV and mosaic virus incidence increased gradually with the increase of crop generation and it was observed highest in ware practice (T1) in both Jamalpur and the CIP clones grown from healthy tubers (T5) was significantly higher as compared to plants grown from older generation tubers in both the locations. Senescence of all the CIP clones at 75 DAP grown from new generation tubers (T5) was significantly lower as compared to plants grown from degenerated tubers. In Jessore & Jamalpur, lowest degeneration rate for number of tubers per plant was observed in CIP 8 (19.10% & 14.32%, respectively) while highest was noticed in Diamant (35.96% & 32.58%, respectively). The lowest degeneration rate for yield (t/ha) was observed in CIP 8 (31.05%) followed by CIP 1 (31.74%) and CIP 13 (35.45%) at Jessore and CIP 13 (29.68%), CIP 1 (30.93%) and CIP 8 (31.98%) at Jamalpur, respectively. Considering both the locations, lowest degeneration rate was recorded in CIP 8 (16.71%) followed by CIP 10 (22.86%) for number of tubers/plant and yield reduction was lowest in CIP 1 (31.33%) followed by CIP 8 (31.51%) and CIP 13 (32.56%). Considering all the treatments and locations, degeneration rate was highest in Diamant for both the traits like number of tubers per plant (34.27%) and yield (37.00%).

Keywords: Potato, Degenaration

Location: Jessore and Jamalpur

Start Date: 10-11-2012

End Date: 04-15-2013

Program Area: Variety and Species

Commodity: Potato

Objectives:

1. Degeneration estimation of virus resistance CIP clones 2. Selection of high yielding varieties

Methodology:

The experiment was conducted in four consecutive cropping seasons of 2009-10, 2010-11, 2011-12 and 2012-13 at the experimental field of RARS Jamalpur and Jessore. The seed potato obtained from 2009-10, 2010-11 and 2012-2013 were planted in the subsequent year of 2010-11 2012-2013 and 2012-13, respectively where advancement occurred in each of the generations. There were two practices like improved & ware production practices. In improved practices, insecticides were sprayed at 15 days interval to control aphids, on the other hand, no insecticides were used in ware practice but fungicide and fertilizer application were same in both the practices. The experiment was consist of five treatments viz, T5 = Improved practice (new-year tuber set, Generation-1); T4 = Improved practice (second-year tuber set, Generation-2); T3 = Improved practice (third-year tuber set, Generation-3); T2 = Improved practice (fourth-year tuber set, Generation-4); T1 = Ware practice (fourth-year tuber set, Generation-4). Last year selected six best performed CIP clones viz., CIP-1 (CIP 390637.1), CIP-2 (CIP 391846.5), CIP-8 (CIP 395195.7), CIP-10 (CIP 397029.21), CIP-13 (CIP 397073.7) and Diamant were used as check variety. Fertilizers were applied @ 325-220-250-120 kg/ha of Urea, TSP, MP and Gypsum, respectively. Full amount of TSP, MP and Gypsum and 50% of urea were applied as basal and the remaining amount of urea was side dressed at 35 DAP. Weeding, fungicide spraying and other intercultural operations were done as and when necessary. The crops were haulm pulled at 90 DAP. Different growth and yield contributing characters data were recorded and statistically analyzed. The planting and harvesting were done 27.11.2012, 10.03.2013 at Jamalpurand 27.11.2012, 10.03.2013 at Jessore, respectively.

Source of Information: TCRC Annual Report 2012-13

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 40000/-

Total Budget (Tk.) : 40000/-

Achievement/Findings:

Six CIP potato clones (CIP-1, CIP-2, CIP-8, CIP-10, CIP-11 and CIP-13) were selected for further study.

Knowledge Management: Report/Proceedings