Screening of Some Varieties of Groundnut (Arachis Hypogea L.) Against Rosette Disease in Nigerian Sudan Savanna
Hayatu,
Mohammed,
Kutama A. S.,
Auyo,
M. I.,
Umar S.,
M. L. Umar
Issue:
Volume 2, Issue 2, March 2014
Pages:
14-19
Received:
12 December 2013
Accepted:
Published:
20 March 2014
Abstract: Rosette has been a constraint to the production of groundnut in the existing farming system which contributes to the poor productivity of this crop. This trial was conducted in the screen-house of IITA Kano station, Nigeria to screen some groundnut varieties to rosette disease. The following parameters were measured during the trial such as chlorophyll content, plant vigor, disease incidence,50% day to flower and grain yield. The result showed that chlorophyll content of the varieties 19BT and ICGV-IS-07825 showed no significant difference in their measurement at 7 days after infestation. At 14 days 19BT, ICGV-IS-07825 and ICGV-IS-09011 measured low chlorophyll content and at 21 days after infestation the chlorophyll content of all the plants in the Trials measured slight difference. Slight difference was recorded in plant vigor for the spray Trial and the non-spray were almost the same 21 days after infestation. There was no disease incidence in the spray Trial. Four varieties 19BT, ICGV-IS-07825, ICGV-IS-08872 and ICGV-IS-09011 in the non-spray had highest disease incidence and ICGV-IS-09982 recorded least incidence. Number of first day and 50% day to flower was measured and the result showed that rosette does not have effect on flowering date of groundnut since the both Trial flowered at the same time. 19BT and ICGV-IS-08872 measured highest number in grains and pod weight. ICGV-IS-07825 and ICGV-IS-09982 measured least in number of grains and in pod weight in both Trials. It is concluded that resistance to groundnut rosette lutoevirus (GRVA) is not currently available in cultivated groundnut. More concerted effects are required where management packages can be put into proper practice.
Abstract: Rosette has been a constraint to the production of groundnut in the existing farming system which contributes to the poor productivity of this crop. This trial was conducted in the screen-house of IITA Kano station, Nigeria to screen some groundnut varieties to rosette disease. The following parameters were measured during the trial such as chlorop...
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Phylogenetic and Morphological Investigation of a Dunaliella Strain Isolated from Yuncheng Salt Lake, China
Feipeng Wang,
Jia Feng,
Shulian Xie
Issue:
Volume 2, Issue 2, March 2014
Pages:
20-26
Received:
5 April 2014
Accepted:
24 April 2014
Published:
30 April 2014
Abstract: A Dunaliella strain was isolated from Yuncheng Salt Lake, Shanxi, China (111.05°E, 35.03°N). Morphological characteristics and molecular data were used to evaluate the relationship of this algal strain to other Dunaliella strains. Morphology of the isolated strain observed was close to Dunaliella salina. Phylogenetic trees were constructed from rbcL, psaB, ITS (ITS-1+5.8S rDNA+ITS-2) and 18S rDNA sequence data. Phylogenetic analysis of the four gene sequences revealed that the isolated Dunaliella strain is closely related to D. salina (Dunal) Teodoresco, D. peircei Nicolai et Baas-Becking, D. tertiolecta Butcher and more likely closer to D. salina. Combined morphological characteristics and phylogenetic analysis, the isolated Duanliella—designated here as D. sp YC01—should be a Dunalialla salina strain.
Abstract: A Dunaliella strain was isolated from Yuncheng Salt Lake, Shanxi, China (111.05°E, 35.03°N). Morphological characteristics and molecular data were used to evaluate the relationship of this algal strain to other Dunaliella strains. Morphology of the isolated strain observed was close to Dunaliella salina. Phylogenetic trees were constructed from rbc...
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