Diversity Analysis and Core Subset Establishment of Hyacinth Bean Collection in Bangladesh | Chapter 1 | Current Research Progress in Agricultural Sciences Vol. 8

Considering current and future climate possible variations Screening of resistant germplasm is fundamental for continuous and sustainable production. Plant Genetic Resource Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh, maintained 484 hyacinth bean (Lablab purpureus L.) accessions. Considering a core collection strategy, the accessions were stratified into two groups based on vine colors: green and purple. The maximum genotypes of the collection were of green vine. Each of the two subgroups was divided into three groups according to colors of pod i.e., green, white and red. Each group again divided itself into two according to beak position as central and marginal of pod. Strategically, a core subset consisting of 36 accessions out of 484 accessions was determined. Analysis of these 36 accessions showed a distribution of vine colors, flower and pod colors, pod curvature and beak position on pod with substantial variation in the collection. Shannon Diversity Index also revealed high phenotypic diversity in vine and pod characters. High diversities were found for pod curvature and beak position. They were estimated in quantitative characters of inflorescence and pod characters. Diversity Indices of different characters of the core accessions were of equal or higher magnitudes to the respective characters of the base collection indicating the better representation of the core to the original collection.

 

Author (s) Details

 

Md. Nazirul Islam
Regional Horticultural Research Station, Narsingdi, Bangladesh.

 

M. Z. Rahman
Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh.

 

R. Ali
Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh.

 

A. K. Azad
Bangladesh Agricultural Research Council, Dhaka, Bangladesh.

 

M. K. Sultan
Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh.

 

Please see the book here:- https://doi.org/10.9734/bpi/crpas/v8/1368

Critical Study of the Diversity and Abundance of Nematodes in Pollution Prone Urban and Rural Areas of Thiruvananthapuram District in Kerala, South India | Chapter 10 | International Research in Environment, Geography and Earth Science Vol.3

 Nematodes represent a very abundant group of soil organisms in the food web and are important for

soil quality. In the present study, the diversity of nematodes in the soils of urban and rural areas of
Thiruvananthapuram District was noted and their densities calculated. Different categories of land use
areas (coastal area, sewage disposal area, industrial area, road-side area, agricultural area, gasoline
station area and market area) in rural and urban parts of Thiruvananthapuram District receiving
different types of contaminants were selected after conducting a reconnaissance survey. Control
stations which are in a benign environment were also identified in both rural and urban areas of
Thiruvananthapuram District in Kerala, South India. Soil samples were collected in pre-monsoon,
monsoon and post-monsoon seasons during the period April 2009 to January 2010 from the selected
stations. The soil nematodes were identified and their abundance calculated following standard
procedures. The results showed that the soils in the market area are having the highest nematode
abundance and diversity index. It was also noted that the nematodes were scarce in the soils of
gasoline station area contaminated with hazardous wastes and chemicals which will unfavorably
affect the nematode population. The nematode abundance in the soils of the study stations are in the
order: market area > sewage disposal area > agricultural area > benign environment > industrial area
> road-side area > gasoline station area > coastal area. The present study showed that the
nematodes can act as bioindicators of pollution as their numbers diminished in contaminated soils.

Author(s) Details

Dr. K. S. Lakshmy
Department of Environmental Sciences, University of Kerala, Karyavattom P.O. Thiruvananthapuram,PIN– 695581, Kerala,
India.

Prof. (Dr.) D. S. Jaya
Department of Environmental Sciences, University of Kerala, Karyavattom P.O., Thiruvananthapuram, PIN– 695581, Kerala,
India

C. Mohandas
Central Tuber Crops Research Institute, Sreekaryam, Thiruvananthapuram-695017, Kerala, India.

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