International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 6
First page : (1441) Last page : (1449)
Article doi: http://dx.doi.org/10.18782/2320-7051.5449

Phenology Based Biomass Accumulation and Partitioning Indices in Relation to Water Stress in Common Bean (Phaseolus vulgaris L.)

Parvaze A. Sofi*, Khalid Rehman, Musharib Gull and Asmat Ara
Division of Genetics & Plant Breeding, Faculty of Agriculture, SKUAST-K, 193201, J&K
*Corresponding Author E-mail: parvazesofi@gmail.com
Received: 15.08.2017  |  Revised: 23.09.2017   |  Accepted: 27.09.2017  

 ABSTRACT

In the present study, phenology based biomass partitioning indices were used to identify genotypes tolerant to water stress by evaluating 20 common bean lines in green house and field under water stressed and well watered conditions. Invariably shoot biomass and shoot to total biomass were higher under irrigated conditions as compared to their corresponding values under drought and vice versa in case of root biomass and root to total biomass. Shoot biomass and shoot to total biomass decreased under drought, whereas, root biomass and root to total biomass increased under drought. Among biomass partitioning indices, DSF was negatively correlated with seed yield while as rest all indices BGR, SGR, EGR and RSS were positively correlated with seed yield under both water stressed and well watered conditions. Highest values of correlation of indices with seed yield under water stressed and well watered conditions were recorded for EGR (r = 0.981** and 0.963** respectively) followed by SGR (r = 0.978** and 0.953** respectively) and RSS (r = 0.881** and 0.711** respectively), while as BGR had lower values of correlation coefficient. The principal component analysis could identify three PCs based on Eigen values (Table 4) accounting for about 88 % variation. The Eigen values for PC1, PC2 and PC3 were 4.853, 2.556 and 1.425 respectively.  In PC1, SGR, EGR, RSS and seed yield were important, while as in case of PC2, most of the traits were negative except shoot biomass. Genotypes WB-1634, WB-341 and WB-185 were identified as tolerant and WB-6 and WB-1587 as susceptible to water stress. Since crop phenology is very important in determining ability of genotypes to respond to water stress, it is suggested that these indices can be used in combination with other yield based indices to identify genotypes that are tolerant to water stress.

Key words: Common bean, Water Stress, Phenology, Biomass partitioning, Growth rate

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Sofi, P.A., Rehman, K., Gull, M. and Ara, A., Phenology Based Biomass Accumulation and Partitioning Indices in Relation to Water Stress in Common Bean (Phaseolus vulgaris L.), Int. J. Pure App. Biosci.5(6): 1441-1449 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5449