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Articles by S. Boontang
Total Records ( 2 ) for S. Boontang
  S. Boontang , P. Songsri , S. Jogloy , C. Akkasaeng , N. Vorasoot , N. Tantisuwichwong and A. Patanothai
  Objective of this study was to investigate whether physiological traits related to drought tolerance can correctly identify the peanut genotypes with high yield under water-limited conditions. Seven released cultivars and two drought tolerant lines were arranged in a split plot design with four replications for two years. The two water regimes (field capacity; FC and 2/3 available water; 2/3 AW.) were assigned in main plots and peanut genotypes were assigned in subplots. The data were recorded for SPAD Chlorophyll Meter Reading (SCMR), Specific Leaf Weight (SLW), biomass, pod yield, harvest index (HI), number of mature pods, shelling percentage, 100-seed weight and number of seeds per pod. SLW and SCMR could effectively identify peanut cultivars with higher pod yield under water-limited conditions. KK 60-3, KKU 72-1 and KKU 60 were identified as drought tolerant because they had SCMR and SLW, which were similar to those of ICGV 98324 and ICGV 98308. KK 60-3 had high biomass under water limited conditions because of high potential but it had poor pod yield, whereas KKU 60 had the highest pod yield and HI. KKU 60 also had the highest pod yield under well-watered conditions. The results indicated that some released cultivars had degree of drought tolerance similar to or better than that of the drought tolerant lines. The improvement of peanut cultivars for drought tolerance can be site-specific.
  S. Boontang , T. Girdthai , S. Jogloy , C. Akkasaeng , N. Vorasoot , A. Patanothai and N. Tantisuwichwong
  The use of the surrogate traits with simple inheritance as selection criteria for drought tolerance should speed up the selection programs. The objectives of this study were to investigate the responses of released cultivars of peanut to end of season drought for traits related to drought tolerance and agronomics traits and to identify the released cultivars with tolerance to end of season drought. Ten peanut genotypes and two water regimes (field capacity; FC and 1/3 available water; 1/3 AW) were laid out in a split plot design with four replications for two years. The data were recorded for SPAD chlorophyll meter reading (SCMR), Specific leaf weight (SLW), biomass, pod yield, harvest index (HI), number of mature pods, 100-seed weight and number of seeds per pod. Drought increased SCMR and SLW and reduced biomass production, pod yield and seed size, whereas harvest index and number of pods per plants were not significantly affected. Maintaining high pod yield and number of pods per plant depended solely on high potential under well-watered conditions, whereas maintaining high biomass production and seed size and harvest index was dependent on both high potential and low reduction. SCMR and SLW were well associated and they had high correlations with biomass and pod yield. SCMR seemed to be more stable than SLW and it is recommended to be used as a surrogate trait for drought tolerance in peanut. The released cultivar KKU 60 was identified as drought tolerant by SCMR and SLW and by pod yield.
 
 
 
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