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Evaluation Of Rice Germplasm For Yield Traits And Amylose Content Under Drought Stress
Tuesday, 2020/03/24 | 08:06:31

P.T.T. HA, N.T.T. NGUYEN1, D.T.N. LINH, N.T. LANG and B.C. BUU

 

SABRAO Journal  of  Breeding and Genetics 52 (1): 64-74, 2020 (accepted: February 28, 2020.)

 

A set of 44 rice cultivars were evaluated for yield traits and amylose content under controlled  reproductive  stage  drought.  Drought  tolerance  indices  viz.,  leaf  rolling, leaf drying, levels of drought tolerance were measured. For leaf rolling, 38 cultivars showed  0  to  3  score.  Forty  cultivars  showed  scores  between  0-2  for  leaf  Twenty cultivars have shown drought tolerance scores of 0 -3Six cultivars IR75499-73-1-B, V3M-92-1, IR75499-21-1-B, V3M-109-2, IR78997-B-16-B-B-B-SB2, IR78948-B-21-B-B-B  could  be  selected  for  drought  tolerance  and  leaf  rolling,  leaf  drying  with drought  score  of  0-1.  These  cultivars  were  expected  to  provide  higher  yield components. The range of yield decline was 10.61g/cluster to 26.06 g/cluster under

 

water  stress  condition.  Four  cultivars  with  combined  drought  tolerance,  high  yield and  good  quality  under  reproductive-stage  drought  stress,  the  drought-tolerant cultivars  (V3M-92-1,  IR78997-B-16-B-B-B-SB2,  IR75499-73-1-B,  and  IR78948-B-21-B-B-B)  were  identified  in  this  study  which  could  be  further  deployed  in  rice breeding programs.

 

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