Central Rice Research Institute Annual report...2011-12
Central Rice Research Institute Annual report...2011-12
Central Rice Research Institute Annual report...2011-12
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jected to different levels of sodium chloride solution<br />
(Fig. <strong>12</strong>), however, the C δ value at high salinity environment<br />
shows indication of C 4<br />
ness of S. fruticosa (Table<br />
19).<br />
One month old seedlings of the same germplasm<br />
accessions were exposed to vegetative stage moisture<br />
stress under field condition with similar checks as that<br />
of seedling stage stress. Soil moisture content varied<br />
from 2.6 to 9.7% under 30 cm soil depth with soil moisture<br />
tension of more than 60 kPa. Leaf death score was<br />
Control <strong>12</strong> ds m -1 18 ds m -1<br />
24 ds m -1 30 ds m -1 36 ds m -1<br />
Fig. <strong>12</strong>. Anatomy of S. fruticosa under different salinity level<br />
Table 19. C δ value of Suaeda fruticosa subjected to different salinity levels<br />
C<br />
δ value<br />
control <strong>12</strong> ds m -1 18 ds m -1 24 ds m -1 30 ds m -1 36 ds m -1<br />
Suaeda fruticosa 14.543 16.721 15.<strong>12</strong>5 14.659 13.876 8.698<br />
Phenomics of moisture deficit and low<br />
temperature stress tolerance in rice<br />
Fifteen days old seedlings of 525 germplasm accessions<br />
were exposed to seedling stage/ early vegetative<br />
stage moisture stress under field condition with four<br />
blocks and five checks (tolerant and susceptible). Soil<br />
moisture content was 2.38 to 11.20% and soil moisture<br />
tension was 50- 60 kPa during the stress period under<br />
15 cm soil depth. Leaf death score was recorded following<br />
IRRI SES ‘0’ to ‘9’scale. Out of 525 entries, 37 entries<br />
were observed to be tolerant with drought and recovery<br />
score SES ‘1’, 33 as moderately tolerant with SES score<br />
‘3’, 108 relatively less tolerant with SES score ‘5’, 236<br />
with SES score ‘7’ and 111 as susceptible with SES<br />
score ‘9’. The tolerant checks (Vandana, Vanaprabha,<br />
Salumpikit and CR143-2-2) performed better with SES<br />
score ranging between ‘1-5’, whereas susceptible check<br />
(IR20) was observed with SES score in the range of ‘7-9’.<br />
recorded when most of the entries showed leaf rolling<br />
symptom and the score was taken following IRRI SES<br />
‘0’ to ‘9’scale. Out of 525 entries, 75 entries were observed<br />
to be highly tolerant with drought and recovery<br />
score SES ‘1’ followed by 188 as moderately tolerant<br />
with SES score ‘3’, 92 relatively less tolerant with SES<br />
score ‘5’, 134 with SES score ‘7’ and 36 as susceptible<br />
with SES score ‘9’. The tolerant checks performed better<br />
with SES score ranging between ‘1-5’, whereas susceptible<br />
check (IR-20) was observed with SES score in<br />
the range of ‘7-9’.<br />
Bioprospecting and Allele Mining<br />
Against Abiotic Stresses<br />
Phenotyping under salt stress and genotyping<br />
using QTL linked markers<br />
A total of 825 lines were sown at CRRI and thirty<br />
day old seedlings were transplanted in the field at<br />
50 CRRI ANNUAL REPORT 2011-<strong>12</strong>
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