Central Rice Research Institute Annual report...2011-12
Central Rice Research Institute Annual report...2011-12
Central Rice Research Institute Annual report...2011-12
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Legend: L- Ladder (100bp) K- Kalinga III M- Moroberekan S- Salumpikit<br />
Fig. 13. Parental polymorphism survey with SSR markers<br />
Fig. 14. Gel photo showing marker AP 5930<br />
showing confirmed (C) BC3F1 plant of<br />
Vandana/Pi2 (C 101 A 51)<br />
Fig. 15. Distribution of reaction types in the population of Kalinga<br />
III/Morobereman for blast and brown spot<br />
in nurseries during wet season 2011. Majority of the<br />
RILs showed blast resistance (Table 23) but most were<br />
susceptible to brown spot (Fig. 15) obviously due to the<br />
moderate reaction of parents to brown spot.<br />
Table 23. Range, mean and standard deviation of blast<br />
and brown spot intensity in the RILs of Kalinga III/<br />
Moroberekan<br />
P1 P2 Range Mean Std dev<br />
Bl. Score 0 4.5 0-6 1.28 1.72<br />
Bl. DLA 0 5 0-14 1.<strong>12</strong> 2.68<br />
B.sp. Score 4.9 6.4 3.0-6.8 4.99 0.79<br />
Identification of major QTLs for grain yield<br />
under drought stress in ‘Jhum’ rice varieties<br />
of North Eastern Region for use in marker<br />
assisted breeding to improve yield under<br />
drought<br />
Eighty three Jhum rice germplasm from north-eastern<br />
region were screened for drought tolerance under<br />
rain-out shelter facility. Based on leaf rolling one genotype<br />
was scored (SES) as 1, 35 genotypes as 3, 39 geno-<br />
types as 5, six genotypes as 7 and two as 9. Grain yield<br />
was negatively correlated with drought score, canopy<br />
temperature, chaffs panicle -1 (sterility) and positively<br />
correlated with grain number panicle -1 and biomass.<br />
Based on grain yield and other traits, the promising<br />
drought tolerant genotypes identified are RCPL1-<strong>12</strong>8,<br />
Bhalum 3, Berain 2 and Kataktara. Mapping population<br />
will be developed using these donors to identify<br />
the QTLs for grain yield under stress.<br />
Marker Assisted Breeding of Abiotic<br />
Stress Tolerant <strong>Rice</strong> Varieties with Major<br />
QTLs for Drought, Submergence and<br />
Salt Tolerance<br />
Introgression of DTY 2.1<br />
and DTY 3.1<br />
QTLs in<br />
Swarna-Sub1 through marker assisted<br />
backcrossing<br />
Backcross population (BC 1<br />
F 1<br />
s) of the cross Swarna-<br />
Sub1/IR81896-B-B-195 was grown during 2011 wet<br />
season. Six markers (RM324, RM521, RM6374, RM3549,<br />
RM327, RM13211) linked to QTL DTY 2.1<br />
and three markers<br />
(RM16032, RM416, RM520) linked to QTL DTY 3.1<br />
54 CRRI ANNUAL REPORT 2011-<strong>12</strong>
Change language