National Academy of Agricultural Sciences (NAAS)
|
PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Drought is one of the major abiotic stress that limits rice production in Assam, India. A traditional drought tolerant local cultivar ‘Banglami’ was crossed with a high yielding rice variety ‘Ranjit’ and 180 F2 plants were raised. The 110 polymorphic SSR markers were used for genotyping of F2 plants. Out of which, 88 fitted the expected Mendelian segregation, whereas 22 (20.0%) significantly deviated from it (P<0.01). Only 89 SSR markers could be assigned to 12 linkage groups covering a total of 1628.7 cM of the genome. The 120 F2:4 lines were evaluated for various yield traits under drought stress and irrigated conditions. A total of 11 QTLs were identified for grain yield and its component traits with the phenotypic variation ranging from 0.04% to 84% under both hydrological conditions. The QTL for effective booting tillers remained consistent on chromosome 6 under both conditions. The clustering of QTLs was observed for panicle length, number of chaff per panicle and spikelet fertility at the marker interval of RM253-RM30 on chromosome 6. Thus with further fine mapping of these region, it may be possible to tightly tag the QTLs for precise introgression in MAB. The two improved advanced lines (B-42 and B-106) were selected based on yield and grain quality traits under drought stress for development of drought tolerant rice variety in elite genetic background.
Citations |
 |
 |
 |
 |
