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 |
In India, wheat is cultivated on around 29.8 mha that produces 92.5 mt with an average productivity of 3.1 t/ha. But in recent scenario of climate change our wheat cultivars succumb to the grave problem of terminal heat stress leading to substantial reduction in its production and productivity. Sixteen genotypes of wheat were used for assessing the molecular diversity for terminal heat stress tolerance against 14 SSR markers linked to the trait of interest. Results revealed that amplified alleles ranged from185 bp to 230 bp. The maximum number of polymorphic bands was generated with primers Xgwm 484 and Xcfd 43 that resulted in 4 amplicons followed by primer Xgwm 268 that resulted in 3 amplicons. The SSR primer Xgwm 484 amplified 4 polymorphic amplicons varying from size 220bp to 230 bp. The marker Xcfd 43 detected 4 SSR alleles. The dendrogram classified sixteen genotypes into two broad groups, A and B. The two groups were generated at a similar coefficient of 0.55. Group A consisted of six genotypes and was further subdivided into three clusters. Group B consisted of ten genotypes which were further subdivided into three clusters (cluster IV, V and VI). The mean HSI, grain yield and relative reduction in grain yield under stress condition over timely sown condition was the basis of categorization of genotypes correspond to the molecular data. Genotypes, DBW90, WH1021, HD3059, JOB666, UP2843 and WH1124 have proved their suitability for late sown condition out of which the former three genotypes (DBW90, WH1021and HD3059) has already been released for late sown condition.
Citations |
 |
 |
 |
 |
