Marker-assisted selection for sheath blight resistance in rice (Oryza sativa L.)
Sheath blight is one of destructive diseases of rice, causing substantial loss to rice production. Developing resistant cultivars to sheath blight is quite difficult due to lack of effective resistant source in the available germplasm. Pyramiding of gens/QTLs for different biotic stresses gives broad-spectrum resistance to multiple diseases for any crop.The present study was carried out to introgress sheath blight resistant QTL, qSBR11-1, into the backgrounds of CB14004 and CB14002 from the donor parent Tetep. CB14004 and CB14002 are the two bacterial blight resistant genotypes, pyramided with three bacterial blight resistant genes viz.,xa5, xa13 and Xa21. The positive plants of BC3F1 individuals for sheath blight QTL i.e., qSBR11-1were self-pollinated to generate BC3F2 individuals. The BC3F2 individuals were screened with linked molecular marker of qSBR11-1 i.e., RM 224 and the confirmed plants were assessed for morphological traits to identify the superior segregates.
It is certified that:
- The corresponding author is fully responsible for any disputes arising due to the publication of his/her manuscript.
- The article has been seen by all the authors who are satisfied with its form and content.
- The sequence of names of authors in the by-line is as per their relative contribution to this experiment, giving due credit to all scientists who made notable contribution to it.
- All the authors fully understand that inclusion of any other co-authors or exclusion of any co-authors is not possible once the article has been submitted to the journal.
- The corresponding author takes full responsibility for this article.
- The address of the organization where the research was conducted is given.
- The article is exclusive for this journal, and the results reported here have not been sent (and will not be sent during its consideration by this journal) for publication in any other journal.
- Authors agree to abide by the objective comments of referees and do agree to modify the article into a short note as per the recommendation, for publication in the Electronic Journal of Plant Breeding.
- If published in Electronic Journal of Plant Breeding, the copyright of this article would vest with the Indian Society of Plant Breeders, who will have the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in it, and neither we nor our legal heirs will have any claims on royalty.