Association between QTLs and morphological traits toward sheath blight resistance in rice (Oryza sativa L.)

Md Kamal Hossain, Kshirod Kumar Jena, Md Atiqur Rahman Bhuiyan, R Wickneswari V Ratnam

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Sheath blight is considered the most significant disease of rice and causes enormous yield losses over the world. Breeding for resistant varieties is the only viable option to combat the disease efficiently. Seventeen diverged rice genotypes along with 17 QTL-linked SSR markers were evaluated under greenhouse conditions. Pearson’s correlation showed only the flag leaf angle had a significant correlation with sheath blight resistance under greenhouse screening. Multivariate analysis based on UPGMA clustering and principal component analysis (PCA) indicated that the flag leaf angle, flag leaf length, and plant compactness were significantly associated with the following SSR marker alleles: RM209 (116,130), RM202 (176), RM224 (126), RM257 (156), RM426 (175), and RM6971 (196), which are linked to the SB QTLs: QRlh11, qSBR11-3, qSBR11-1, qSBR9-1, qShB3-2, and qSB-9. A Mantel test suggested a weak relationship between the observed phenotypes and allelic variation patterns, implying the independent nature of morphological and molecular variations. Teqing and Tetep were found to be the most resistant cultivars. IR65482-4-136-2-2, MR219-4, and MR264 showed improved resistance potentials. These results suggest that the morphological traits and QTLs which have been found to associate with sheath blight resistance are a good choice to enhance resistance through pyramiding either 2 QTLs or QTLs and traits in susceptible rice cultivars.

Original languageEnglish
Pages (from-to)613-626
Number of pages14
JournalBreeding Science
Volume66
Issue number4
DOIs
Publication statusPublished - 2016

Fingerprint

blight
quantitative trait loci
Oryza sativa
rice
leaf angle
Plant Leaves
Principal Component Analysis
Breeding
Cluster Analysis
greenhouses
Multivariate Analysis
Alleles
Genotype
Phenotype
cultivars
multivariate analysis
principal component analysis
Oryza
screening
alleles

Keywords

  • Association
  • Morphological traits
  • QTLs
  • Resistance
  • Sheath blight
  • SSR markers

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

Cite this

Association between QTLs and morphological traits toward sheath blight resistance in rice (Oryza sativa L.). / Hossain, Md Kamal; Jena, Kshirod Kumar; Bhuiyan, Md Atiqur Rahman; V Ratnam, R Wickneswari.

In: Breeding Science, Vol. 66, No. 4, 2016, p. 613-626.

Research output: Contribution to journalArticle

Hossain, Md Kamal ; Jena, Kshirod Kumar ; Bhuiyan, Md Atiqur Rahman ; V Ratnam, R Wickneswari. / Association between QTLs and morphological traits toward sheath blight resistance in rice (Oryza sativa L.). In: Breeding Science. 2016 ; Vol. 66, No. 4. pp. 613-626.
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