MAPPING QUANTITATIVE TRAIT LOCI FOR TILLERS NUMBER, PLANT HEIGHT AND THEIR CORRELATION IN RICE [Oryza sativa L.]

LINCOLN MANDAL¹*, SUNIL KUMAR VERMA², ANIL S. KOTASTHANE^3
1Department of Plant Molecular Biology and Biotechnology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh 492012, India
²Department of Genetics and Plant Breeding, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh 492012, India
³Department of Plant Pathology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh 492012, India
* Corresponding Author : lincolndbt@gmail.com

Received : 01-11-2017     Accepted : 20-11-2017     Published : 28-11-2017
Volume : 9     Issue : 10       Pages : 309 - 313
Genetics 9.10 (2017):309-313

Keywords : Rice, Tillers per plant, Plant height, QTL analysis, RILs
Conflict of Interest : None declared
Acknowledgements/Funding : We are thankful to College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh 492012, India for providing the necessary facilities.
Author Contribution : All author equally contributed

Rice (Oryza sativa L.) is a staple food for most of the world’s people. About, 122 RILs population derived from a cross Danteshwari × Dagad deshi was used to identify QTL for tillers number per plant and plant height. The normal frequency distribution was followed for both the traits tillers per plant and plant height. Correlation between tiller number and plant height was evaluated and shown significant negative correlation, which means that dwarf plant having more tiller as compare to tall plant. A total of four QTLs were identified for tillers per plant and two for plant height using QTL cartographer 2.5 on chromosomes 1 and 3, respectively. The “qTN1.1” and “qTN3.1” for tiller number per plant on chromosomes 1 and 3, respectively. The both QTLs for tillers number per plant “qTN1.1” and “qTN3.1” showed positive additive effect, means that alleles from the parent Danteshwari acted to increase the measured trait tiller number per plant. Two significant major QTLs, “qPH1.1” and “qPH1.2” also mapped for plant height on chromosomes 1, with very high phenotypic variance of 53.97 and 46.29%, respectively. The QTL, “qPH1.1” for plant height found between marker RM3825 and HvSSR1-87 exactly co-localized the “qTN1.1” of tillers number per plant on chromosome 1. Both the negatively correlated traits tightly linked and present on same loci, showing linkage drag. The “qTN1.1” and “qTN3.1” could be useful for the improvement of plant type by pyramiding via. marker-assisted selection as tiller number a key component of grain yield.

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