QTLs for Spikelet, Panicle and Grain Numbers in Rice (Oryza sativaL) : A Review

Authors

  • Morvarid Rezaei nia  M.S.C, Student, Department of Plant Breeding and biotechnology collage of agriculture. University of zabol. Zabol. Iran
  • DA-Khammari  M.S.C, Student, Department of Plant Breeding and biotechnology collage of agriculture. University of zabol. Zabol. Iran
  • MA-Mohammad Khani  M.S.C, Student, Department of Plant Breeding and biotechnology collage of agriculture. University of zabol. Zabol. Iran
  • MU-Khammari  M.S.C, Department of geographic and urban planning collage of human sciences. University of zahedan. Zahedan. Iran

Keywords:

QTL, Panicle, Grain number, spikelet, Oryza sativa

Abstract

Rice spikelets are borne on the branches of an inflorescence known as a panicle. The weight of an individual rice grain for a cultivar is almost constant. Consequently, yield improvements in a rice cultivar are always associated with an increase in grain number per unit ground area. Understanding the relationship between the number of spikelets when they differentiate and the number of grains at harvest is important in understanding the basis of high yield in rice. Effective panicle number, grain number, and grain weight are the three components of rice yield, of which grain number shows the highest variation and makes the largest contribution to yield output. Rice panicle number per plant is a grain yield component that directly influences rice yield. The identification of the genes controlling panicle number will play a vital role in high -yield rice breeding. Studies on QTL of panicle number in rice are limited to morphological description and primary mapping. Rice grain number is quantitatively inherited and a great deal of quantitative trait locus (QTL) mapping for grain number have been conducted using various mapping populations. Panicle morphology and grain number are influenced by the development of the panicle main axis, primary and secondary branches, spikelet development, and developmental phase transitions. Grain number is linearly correlated with total plant N content.

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International Journal of Scientific Research in Science and Technology

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Published

2016-04-30

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Volume 2, Issue 2, March-April-2016

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Research Articles

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[1]
Morvarid Rezaei nia, DA-Khammari, MA-Mohammad Khani, MU-Khammari, " QTLs for Spikelet, Panicle and Grain Numbers in Rice (Oryza sativaL) : A Review, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 2, Issue 2, pp.140-144, March-April-2016.