Evaluation of morpho-physiological traits of MRQ74 pyramided lines with drought yield QTLs

Asmuni Mohd Ikmal, Zainuddin Nurasyikin, Arvind Kumar, Noraziyah Abd Aziz Shamsudin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Drought regularly affects rainfed lowland and upland rice ecosystems in Malaysia. Three drought yield QTLs, viz qDTY2.2, qDTY3.1 and qDTY12.1 successfully pyramided into MRQ74 to increase its yield under reproductive stage drought stress (RS). Forty-eight genotypes comprising 39 pyramided lines (PLs) with different qDTYs combinations, four parents including MRQ74 (recipient) and five checks were evaluated for morpho-physiological traits under RS and non-stress (NS). This study aims to determine which traits influenced by individual qDTY and qDTY combinations and to gain better understanding of QTL interactions in enhancing grain yield (GY) under RS. Results showed plant height, number of panicles, root length, root weight, relative water content and 100-grain weight increased while chlorophyll content and GY decreased under RS compared to NS. No significant difference was observed in days to flowering, leaf rolling and grain length between selected PLs and MRQ74 under RS. Six PLs with yield advantage (YA) of 208.17–1751.63 kg ha−1 compared to MRQ74 in RS but yielded similar to MRQ74 under NS were further selected. Under RS, qDTY class analysis showed qDTY12.1 individually and combination qDTY12.1 + qDTY2.2 produced the highest yield of 1521.77 and 1092.30 kg ha−1 respectively. qDTY12.1 as single or combination with other qDTY is the best qDTY in stabilizing GY under RS. PL-77 with qDTY12.1 is the best PL with YA of more than 1100 kg ha−1 compared to MRQ74 in both RS and NS conditions can be recommended for cultivation in normal and drought-prone areas.

Original languageEnglish
Article number98
JournalEuphytica
Volume214
Issue number6
DOIs
Publication statusPublished - 1 Jun 2018

Fingerprint

Droughts
quantitative trait loci
drought
grain yield
Weights and Measures
Malaysia
Chlorophyll
leaf rolling
Ecosystem
Genotype
lowlands
highlands
water stress
inflorescences
Water
flowering
water content
chlorophyll
rice
ecosystems

Keywords

  • Drought
  • Drought yield QTLs
  • Grain yield
  • Pyramided lines

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science
  • Horticulture

Cite this

Evaluation of morpho-physiological traits of MRQ74 pyramided lines with drought yield QTLs. / Mohd Ikmal, Asmuni; Nurasyikin, Zainuddin; Kumar, Arvind; Abd Aziz Shamsudin, Noraziyah.

In: Euphytica, Vol. 214, No. 6, 98, 01.06.2018.

Research output: Contribution to journalArticle

Mohd Ikmal, Asmuni ; Nurasyikin, Zainuddin ; Kumar, Arvind ; Abd Aziz Shamsudin, Noraziyah. / Evaluation of morpho-physiological traits of MRQ74 pyramided lines with drought yield QTLs. In: Euphytica. 2018 ; Vol. 214, No. 6.
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