The development of potential drought- and salinity- tolerant rice (Oryza sativa L.) through heterosis breeding

Rohayu Ma’arup, . and Muhammad Nurshafiq Azlan, . and Noor Rashidah Md Rashid, . and Nurul Athirah Karim, . The development of potential drought- and salinity- tolerant rice (Oryza sativa L.) through heterosis breeding. pp. 78-90. ISSN 2672-7226

Climate change and extreme conditions significantly reduce rice production. In order to improve food security in Malaysia the development of high-yielding rice varieties with drought and salinity tolerance are of utmost importance. In this study F‚� hybrids were developed using MR263 and MR219 (high-yielding rice) and IURON 6 IURON 14 IURON 18 and IURON 21 (upland rice) as female parents with drought-tolerant variety Dular and salinity-tolerant variety Pokkali as male parents to generate different F‚� hybrid combinations in the field. The F‚� phenotyping screening was done based on the diameter of the stomata opening chlorophyll content plant height length of flag leaf diameter of flag leaf length of seeds and width of seeds. Significant differences (p 0.05) were observed for most traits when F‚� hybrids were compared with parental cultivars indicating the deployment of drought- and salinity-tolerant genes from the male parents. A significantly (p 0.05) smaller stomata opening at midday with a high grain width compared with the female plant (MR263) and high grain length compared with the male plant (Pokkali) were observed in F‚� hybrids M(i-iii) and M(iv). The development of doubled haploid plants is currently ongoing thus would reduce cultivar development time.

Full text available from: Official URL: http://jssm.umt.edu.my/wp-content/uploads/sites/51...

Abstract

Climate change and extreme conditions significantly reduce rice production. In order to improve food security in Malaysia the development of high-yielding rice varieties with drought and salinity tolerance are of utmost importance. In this study F‚� hybrids were developed using MR263 and MR219 (high-yielding rice) and IURON 6 IURON 14 IURON 18 and IURON 21 (upland rice) as female parents with drought-tolerant variety Dular and salinity-tolerant variety Pokkali as male parents to generate different F‚� hybrid combinations in the field. The F‚� phenotyping screening was done based on the diameter of the stomata opening chlorophyll content plant height length of flag leaf diameter of flag leaf length of seeds and width of seeds. Significant differences (p 0.05) were observed for most traits when F‚� hybrids were compared with parental cultivars indicating the deployment of drought- and salinity-tolerant genes from the male parents. A significantly (p 0.05) smaller stomata opening at midday with a high grain width compared with the female plant (MR263) and high grain length compared with the male plant (Pokkali) were observed in F‚� hybrids M(i-iii) and M(iv). The development of doubled haploid plants is currently ongoing thus would reduce cultivar development time.

[error in script]

Item Type:	Article
AGROVOC Term:	Oryza sativa
AGROVOC Term:	Rice
AGROVOC Term:	Plant breeding
AGROVOC Term:	Heterosis breeding
AGROVOC Term:	Screening tests
AGROVOC Term:	High yielding varieties
AGROVOC Term:	Upland rice
AGROVOC Term:	Female parents
AGROVOC Term:	Drought tolerance
AGROVOC Term:	Salt tolerance
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9206

Actions (login required)

View Item