NDLI: Tagging quantitative trait loci associated with grain yield and root morphological traits in rice (Oryza sativa L.) under contrasting moisture regimes

Content Provider	Springer Nature Link
Author	Venuprasad, R. Shashidhar, H.E. Hittalmani, S. Hemamalini, G.S.
Copyright Year	2002
Abstract	Plant breeding for drought-prone habitats envisages a favorable combination of grain yield and drought resistance. Though several components enhancing drought resistance have been identified in rice,their association with grain yield, under low-moisture stress, has been established in very few instances. We attempt to study the associations between rice grain yield and root system parameters both at phenotypic and genotypic levels. The doubled haploid population of IR64/Azucena was evaluated for root related traits at peak vegetative stage and grain yield related traits under both low-moisture stress and non stress conditions. ‘Mean environment’ was computed for yield related traits. Correlation and QTL mapping was attempted to find out the associations. The correlation between maximum root length and grain yield was positive under stress and negative in non stress. Genotypes with thicker and deeper roots, manifested higher biomass and grain yield under stress. Only one QTL found to increase days to flowering in non stress was also found to influence root volume and dry weight negatively under stress. The study suggests that loci enhancing grain yield and related traits were not pleiotropic with loci for desirable root morphological traits studied under low-moisture stress at vegetative stage, in the genetic material used in the study. It is thus possible to combine higher grain yield and desirable root morphological traits, favorably, to enhance productivity of rice under low-moisture stress. In rainfed ecologies, where deep roots contribute to enhanced drought resistance in rice, the results indicate the possibility of combining drought resistance with higher levels of grain yield.
Starting Page	293
Ending Page	300
Page Count	8
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	128
Issue Number	3
e-ISSN	15735060
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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Molecular marker assisted tagging of morphological and physiological traits under two contrasting moisture regimes at peak vegetative stage in rice (Oryza sativa L.)

Identification of most important rice root morphological markers in response to contrasting moisture regimes under vegetative stage drought

RELATIONSHIP OF ROOT TRAITS WITH GRAIN YIELD IN RICE (Oryza sativa L.) UNDER VARIOUS WATER REGIMES

RELATIONSHIP OF ROOT TRAITS WITH GRAIN YIELD IN RICE (Oryza sativa L.) UNDER VARIOUS WATER REGIMES

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