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Influence of Stomatal Characteristics on Yield and Yield Attributes of Rice

Dr. A. K. M. Golam Sarwar
Professor
Department of Crop Botany, Bangladesh Agricultural University Mymensingh-2202Bangladesh

S. M. A. Masud Rana
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Abdul Karim
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

Stomatal distribution is found to be an important trait of rice cultivars for increasing yield. A total of six rice cultivars, three from each of inbred and hybrid cultivars, were used to study stomatal distribution on the leaf epidermis and its influence on yield and yield attributing characters of rice during the Boro season. The hybrid cultivars exhibited superiority in respect of number of stomata, length and breadth of stomatal apparatus. They also produced longer panicle, higher number of filled grains panicle^–1, heavier grains and finally, higher grain yield ha^–1 than inbreds. The higher grain yield of the hybrid cultivars might be due to higher number of large sized stomata causing higher photosynthetic efficacy, although, they produced relatively lower number of effective tillers hill^–¹.

Keywords: Stomatal apparatus, Inbred, hybrid, cultivars, Boro rice

Location: Mymensingh

Start Date: 00-12-2010

End Date: 00-05-2011

Program Area: Variety and Species

Commodity: Rice

Objectives:

To study stomatal distribution on the leaf epidermis and its influence on yield and yield attributing characters of rice during the Boro season.

Methodology:

The experiment was carried out at the Field Laboratory and Plant Morphology Laboratory, Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, during the Boro season (December 2010 to May 2011). Three hybrids viz. Doyal, Moina and Tia, and three modern (inbreds) viz. BINA dhan7, BRRI dhan28 and BRRI dhan29, rice cultivars were used in this study. All these cultivars of hybrid and inbred rice were collected from Lalteer Seed Company Pvt. Ltd. The experiment was laid out following a randomized complete block design with three replications. The standard procedures for rice cultivation were followed (BRRI, 2010). The yield and yield attributing characters were studied after ripening (at least 80%) of spikelets. Matured leaves (third leaf from the top) were collected from the experimental field at the flowering stage and fixed in FAA solution (Sarwar and Ali, 2002). Preparations of epidermal layers were made by scraping of the mature leaf samples (for detail see Sarwar and Ali, 2002). Stomatal features on the leaf epidermis i.e., number, length and breadth of stomatal apparatus, were studied and measured under a compound microscope. The collected data were analyzed statistically following the analysis of variance (ANOVA) technique and the mean differences were adjudged by Duncan's New Multiple Range Test (DMRT) using the statistical computer package program MSTAT-C.

Source of Information: J. Bangladesh Agril. Univ. 11(1): 47–52, 2013, ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The stomatal characteristics viz. number, length and breadth, play an important role for higher yield in hybrid cultivars, though, they produce relatively lower number of effective tillers hill^-1. These stomatal features and the number of effective tillers in hybrids might be useful for inclusion in the future breeding programmes of rice for higher yield in Bangladesh

Knowledge Management: Journal