Characterization of Oryza nivara introgression lines: A potential prebreeding resource to improve net photosynthetic rate in elite cultivars of rice

G.  HARITHA; T.  VISHNUKIRAN; Y.  RAO; CH. GOWTHAMI; B.  DIVYA; N.  SARLA; D.  SUBRAHMANYAM

doi:10.32615/ps.2019.003

Photosynthetica (Jan 2019)

Characterization of Oryza nivara introgression lines: A potential prebreeding resource to improve net photosynthetic rate in elite cultivars of rice

G. HARITHA,
T. VISHNUKIRAN,
Y. RAO,
CH. GOWTHAMI,
B. DIVYA,
N. SARLA,
D. SUBRAHMANYAM

Affiliations

G. HARITHA: Indian Institute of Rice Research (ICAR), Rajendranagar, Hyderabad - 500 030, India
T. VISHNUKIRAN: Indian Institute of Rice Research (ICAR), Rajendranagar, Hyderabad - 500 030, India
Y. RAO: Indian Institute of Rice Research (ICAR), Rajendranagar, Hyderabad - 500 030, India
CH. GOWTHAMI: Indian Institute of Rice Research (ICAR), Rajendranagar, Hyderabad - 500 030, India
B. DIVYA: Indian Institute of Rice Research (ICAR), Rajendranagar, Hyderabad - 500 030, India
N. SARLA: Indian Institute of Rice Research (ICAR), Rajendranagar, Hyderabad - 500 030, India
D. SUBRAHMANYAM: Indian Institute of Rice Research (ICAR), Rajendranagar, Hyderabad - 500 030, India

DOI: https://doi.org/10.32615/ps.2019.003
Journal volume & issue: Vol. 57, no. 1
pp. 47 – 60

Abstract

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Photosynthesis is one of the fundamental processes influencing crop growth and productivity. In order to understand better the basis of variation in net photosynthetic rate (PN) and yield potential in rice, two backcross populations derived from Swarna × O. nivara were studied. Gas exchange and chlorophyll fluorescence measurements were taken at flowering stage and data on yield traits at harvest. PN was significantly correlated with stomatal conductance, transpiration rate, mesophyll conductance, carboxylation efficiency, yield per plant (YLDP), and dry mass in both populations. Ten introgression lines (ILs) showed higher PN than their parents. IL 230S showed highest PN with increased YLDP than the remaining ILs. Single marker analysis showed RM514 and RM48 was positively associated with PN and YLDP in popA, whereas RM204 and RM122 in popB. The first 4 principal components contributed 92 and 93% to the total genetic variation in each population, respectively.

fluorescence; introgression lines; oryza nivara; photosynthesis; single marker analysis; yield.

Published in Photosynthetica

ISSN: 0300-3604 (Print); 1573-9058 (Online)
Publisher: Academy of Sciences of the Czech Republic, Institute of Experimental Botany
Country of publisher: Czechia
LCC subjects: Science: Botany
Website: https://ps.ueb.cas.cz/

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