2023 Vol. 29 No.1 PP 03-10
https://doi.org/10.33451/florafauna.v29i1pp03-10
Quantification of 2-acetyl-1-pyrroline in joha rice and it’s correlation with agromorphological characters with special reference to upper Brahmaputra valley,Assam, India
*Pranit Saikia1, Bijoy Neog2, Bristy Borgohain2, Dibyojyoti Baruah2, Nabajyoti Gogoi3, Aandrisha Borthakur2 and Ankur Gogoi4
1Centre for Biotechnology and Bioinformatics,
2Department of Life Sciences,
Dibrugarh University,
DIBRUGARH-786004 (ASSAM) INDIA
3VRDL, Fakhruddin Ali Ahmed Medical College and Hospital,
BARPETA-781301 (ASSAM) INDIA
4MediTree Clinic and Diagnostic Centre LLP
GOLAGHAT-785621 (ASSAM) INDIA
*Corresponding Author :
E-mail: pranitsaikia@dibru.ac.in
ABSTRACT
Joha rice belongs to aromatic landraces, endemic to Assam and are distinct from other aromatic rice in terms of texture,
aroma and cooking quality. 2-Acetyl-1-pyrroline (2AP) is one of the major volatile compounds which contribute to fragrance in
aromatic rice. However, the relationship between aroma and low yield have challenged rice breeders to develop other agronomic
characters to gain a better yield grain. In this study, 15 joha landraces from different districts of Assam were evaluated for the
accumulation of 2AP in the grain along with 52 agro-morphometric characters. Highest 2AP was observed in Dangor Joha
(78.667 μg/kg) followed by Kolakunkuni Joha (64.615 μg/kg) and Joha Bora (52.715 μg/kg). Ranikajol Joha showed the lowest
accumulation of 2AP in its grain (14.465 μg/kg). Correlation analysis revealed that pubescence of blade surface (r=0.665), width
of blade (r=0.57) and density of pubescence of lemma (r=0.509) have positive contribution to 2AP accumulation. Number of
panicles per plant have a negative correlation with 2AP (r=-0.26) suggesting that 2AP affects the yield of grain negatively.
Therefore, morphological trait such as anthocyanin or colouration in leaf/lemma-palea or high density of pubescence in leaf and
lemma would be a potential breeding criterion for selecting joha rice with higher 2AP content.
KEY WORDS : 2-Acetyl-1-pyrroline, Aromatic rice, Correlation, Joha, Landraces, Morphological traits