Evaluation of castor parental lines for drought stress tolerance: EVALUATION OF CASTOR PARENTAL LINES FOR DROUGHT STRESS TOLERANCE

P LAKSHMAMMA; T MANJUNATHA; LAKSHMI PRAYAGA; C LAVANYA; S SENTHILVEL; K ALIVELU

doi:10.56739/260fws47

Authors

P LAKSHMAMMA ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad-500 030, Telangana
T MANJUNATHA ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad-500 030, Telangana
LAKSHMI PRAYAGA ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad-500 030, Telangana
C LAVANYA ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad-500 030, Telangana
S SENTHILVEL ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad-500 030, Telangana
K ALIVELU ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad-500 030, Telangana

https://doi.org/10.56739/260fws47

Keywords:

Castor, Drought stress tolerance, Parental lines

Abstract

Twelve (12) castor parental lines along with 2 checks (48-1, DCH-519) were sown in the field during November, 2020-21 and 2021-22, water stress was imposed from 30-90 DAS along with irrigated control in split plot design with three replications. Crop growth before relieving stress (BRS) viz., plant height, stem girth, branch production and primary spike growth were affected with drought stress. Reduction in spike length, effective spike length (ESL), capsule number, spike weight, seed weight of primary and secondary spikes with drought stress was observed. Very few genotypes produced tertiary spikes during both the years. Genotypes ICS-164 and 1932-1 recorded high seed yield both in control and drought stress. Along with these two, ICS-200, ICS-299, IPC-42, DPC-9 and 48-1 also recorded less % reduction in seed yield due to drought stress with low drought susceptibility index (DSI) values.

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Evaluation of castor parental lines for drought stress tolerance