Chief EditorV. Geethalakshmi
Print ISSN 0367-8245
Online ISSN 0976-058X
NAAS Rating 5.60
SJR 0.293

Frequency :

Bi-monthly (February, April, June, August, October and December)

Indexing Services :

BIOSIS Preview, ISI Citation Index, Biological Abstracts, Elsevier (Scopus and Embase), AGRICOLA, Google Scholar, CrossRef, CAB Abstracting Journals, Chemical Abstracts, Indian Science Abstracts, EBSCO Indexing Services, Index Copernicus

Submit

Indian Journal of Agricultural Research, volume 38 issue 1 (march 2004) : 69 - 72

HETEROSIS AND INBREEDING DEPRESSION IN LOWLAND RICE CROSSES

J.N. Reddy

Affiliations

¹Division of Crop Improvement, Central Rice Research Institute, Cuttack - 753 006, India

Submitted|
First Online |
doi

Cite article:- Reddy J.N. (2024). HETEROSIS AND INBREEDING DEPRESSION IN LOWLAND RICE CROSSES. Indian Journal of Agricultural Research. 38(1): 69 - 72. doi: .

ABSTRACT

Heterosis and inbreeding depression (10) were studied in 28 crosses involving eight dillerse parents of lowland rice for grain yield and its component traits under normal (E1) and late (E2) planting situations. Highly significant and positive heterosis for grain yield was observed in 15 and 9 crosses under E1 and E2, respectively. Among the different characters grain yield/plant recorded highest heterosis (97.0%) folloWed by biolcigical yield/plant (84.4%), no. of panicles/plant (84.0%) and no. of filled grains/panicle (81.0%) under normal planting. Similar magnitude of heterosis was observed for grain yield/plant under late planting also. In most of the crosses high heterosis for grain yield and its components was invariably accompanied by high inbreeding depression in F 2 generation. Under normal planting no, of panicles/plant exhibited highest 10 (56.8%) followed by grain yield/plant (54.5%) and biological yield/plant (52.3%). Among the different crosses four combinations viz., CN 1035–59/CN 718-8-21-10, Gayatri/Lunisree, Gayatri/Manoharsali and Lunisree/OR 1334-8 which shoWed significant positive heterosis for grain yield and some of its components under normal and late planting situations are suggested for commercial exploitation to improve grain yield in lowland rice

KEYWORDS

REFERENCES

Anandakumar, c':n.and Sreerangasamy, S.R. (1986). Oryza., 23: 96-101.
Grafius, J. (1959). Agron. J., 51: 551-554.
Kempthorne, D. (i957). An Introouction to Genetic Statistics. John Wiley and Sons Inc., New York.
Pandey, M.P. et. al (1995). fndianJ. Genet., 55: 438-445.
Paramasivan, K.S. and Sreetangasamy, SR (1987). O!Ja'a., 24: 206-214.
Singh, Mamta and Maurya, D.M. (1999). O!Ja'a., 36: 24-27.
Si~gh, S.K. and Haque, M.F. (1999). fndianJ. Genet., 59: 237-238.

Disclaimer :

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.

Copyright :

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reviewed By

Share options

Editorial Board

View all (0)

HETEROSIS AND INBREEDING DEPRESSION IN LOWLAND RICE CROSSES

ABSTRACT

KEYWORDS

REFERENCES

Reviewed By

In this Article

APC

Publish With US

Become a Reviewer/Member

Open Access

Products and Services

Support and Policies

Editorial Board