TY  - BOOK
AU  - Sindhu V K 
AU  - Nandini K (Guide)
TI  - Physiological Genetics of Character Associations in Hybrid Rice
U1  - 630.28 
PY  - 2001///
CY  -  Vellanikkara
PB  - Department of Plant Breeding and Genetics, College of Horticulture
N2  - The studies were conducted at the College of Horticulture, Vellanikara, to 
analyse the "Physiological Genetics of character associations in Hybrid rice 
(Oryza Sativa L.) ". The study mainly aims to characterize the morpho- 
metabolic associations in plant attributes that contribute to higher productivity 
in hybrid rice. Three hybrids and their parental genotypes were evaluated to. 
understand how different genotypes may compliment one another 
physiologically and also to identify the stages at which the better physiological 
efficiency contribute heterosis. 
From this study, it was revealed that the heterotic advantages result in 
two ways VlZ., generalized morphologic improvement in growth and yield 
attributes and efficiency enhancement. The results also envisages the 
importance of heterotic functional efficiency over morphological efficiency. 
The stability of chlorophyll aJb ratio and the differential changes of Nrase 
enzyme activity, both at different phenophases shall serve as a better index for 
selection of genotypes in rice breeding programme. 
The pattern of biochemical character like soluble protein, enzymes like 
Peroxidase, catalase revealed that the magnitude of physiological expression is 
independent of genetic 'capabilities or genetic expressivity is conditioned by 
physiology of the plant. 
The soluble protein and enzyme activity at tillering phase appears to be 
the most critical in deciding the yield of the rice, in order to achieve a 
complete heterotic effect' in rice breeding. The biochemical as well as 
physiological aspects at different growing stages should be given due 
importance. 


UR  - https://krishikosh.egranth.ac.in/handle/1/5810106201
ER  -