correlat - GENETIC VARIABILITY DIVERSITY AND ASSOCIATION OF...

Info icon This preview shows pages 1–7. Sign up to view the full content.

Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

GENETIC VARIABILITY, DIVERSITY AND ASSOCIATION OF QUANTITATIVE TRAITS WITH GRAIN YIELD IN RICE ( ORYZA SATIVA L.) Submitted to Dr.K.B.ESWARI Assoc. Professor Dept.of GPBR Submitted by N.SURESH KUMAR JAM/13-06
Image of page 2
J. bio-sci. 17: 77-82, 2009 ISSN 1023-8654 GENETIC VARIABILITY, DIVERSITY AND ASSOCIATION OF QUANTITATIVE TRAITS WITH GRAIN YIELD IN RICE ( ORYZA SATIVA L.) Praveen Pandey*, P John Anurag, D K Tiwari, S K Yadav, Binod Kumar Department of Genetics and Plant Breeding, Allahabad Agricultural Institute- Deemed University, Allahabad-211007 (U.P.) India
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Abstract Context: Genetic diversity is pre-requisite for any crop improvement programme as it helps in the development of superior recombinants. Objectives: Recognizing the importance of genetic diversity in plant breeding experiments, the present research work was taken up to estimate genetic diversity in different accessions of rice for various agro-economically important characters. Materials and Methods: Experiments were carried out with 40 Rice ( Oryza sativa L.) genotypes which were evaluated for yield and yield contributing traits in Kharif-2007-08. The data were recorded on 10 randomly selected plants from each replication for 12 quantitative characters studied. However days to 50% flowering was recorded on per plot basis. Mean values were subjected to analysis of variance to test the significance for each character. The genetic divergence was estimated and the grouping of the genotypes into cluster was done.
Image of page 4
Results : Sufficient amount of variability was found in the entire gene pool for all traits studied. The higher magnitude of genotypic and phenotypic coefficients of variation was recorded for plant height, grain yield per hill, harvest index and biological yield per hill. High heritability along with high genetic advance as percent of mean was registered for harvest index, grain yield, plant height, biological yield, test weight, number of tillers per hill and number of spikelets per panicle suggesting preponderance of additive gene action in the expression of these characters. On the basis of Mahalanobis D2 statistics the genotypes were grouped into seven clusters. Plant height, biological yield and test weight contributed considerably, accounting for 86.16 % of total divergence. The genotypes superior in some clusters may be involve in a multiple crossing programme to recover transgressive segregants with high genetic yield potential and early maturity. Conclusion : The promising genotypes selected from diverse clusters should be involved in the hybridization programme in order to transfer some of the desirable yield contributing characters consisted by them.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Introduction Genetic improvement of crop is largely depending on the magnitude of genetic variability and the extent to which desirable traits are heritable.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.
  • Winter '17
  • xyz
  • Genetics, genotypes, grain yield

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern