Indian Society of Genetics & Plant Breeding

Exploring indicator scoring as a selection tool in plant breeding: A study under conservation vs conventional tillage systems

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Indian agriculture is on an edge of transition from
conventional to conservation agriculture, the only limiting
constrant is avaliblity of cultivars adapted to conservation
agriculture. This study explores possibility of indicator
scoring system for identification of genotypes suitable for
different tillage management system namely, conventional
tillage flat bed (CTFB) and conservation agriculture (CA).
Minimum data set (MDS) was constructed by selecting the
traits from each of five principal components (PC)
accounting for 71.26% of total variation. Multiple linear
regression between MDS as independent variable and yield
and biomass as dependent variable showed R2 value of
0.661 and 0.605. Indicator score identified through nonlinear
scoring of the MDS found out CA as a superior environemt
to conventional agriculture in both years. Indicator score
identified HD3117 and HDCSW 18 for CA which support the
use of indicator scoring as a selection tool in plant breeding
as both of these lines are the product of systematic breeding
under CA condition and have revealed significant
superiority over other in multilocational yield trials for CA.

Keywords: Wheat, principal component, minimum data set, indicator scoring, selection

Info

Year: 2016
Volume: 76
Issue: 3
Article DOI: 10.5958/0975-6906.2016.00041.9
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

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Rajbir Yadav info_circle
Kiran B. Gaikwad info_circle
Soma Gupta info_circle

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