Genetic Divergence in Grass pea [Lathyrus sativus (L.)]
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Date
2008
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Publisher
MPUAT, Udaipur
Abstract
The present study entitled as “Genetic Divergence in Grass pea
[Lathyrus sativus (L.)] was carried-out using 16 diverse varieties/strains derived as
somaclonal variants of variety Ratan of Lathyrus sativus (L.) for seed yield and its
components. The material was planted during three crop seasons: rabi, 2005-06,
2006-07 and 2007-08 at instructional farm Rajasthan College of Agriculture, Udaipur
under conserved moisture in three replications following uniform and recommended
agronomical practices. Observations were recorded for 8 yield contributing characters
and seed protein content.
Variability parameters and correlations were computed for each year
while path analysis were estimated for seed yield per plant as well as seed protein
content for each year. Genetic divergence was computed for seed yield per plant over
pooled basis using Mahalanobis (1936) D2 statistics.
Grass pea entries R-15, I-30 and R-33 displayed superiority for seed
yield as well as seed protein content. Pods per plant, plant height, seeds per pod,
branches per plant and 100-seed weight turned out to be the most contributing traits
for enhancing seed yield and seed protein content in grass pea On the basis of
divergence studies, it was concluded that there was no relationship between genetic
and geographic diversity. These 16 varieties/strains were grouped into 5 clusters.
Maximum inter-cluster distance was between cluster IV and V and genotypes of these
clusters with high per se performance could be utilized in breeding programmes.
Characters contributing maximum to seed yield were branches per plant, pods per
plant, plant height and 100-seed weight. Genetically diverse and high yielding
varieties/strains of grass pea like L-08, R-09, I-18, I-30, R-15 and R-33 could be used
for breeding programme so as to ameliorate the productivity and quality of grass pea.
Description
Genetic Divergence in Grass pea [Lathyrus sativus (L.)]
Keywords
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Citation
Gaur and Maloo, 2008