Effective selection criteria for evaluating seed yield and disease resistance under irrigated and rainfed environments in indian mustard (Brassica juncea l. Czern. & coss.)
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Date
2012
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Publisher
CCSHAU
Abstract
The present investigation was carried out with theobjective to find out effective selection criteria for
seed yield and to find out the relationship of effective selection parameters. Morphological characters included
days to flowering, days to maturity, plant height (cm), number of primary branches per plant, number of secondary
branches per plant, length of main shoot per plant,number of siliqua on main shoot, siliqua density, siliqua length
per plant,number of seeds per siliqua, 1000 seeds weight, oil content, seed yield per plant and seed yield (kg/ha).
Presence of substantial PCV and GCV for seed yield (kg/ha), number of secondary branches per plant, 1000-seed
weight, siliqua length under irrigated environment and under moisture stress environment, substantial PCV and
GCV present in seed yield (kg/ha), 1000 seed weight, number of primary branches per plant, number of secondary
branches per plant indicates greater variation for these traits and thus there is greater scope for further
improvement by genetic manipulation.
High heritability coupled with high genetic advance over mean for the characters like, number of
primary branches per plant, 1000 seed weight, seed yield per plant (gm) and seed yield (kg / ha ) in irrigated
environment, while for moisture stress environment high heritability and high genetic advance were estimated for
siliqua density , number of primary branches per plant, 1000 seed weight, seed yield per plant (gm), seed yield (kg
/ ha) suggesting that they can be improved through direct selection may be due to predominant additivevariation.
Moisture stress tolerance index (MSTI) was found effective selection criteria for assessing the genotypes
for their higher moisture stress tolerance and yield potential. The genotypes, PBR-375, RRN702, RH-0735, RH-0555-B, NDRS-2017-1, RGN-282, SKM-815 and DIVYA 44 performed with uniform superiority in both irrigated
and moisture stress environments. The genotypes, PR-2008-13, RGN-281, PR-2007-1, KM-9201, and DRMR-IJ-31 performed better in irrigated environment. The genotypes, HUJM-07-06, SKM B 817, RH-58, DRMR-2010-4,
DRMR-868-3, Parasmani-33, KMR-10-1, NPJ-146, RL-2010, RH-0830. RB-50 and RMM 09-3 performed better
in rainfed environment. The genotypes, RRN-722, KMR-10-2, NPJ-141, KRANTI, ACN-83, NDRS-2003-3
performed poorly in both irrigated and moisture stress environments.
The genotypes RGN-282,SKM815, NPJ-141,KMR-10-1,NDRS-2003-3KMR-10-2,NDRS-2017-1,
DRMR-868-3,PBR-375,DRMR-2010-4,PARASMANI-33,KM9201 and RH0735 were found tolerant to white rust
under irrigated environment and the genotypes SKM B 817,RGN-282, DIVYA 44, RRN-722, KMR-10-2,NDRS-2017-1,DRMRIJ-31,PBR-375,HUJM-07-06,Parasmani-33,KM-9201,RH-0735,RH-758 and RH-0555B were
found tolerant to white rust under moisture stress environment. On the basis of both the environments the
genotypes RGN-282, KMR-10-2, NDRS-2017-1, Parasmani-33, KM-9201, RH-0735 were found tolerant to white
rust. It is advocated that the genotypes identified in the present study should be tested at multilocation under
farmers field condition or be used for further improvement in breeding programmes for the development of
variety/hybrids.
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Keywords
Yields, Animal husbandry, Livestock, Breeds (Animals), Lactation, Genetics, Sire evaluation, Seasons, Biological phenomena, Economic systems