SODIUM AZIDE INDUCED GENETIC VARIABILITY IN M4 GENERATION OF INDIAN MUSTARD (Brassica juncea) coss.
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Date
2019-06-26
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Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The present study was carried out with the objectives to estimate variances between family and within family in M4 generation, to estimate genetic parameters in M4 generation and to identify superior mutants in M4 generation for further utilization, at experimental farm of AICRP Linseed and Mustard, College of Agriculture Nagpur during rabi 2019 in M4 generation. In rabi 2019, 161 mutants along with three checks (PM 21, Kranti and Shatabdi) were evaluated in M4 generation in two replication. Data were recorded on days to 50% flowering, days to maturity, plant height, number of primary branches plant-1, number of siliqua plant-1, number of seed siliqua-1, length of siliqua, seed yield plant-1 and 1000 seed weight were recorded.
Analysis of variance indicated that the mean squares due to between family were highly significant for all traits, revealing the presence of significant genetic variability between the families.
Intra class correlation (t) lead the conclusion that differences between individuals within family is large and each family differentiated distinctly from the other one at lower level in M4 generation hence, equal weightage to σ2f and σ2w were suggested to be considered for selection in M4¬ generation.
The genetic parameter analysis revealed the importance of number of siliqua plant-1 and seed yield plant-1 for selection of better individual mutant from the progenies, based on genotypic coefficient of variation, phenotypic coefficient of variation, heritability and genetic advance. In M5 generation 93 individual plants from progeny were selected from 161 mutants of M4 generation. These mutants will be further evaluated in M5 generation and those found superior will be forwarded to yield trials.
Description
Field experiment was undertaken at experimental farm of AICRP Linseed and Mustard, College of Agriculture Nagpur during rabi 2019 in M4 generation. 161 mutants along with three checks (PM 21, Kranti and Shatabdi) were evaluated in M4 generation in two replication. Data were recorded on days to 50% flowering, days to maturity, plant height, number of primary branches plant-1, number of siliqua plant-1, number of seed siliqua-1, length of siliqua, seed yield plant-1 and 1000 seed weight were recorded.
Keywords
Mustard mutants, heritability, genetic advance
Citation
PRAJAPATI, SHAILENDRA SAGAR. (2019). Sodium azide induced genetic variability in m4 generation of indian mustard (brassica juncea) coss. Department of botany,Nagpur. Dr.Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. 2019. Print. xi, 81p. (unpublished).