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Development of Statistical Model For Comparision of Wheat Genotypes

KrishiKosh

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Title Development of Statistical Model For Comparision of Wheat Genotypes
 
Creator N.O.Pradeepkumar
 
Contributor Y.N.Havaldar
 
Subject Agricultural Statistics
 
Description In order to asses the best general and specific combiners among 12 dicoccum wheat
genotypes and to find out the relationship between genetic divergence among the parents and
heterosis for grain yield, an investigation was undertaken. The data were collected from Dr.
Sanjaya Rajaram Wheat Laboratory, MARS, UAS, Dharwad.
The data subjected to Griffing’s method 2, model I for half diallel analysis. ANOVA
was carried out to find out the variance associated among the genotypes for 17 characters
under both timely and late sown conditions.
Estimation of general combining ability effects was undertaken. The genotypes DDK-
1001, DDK-1013, DDK-1017, and MACS-2925 identified as the best general combiners in
timely sown condition as well as in late sown condition. In specific combining ability effects
estimation, the crosses DDK-1001 x MACS-2928, DDK-1009 x DDK-1013, DDK-1001 x
MACS-2912, DDK-1013 x MACS-2931, DDK-1001 x MACS-2931 and DDK-1017 x
MACS-2928 were the best specific combiners in timely sown condition.
In late sown condition the crosses DDK-1001 x DDK-1009, MACS-2928 x LKDK-
247, DDK-1013 x DDK-1017, DDK-1001 x LKDK-247, NP-200 x DDK-2931, DDK-1009 x
DDK-1017 and DDK-1001 x MACS-2928 were identified as the best specific combiners.
The crosses DDK-1001 x MACS-2928, DDK-1009 x DDK-1013, NP-200 x LKDK-247,
DDK-1013 x MACS-2920, HW-2000 x LKDK-247, MACS-2912 x MACS-2928, DDK-1017
x MACS-2912, DDK-1001 x MACS-2912, NP-200 x MACS-2925 were recognized as the
best specific combiners under both the conditions.
To find the divergence among the genotypes Mahalanobis D2 analysis and Tocher’s
method was carried out for clustering the genotypes. Two clusters were formed under both
the conditions. Heterosis for grain yield over better parent carried out in both conditions to
relate the parental divergence with heterosis. It was found that most of heterotic crosses for
grain yield over better parent could be obtained from the optimum divergent group of parents.
 
Date 2016-10-17T11:45:55Z
2016-10-17T11:45:55Z
2005
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/80692
 
Format application/pdf
 
Publisher UAS, Dharwad