EARLY GENERATION SELECTION FOR YIELD AND ITS COMPONENTS IN CHICKPEA (Cicer arietinum L.)
KrishiKosh
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Title |
EARLY GENERATION SELECTION FOR YIELD AND ITS COMPONENTS IN CHICKPEA (Cicer arietinum L.)
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Creator |
TA LAPADA MANSUKHLA L MOHANBHAI
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Contributor |
Monpara . B. A.
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Subject |
CHICKPEA
GENETICS & PLANT BREEDING |
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Description |
For maximum efficiency and progress in breeding for chickpea, it would be advantageous if effective selection could be carried out in as early a generation as possible so that only best lines would be retained for further testing. Five populations of chickpea were formed by involving seven parents. Ten F2 plants from each of these crosses were selected for high as well as for low expression of pods per plant, seeds per plant, harvest index and seed yield per plant. The F3 lines from 226 selected F2 plants were grown in randomized block design with three replications. Results revealed that selection for high level had maintained their higher expression for pods per plant, seeds per plant and seed yield. Increasing of CV values in F3 as compared to F2 generation usually not expected, may be due to the predominant repulsion phase linkage. Correlations among pods per plant, seeds per plant and seed yield from F2 generation to derived F3 lines of them were increased as the generation was advanced. Realized heritability estimates were inconsistent and cross dependent. Low heritability coupled with low genetic advance and inconsistent correlations of F2/F3 generations for the selection criterion indicated the influence of environment on the effectiveness of selection. Selection for improvement of seed yield using pods per plant was found effective as significant yield difference between high and low level of this trait was observed in all the crosses. However, its effectiveness may be considered as moderately successful because of 40% of high yielding F3 progenies were derived from F2 plants with high pod number. In contrast, selection for other components and seed yield itself showed significant yield advantage in certain situations, however, it could not be recommended as routine procedure. There was no definite pattern for identification of superior yielding lines through selection of yield and its components. Some superior yielding lines were identified by selection for all the traits, whereas, some superior progenies were obtained even in the absence of high expression of all the traits. It is concluded that while gain in yield can be achieved by selecting for high pod number in early generation, a foremost consideration needs to be the influence of environment on the effectiveness of selection. |
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Date |
2016-09-22T09:03:14Z
2016-09-22T09:03:14Z 2012-06 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/78253
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Language |
en
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Format |
application/pdf
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