A selection strategy-securing yield gains in groundnut

Arunachalam, V. ; Koteswara Rao, M. V. ; Bandyopadhyay, A. (1992) A selection strategy-securing yield gains in groundnut SABRAO journal, 24 (2). pp. 123-131. ISSN 1010-3902

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The F2 generation of six crosses with divergent parents were studied for a number of physiological and yield components in ground (Arachis hypogaea L.). A stepwise multiple regression analysis indicated the importance of photosynthetic area and leaf dry matter in explaining the variation in kernel yield. 428 F2 plants studied for those characters in addition to pod yield and its components formed Experiment I and 1259 F2 plants studied only for yield and its components Experiment II. The number of selection as well as pod yield gains were larger in F3 derived from Experiment I than from Experiment II. This trend was consistent in F4 too. The F2 plants were also ranked on the regression index values and the F2 ranked distribution was partitioned into 5 strata, L1 to L5, each containing equal number of F2 plants. Lines derived from L1 to L2 accounted for large proportion of realized gains from F3 to F5. The results taken across experiments suggested that an efficient cost-, time-and resource-efficient strategy would be to select F2 plants on a regression index based on yield and key physiological components like photosynthetic area and harvest index and to forward the progeny of F2 plants from the top 25% ranked distribution.

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Source:Copyright of this article belongs to Society for the Advancement of Breeding Researches in Asia and Oceania.
ID Code:89395
Deposited On:27 Apr 2012 10:32
Last Modified:27 Apr 2012 10:32

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