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20002
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Subject: Horticulture × Author: Bulgundi, Sanjay Kumar ×
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    ThesisItemOpen Access
    HETEROSIS AND COMBINING ABILITY STUDIES IN BRINJAL (Solanum melongena L.)
    (University of Agricultural Science, Dharwad, 2000) Bulgundi, Sanjay Kumar; Patil, Ramangouda V
    "The study was under taken to assess the per se performance, magnitude of heterosis and combining ability in respect of yield and its components in brinjal. A line X tester set was obtained by crossing six lines with five testers. Thirty F 's along with their parents and a commercial check (Sanju) were planted in randomised block design during the year 1999 at the College of Agriculture, Dharwad. Hybrids showed significant differences for all the 23 traits. Significant perse performance and economic heterosis in desirable direction was recorded in several crosses. The crosses RL x TL, RL x W-8 and RL x R expressed heterosis to the extent of 59.96, 11.90 and 11.90 per cent, respectively over commercial check for yield per plant. Considering the consumer preference, these hybrids were also found suited to some parts of northern Karnataka namely parts of Belgaum, Bijapur and Bellary. Hence, these hybrids can be emphasized for commercial exploitation. The heterosis for high yield was found to be much regulated by the hybrid vigour, expressed by its component character - number of fruits per plant. The estimated components of general and specific combining ability variances revealed that differences among lines, testers and line x tester was significant for all characters except days to first picking in lines and fruit density in line x tester. The dominance variance was higher than additive variance in all traits indicating predominance of non-additive gene effects, except for days to 50 per cent flowering, number of flowers per inflorescence, days to first picking, fruit length and fruit density. Hence, in such cases heterosis breeding or any other breeding programmes which utilizes combining ability information could be used. Further, for the expression of traits, contribution of the line was higher in five traits, testers in three and line x tester in fifteen traits. From, per cent gca score, it was observed that parent RL had highest positive pooled value among lines, while TL among testers indicating as best parents."
  • Thumbnail Image
    ThesisItemOpen Access
    HETEROSIS AND COMBINING ABILITY STUDIES IN BRINJAL (Solanum melongena L.)
    (University of Agricultural Science, Dharwad, 2000) Bulgundi, Sanjay Kumar; Patil, Ramangouda V
    "The study was under taken to assess the per se performance, magnitude of heterosis and combining ability in respect of yield and its components in brinjal. A line X tester set was obtained by crossing six lines with five testers. Thirty F 's along with their parents and a commercial check (Sanju) were planted in randomised block design during the year 1999 at the College of Agriculture, Dharwad. Hybrids showed significant differences for all the 23 traits. Significant perse performance and economic heterosis in desirable direction was recorded in several crosses. The crosses RL x TL, RL x W-8 and RL x R expressed heterosis to the extent of 59.96, 11.90 and 11.90 per cent, respectively over commercial check for yield per plant. Considering the consumer preference, these hybrids were also found suited to some parts of northern Karnataka namely parts of Belgaum, Bijapur and Bellary. Hence, these hybrids can be emphasized for commercial exploitation. The heterosis for high yield was found to be much regulated by the hybrid vigour, expressed by its component character - number of fruits per plant. The estimated components of general and specific combining ability variances revealed that differences among lines, testers and line x tester was significant for all characters except days to first picking in lines and fruit density in line x tester. The dominance variance was higher than additive variance in all traits indicating predominance of non-additive gene effects, except for days to 50 per cent flowering, number of flowers per inflorescence, days to first picking, fruit length and fruit density. Hence, in such cases heterosis breeding or any other breeding programmes which utilizes combining ability information could be used. Further, for the expression of traits, contribution of the line was higher in five traits, testers in three and line x tester in fifteen traits. From, per cent gca score, it was observed that parent RL had highest positive pooled value among lines, while TL among testers indicating as best parents."