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20101
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Subject: Plant Breeding × Author: Harpreet Kaur × Start date: 2010 × Type: Thesis ×
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    GENETIC ANALYSIS OF YIELD AND QUALITY TRAITS IN FINE GRAINED AROMATIC RICE GENOTYPES (ORYZA SATIVA L.)
    (2010) Harpreet Kaur
    The study on the genetic analysis of yield and quality traits in fine grained aromatic rice genotypes (ORYZA SATIVA L.) was undertaken at Punjab Agricultural University, Ludhiana during Kharif 2008 and 2009. Gene action and combining ability for morphological, milling and cooking quality characters were studied in a set of diallel crosses involving six parents. The genetic analysis revealed that for most of the morphological traits (days to 50 percent flowering, plant height, spikelets per panicle, spikelet sterility, grain yield and harvest index), milling traits (1000 grain weight of brown rice, 1000 grain weight of milled rice, kernel length, kernel breadth, length: breadth ratio, total rice recovery and head rice recovery) and cooking quality traits (water uptake ratio) both additive and dominance gene effects were involved with the predominance of non additive gene action. Additive gene action was more pronounced for characters like plant height, spikelet sterility, kernel length, length: breadth ratio, hulling percentage and alkali spreading value. Over dominance was observed for majority of traits except plant height, spikelet sterility, kernel length, length: breadth ratio, hulling percentage and alkali spreading value. Combining ability analysis indicated the significance of both general combing ability and specific combining ability effects. Punjab Basmati 2 was good general combiner for yield and its component traits while Pusa 1121 was good general combiner for milling and cooking quality traits. Among the crosses, Basmati 386/ Punjab Basmati 2 and Basmati 386/ Pusa 1121 were desirable for yield related traits while Punjab Basmati 2/ Pusa Basmati 1, Basmati 386/ Super Basmati, Basmati 370/ Pusa 1121 and Super Basmati/ Pusa 1121 were desirable for milling and cooking quality characters. Correlation studies revealed a negative association between yield and quality traits except for alkali spreading value. Generally, milling and cooking quality traits did not show any correlation.