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Characterization of backcross introgression lines derived from Oryza nivara accessions for photosynthesis and yield

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Title Characterization of backcross introgression lines derived from Oryza nivara accessions for photosynthesis and yield
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Creator Yadavalli Venkateswara Rao Sukumar Mesapogu Sarla Neelamraju, Divya Balakrishnan Thuraga Vishnu Kiran Sitapathi Rao Voleti, Krishnam Raju Addanki Desiraju Subrahmanyam
 
Subject BILs, Oryza nivara, Photosynthesis, Seasonal variation, Yield
 
Description Not Available
Improvement of photosynthetic traits is a promising strategy to break the yield potential barrier of major food crops. Leaf photosynthetic traits were evaluated in a set of high yielding Oryza sativa, cv. Swarna 9 Oryza nivara backcross introgression lines (BILs) along with recurrent parent Swarna, both in wet (Kharif) and dry(Rabi) seasons in normal irrigated field conditions. Net photosynthesis (PN) ranged from 15.37 to 23.25 µmol(CO2) m-2 s-1 in the BILs. Significant difference in PN was observed across the seasons and genotypes. Six BILs showed high photosynthesis compared with recurrent parent in both seasons. Chlorophyll content showed minimum variation across the seasons for any specific BIL but significant variation was observed among BILs. Significant positive association between photosynthetic traits and yieldtraits was observed, but this association was not consistent across seasons mainly due to contrasting weather parameters in both seasons. BILs 166s and 248s with high and consistent photosynthetic rate exhibited stable high yield levels in both the seasons compared to the recurrent parent Swarna. There is scope to exploit photosynthetic efficiency of wild and weedy rice to identify genes for improvement of photosynthetic rate in cultivars.
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Date 2018-12-13T06:25:58Z
2018-12-13T06:25:58Z
2018-07-13
 
Type Journal
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/15890
 
Language English
 
Relation Not Available;
 
Publisher Springer