Incorporation of blast resistance into 鈥淧RR78鈥? an elite Basmati rice restorer line, through marker assisted backcross breeding

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• 作者：Vikas K. Singh^a ; ^b ; Atul Singh^a ; ^b ; S.P. Singh^b ; Ranjith K. Ellur^a ; Vikas Choudhary^c ; S. Sarkel^c ; Devinder Singh^a ; S. Gopala Krishnan^a ; M. Nagarajan^d ; K.K. Vinod^d ; U.D. Singh^c ; R. Rathore^e ; S.K. Prashanthi^f ; P.K. Agrawal^g ; J.C. Bhatt^g ; T. Mohapatra^h ; K.V. Prabhu^a ; A.K. Singh^a ; ^{aks_gene@yahoo.com}
• 关键词：Basmati restorer line ; Blast resistance ; Foreground selection ; Grain and cooking quality ; Hybrid rice ; Marker assisted backcross breeding
• 刊名：Field Crops Research
• 出版年：2012
• 期刊代码：44_03784290
• 类别：abs
• 出版时间：14 March, 2012
• 卷：128
• 期：Complete
• 页码：8-16
• 文件大小：543 K

摘要

Pusa RH10, a popular high yielding superfine grain aromatic rice hybrid and its parents Pusa6A and PRR78 are highly susceptibility to blast disease. Marker assisted backcross breeding (MABB) approach was employed to incorporate blast resistance genes viz., Piz-5 and Pi54, from the donor lines C101A51 and Tetep into the genetic background of PRR78 to develop Pusa1602 (PRR78 + Piz5) and Pusa1603 (PRR78 + Pi54), respectively. Foreground selection for the genes Piz-5 and Pi54 was effected using tightly linked molecular markers, AP5930 and RM206, respectively in two independent backcross series. Further, foreground selection was coupled with stringent phenotypic selection for agronomic, grain and cooking quality traits, to accelerate recurrent parent phenome recovery. Five superior BC₂F₂ plants homozygous from each of the backcross series were selected and advanced to BC₂F₅ generation through pedigree selection to develop improved versions of PRR78 with blast resistance. Background analysis revealed the recurrent parent genome recovery up to 89.01%and 87.88%in Pusa1602 and Pusa1603 lines, respectively. The hybrids produced by crossing Pusa6A with improved lines of PRR78, were on par with original Pusa RH10 in terms of yield, grain and cooking quality traits with an added advantage of blast resistance.