Identification of Quantitative Trait Loci for Panicle Associated Traits in Recombinant Inbred Line Population Derived from Japonica X Indica sub-species in Rice (Oryza sativa L.)
2017
Chaudhari, Prabha R. | Mishra, D.K. | Xalxo, Suchita S. | Saxena, Ritu R. | Singh, Laxmi | Verulkar, S.B.
Rice recombinant inbred lines (RILs) of Japonica x Indica cross were grown in irrigated conditions for identification of quantitative trait loci (QTLs) for panicle associated traits. One hundred twenty one RIL lines were evaluated in the field environment with two replications. A total of one hundred twenty two SSR markers were used for polymorphism out of forty markers that showed parental polymorphism. Forty SSR markers were used to construct the genetic linkage map by employing single marker analysis. Maximum number of QTLs was identified for total number of spikelets per panicle and minimum for panicle weight per plant. Clustering of QTL for different traits at the same marker RM 224 and RM 312 was observed for total number of spikelets per panicle, filled spikelets per panicle and panicle weight per plant. This suggests that pleiotropism and or tight linkage of different traits could be possible for the congruence of several QTLs. Moreover, phenotypically these characters have more association with each other. Hence, these markers may be useful for marker assisted breeding programme.
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