Root Architecture and Genetic Variations Associated with Phosphorus Uptake in Rice
Alogaidi Faez,
Price Adam,
Johnson David
Issue:
Volume 1, Issue 1, May 2015
Pages:
1-10
Received:
13 May 2015
Accepted:
25 May 2015
Published:
26 May 2015
Abstract: Phosphorus (P) is a finite resource and is a major limiting factor for rice yield on a large area of World’s arable land. The main objective of this study was to investigate plant and soil P interaction in P limiting conditions. A P deficient 25/75% subsoil/sand mix was determined using pots in a preliminary experiment as to be used for screening 30 rice genotypes (Oryza sativa L.).The experiment was designed using a randomized complete block design to test if shallow and deep-rooted genotypes differ in extracting P present in soil by using rock phosphate in three treatments: when rock P was absent or embedded either in a shallow 10 cm layer or distributed homogenously in soil mix. All treatments were fed with Yoshida’s nutrient solution lacking of P (YNS-P). Results indicated that P treatment x genotype interaction was significant on shoot dry weight (SDW). The addition of rock phosphate especially in shallow 10 cm layer greatly stimulated plant growth where SDW of plants grown in homogenous P and shallow P significantly outgrew those in zero P treatment. Both P treatment and genotype affected root dry weight (RDW) and root/shoot ratio significantly. Rice from the aus subgroup grown in zero P treatment accumulated significantly more SDW than indica and japonica genotypes. In zero P treatment, the genotypes Black Gora, Rayada, Kasalath, Azucena, IAC25, Dom Sufid, Aux1Wild type, FR13A and especially Sadu Cho accumulated higher SDW relative to the others.
Abstract: Phosphorus (P) is a finite resource and is a major limiting factor for rice yield on a large area of World’s arable land. The main objective of this study was to investigate plant and soil P interaction in P limiting conditions. A P deficient 25/75% subsoil/sand mix was determined using pots in a preliminary experiment as to be used for screening 3...
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Genome Wide Association Mapping for Drought Recovery Trait in Rice (Oryza Sativa L.)
Zaniab Al-Shugeairy,
Adam H. Price,
David Robinson
Issue:
Volume 1, Issue 1, May 2015
Pages:
11-18
Received:
14 May 2015
Accepted:
31 May 2015
Published:
1 June 2015
Abstract: Rice is the one of the oldest crop cereals in Asia and has been grown since ancient times. In the present study, a rice diversity panel was exposed to drought and drought recovery was scored to identify QTLs and candidate genes related to drought resistance. There are no reports of QTL mapping using Genome wide association mapping for drought recovery has been published. Only one significant association on chromosome 2 for drought recovery with physical position at 24559374 bp was found. positional candidate genes underneath QTL was examined bioinformatically and through the literature revealing several interesting genes which may offer potential for developing drought resistant rice cultivars.
Abstract: Rice is the one of the oldest crop cereals in Asia and has been grown since ancient times. In the present study, a rice diversity panel was exposed to drought and drought recovery was scored to identify QTLs and candidate genes related to drought resistance. There are no reports of QTL mapping using Genome wide association mapping for drought recov...
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