Mapping QTLs for popping ability in a popcorn x flint corn cross.

Mapping QTLs for popping ability in a popcorn x flint corn cross. Research Abstract Details 

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Mapping QTLs for popping ability in a popcorn x flint corn cross. Abstract Text:

R Babu,S K Nair,A Kumar,H S Rao,P Verma,A Gahalain,I S Singh,H S Gupta,

Popping expansion volume (PEV) in popcorn (Zea mays L.) is a distinct heritable character and defined as the ratio of the volume after popping to the volume before popping. PEV is quantitatively inherited and 3-4 genes/quantitative trait loci (QTLs) have been implicated. In the present study, we have dissected the quantitative PEV into two component traits, viz., flake volume (FV) and percent unpopped kernels (UPK), and mapped QTLs using SSR markers for all three traits with 194 F3 families derived from a popcorn (A-1-6) x flint corn (V273) cross. Heritability (broad sense) estimates for PEV, FV and UPK based on F3 mean bases were 0.72, 0.54 and 0.68, respectively. The QTL analyses for the three traits based on combined environment data were performed by composite interval mapping using QTL cartographer. Four QTLs were identified for PEV on chromosomes 1, 3, 8 and 10, which together explained 62% of the phenotypic variance (sigma2p). Four QTLs were found on chromosomes 1, 5, 9 and 10 for FV (explaining 44% of sigma2p) and five QTLs for UPK on chromosomes 1, 3, 4, 5 and 9 (explaining 57% of sigma2p). The relative efficiency estimates of marker-based selection in comparison to phenotypic selection for PEV (1.10), FV (1.22) and UPK (1.11) indicated that marker-based selection could be relatively more efficient. The QTL on chromosome 1S for PEV was found to be most significant, where QTLs for hard endosperm starch concentration had been detected earlier.

Mapping QTLs for popping ability in a popcorn x flint corn cross. Publishing Authors By Initials

R Babu,SK Nair,A Kumar,HS Rao,P Verma,A Gahalain,IS Singh,HS Gupta,

For similar plants: plant families and groups: angiosperms: poaceae: zea mays research abstracts see: plants: plant families and groups: angiosperms: poaceae: zea mays research

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Mapping QTLs for popping ability in a popcorn x flint corn cross. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: TAG. Theoretical and applied genetics. Theoretisch

VOLUME: 112

Page Numbers: 1392-9

Journal Abbreviation: Theor. Appl. Genet.

ISSN: 0040-5752

DAY: 9

MONTH: 03

YEAR: 2006

Mapping QTLs for popping ability in a popcorn x flint corn cross. Information

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LANGUAGE: eng

NlmUniqueID: 145600

Mapping QTLs for popping ability in a popcorn x flint corn cross. Keywords Mesh Terms:

KEYWORDS: Zea mays

MESH TERMS: genetics

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Substance Name: Genetic Markers

Registry Number: 0

Grant and Affiliation Information for Mapping QTLs for popping ability in a popcorn x flint corn cross.

AFFILIATION: Vivekananda Institute of Hill Agriculture (ICAR), 263601, Almora, Uttaranchal, India. rbabu_icar@rediffmail.com

Country: Germany

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MEDLINETA: Theor Appl Genet

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