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(Mexican Super Dwarf x Chinese) x El...

Pixley-Sinclair, Alfredo Leopoldo.

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(Mexican Super Dwarf x Chinese) x Elite Composite: I. Allozyme assays of germplasms and derived populations. II. Recurrent selection for yield-index in normal and dwarf subpopulations.

Record Type:	Electronic resources : Monograph/item
Title/Author:	(Mexican Super Dwarf x Chinese) x Elite Composite: I. Allozyme assays of germplasms and derived populations. II. Recurrent selection for yield-index in normal and dwarf subpopulations./
Author:	Pixley-Sinclair, Alfredo Leopoldo.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 1989,
Description:	200 p.
Notes:	Source: Dissertation Abstracts International, Volume: 50-12, Section: B, page: 5389.
Contained By:	Dissertation Abstracts International50-12B.
Subject:	Agronomy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9013623

(Mexican Super Dwarf x Chinese) x Elite Composite: I. Allozyme assays of germplasms and derived populations. II. Recurrent selection for yield-index in normal and dwarf subpopulations.
Pixley-Sinclair, Alfredo Leopoldo.

(Mexican Super Dwarf x Chinese) x Elite Composite: I. Allozyme assays of germplasms and derived populations. II. Recurrent selection for yield-index in normal and dwarf subpopulations. - Ann Arbor : ProQuest Dissertations & Theses, 1989 - 200 p.

Source: Dissertation Abstracts International, Volume: 50-12, Section: B, page: 5389.

Thesis (Ph.D.)--The University of Nebraska - Lincoln, 1989.

Enzyme loci Pgm1, Adh1, Phi1, Acp4, Est4, Pgd1, Pgd2, Got1, Mdh2, Est1, Acp1, Glu1 and Prx1 were assayed electrophoretically by using 100 seedlings each of eight populations: Mexican Super Dwarf, Chinese, Elite Composite, Composite population (Mexican Super Dwarf x Chinese) x Elite composite and two cycles of recurrent selection for yield-index in normal and dwarf sub-populations derived from the composite population.Subjects--Topical Terms:

2122783
Agronomy.

(Mexican Super Dwarf x Chinese) x Elite Composite: I. Allozyme assays of germplasms and derived populations. II. Recurrent selection for yield-index in normal and dwarf subpopulations.
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035 $a (MiAaPQ)AAI9013623
035 $a AAI9013623
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100 1 $a Pixley-Sinclair, Alfredo Leopoldo. $3 3341764
245 1 0 $a (Mexican Super Dwarf x Chinese) x Elite Composite: I. Allozyme assays of germplasms and derived populations. II. Recurrent selection for yield-index in normal and dwarf subpopulations.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1989
300 $a 200 p.
500 $a Source: Dissertation Abstracts International, Volume: 50-12, Section: B, page: 5389.
500 $a Adviser: C. O. Gardner.
502 $a Thesis (Ph.D.)--The University of Nebraska - Lincoln, 1989.
520 $a Enzyme loci Pgm1, Adh1, Phi1, Acp4, Est4, Pgd1, Pgd2, Got1, Mdh2, Est1, Acp1, Glu1 and Prx1 were assayed electrophoretically by using 100 seedlings each of eight populations: Mexican Super Dwarf, Chinese, Elite Composite, Composite population (Mexican Super Dwarf x Chinese) x Elite composite and two cycles of recurrent selection for yield-index in normal and dwarf sub-populations derived from the composite population.
520 $a Departure from expectation of genotype frequencies in the composite population relative to the component populations suggested the effect of natural selection.
520 $a Differences among populations in their allele frequencies were detected for the 13 enzyme loci assayed. Changes in allele frequencies in cycle-1 and cycle-2 for both sub-populations relative to the allele frequencies in the composite population suggested an effect of artificial selection on allozyme frequencies. The br$\sb2$ gene did not seem to influence this effect through linkage with allozyme alleles of loci Pgm1 and Adh1.
520 $a Also a trial was conducted involving 200 S$\sb1$ families each of the normal and dwarf sub-populations of cycle-2, plus 10 checks of cycle-1, all grown at two plant population densities. A 14 x 15 rectangular lattice design was used. For both types of plants, family means for days to anthesis, plant and ear height, grain moisture, ears per plant, adjusted grain yield and yield-index differed significantly (P $<$ 0.01), indicating variability among families. High heritabilities suggest that further improvement can be made in both sub-populations. Means of cycle-1 and cycle-2 have been improved in the direction intended for adjusted grain yield and yield-index in both sub-populations and for days to anthesis in the normal sub-population. Families x density interactions were non-significant, indicating no differential effect of density on families. Density x stature interactions were also non-significant.
520 $a Possibly these results are related through the association of selection for yield-index with changes in allozyme frequencies, suggesting linkage of allozymes with quantitative genes that affect the components of yield-index.
590 $a School code: 0138.
650 4 $a Agronomy. $3 2122783
650 4 $a Genetics. $3 530508
690 $a 0285
690 $a 0369
710 2 $a The University of Nebraska - Lincoln. $3 1024939
773 0 $t Dissertation Abstracts International $g 50-12B.
790 $a 0138
791 $a Ph.D.
792 $a 1989
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9013623