Male parent effects on stigma receptivity and seed set of sorghum A-lines under chilling field temperatures

Cisneros-López, M.E. and Mendoza-Onofre , L.E. and González-Hernández, V.A. (2012) Male parent effects on stigma receptivity and seed set of sorghum A-lines under chilling field temperatures. Plant Breeding, 131 (1). pp. 88-93.

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Abstract

Sorghum hybrid seed production involves restorer (R) and maintainer (B) lines as pollen donors. In the Mexican Highlands, R-lines produce more viable pollen than B-lines. The influence of this characteristic on stigma receptivity and seed set (seeds/flowers) of A-lines is unknown. Six pairs of A/B lines and four R-lines were sown. In the A-lines, length of stigma, style and ovary, stigma receptivity and seed set were registered. In the B- and R-lines, pollen traits (production, diameter and viability) were measured. Crosses A × R were made, and the A × B isogenic crosses served as controls. There were differences (P ≤ 0.05) among genotypes for all variables. Stigma receptivity traits averaged over the A × R crosses were lower than those of the A × B crosses. Seed production traits of the A-lines varied depending upon the R-line crossed to, but the highest seed set was 0.37. Pollen characteristics of the B- or R-lines did not correlate with stigma receptivity and neither with seed production nor with seed set of the A-lines

Item Type:	Article
Uncontrolled Keywords:	cold tolerance;hybrid parental lines;seed set;stigma receptivity;Sorghum bicolor
Author Affiliation:	Department of Seed Production, Colegio de Postgraduados, Campus Montecillo, 56230, Montecillo, Edo. de México, México
Subjects:	Crop Improvement
Divisions:	Sorghum
Depositing User:	Ms K Syamalamba
Date Deposited:	06 Jan 2012 03:13
Last Modified:	08 Aug 2012 04:04
Official URL:	http://dx.doi.org/10.1111/j.1439-0523.2011.01922.x
URI:	http://eprints.icrisat.ac.in/id/eprint/2920

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