HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (18) Citing Articles via Google Scholar Google Scholar Articles by Uribelarrea, M. Articles by Westgate, M. E. Search for Related Content PubMed Articles by Uribelarrea, M. Articles by Westgate, M. E. Agricola Articles by Uribelarrea, M. Articles by Westgate, M. E. Related Collections Crop Growth and Development Crop Physiology & Metabolism Maize Management

Pollen Production, Pollination Dynamics, and Kernel Set in Maize

^a Dep. de Producción Vegetal, Fac. de Agronoma, Univ. de Buenos Aires, Av. San Martín 4453, Buenos Aires (C1417DSE), Argentina
^b Dep. of Agronomy, Iowa State Univ., 1563 Agronomy Hall, Ames, IA 50011-1010

View larger version (29K): [in a new window]   Fig. 1. Daily pollen production at two sites (Morris and Salto). At Morris, maize hybrids AP162 (a) and AP9191 (b) were tested at three plant densities. At Salto, hybrids DK664 (c and d) and DK752 (e and f) were tested at two plant densities and three detasseling levels. At Morris, the arrows represent the date of a heavy rain and wind storm. Vertical bars represent SEM x 3.

View larger version (35K): [in a new window]   Fig. 2. Estimated daily pollen production of an individual tassel and accumulated number of exposed silks from the apical ear (E1) of hybrids DK664 (top panels) and DK752 (bottom panels) cropped at two plant densities (3 and 9 plants m-2) at Salto. The parameters correspond to the Gaussian equation (Pollen grains tassel-1 = x e[-2(DAA-c)2/b2] fitted to pollen data, where a is the area under the curve; b is the number of days between those two points of the curve for which pollen production is half of maximum daily pollen production; DAA is days after start of anthesis; and c is the DAA when maximum daily pollen production is reached.

View larger version (22K): [in a new window]   Fig. 3. Response of kernel set in the apical ear (E1) of four hybrids (AP162, AP9191, DK664, and DK752) to (a) the number of pollen grains per square centimeter registered on the date of silking of individual plants (plants were grouped by silking date), and (b) the cumulative number of pollen grains received per silk exposed from the apical ear. For each hybrid, kernel number of plants with the same silking date was averaged and values referred to the maximum average for computing kernel set. The equations correspond to the model fitted in each figure. In panel (a), the model was fitted exclusively to late-silking plants of the American hybrids (AP162 and AP9191) and do not include symbols in brackets from the Argentine hybrids (DK664 and DK752).