Sugarcane family sucrose maturity trends

MILLIGAN S; BALZARINI M

Agronomy Projects

Louisiana State University

Lugar: Baton Rouge, USA ; Año: 1999 p. 72 - 74

<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @page Section1 {size:595.3pt 841.9pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:35.4pt; mso-footer-margin:35.4pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> The LAES Sugarcane Variety Development Program employs family selection among progeny produced from the hybridization program, prior to individual plant selection. The selection process relies on replicates data from the Cross Appraisal trails. These trials are independent from the regular progeny blocks in which single plant selections are made. Cross appraisal is normally collected in August prior to single selection in September. Selection is based upon family cane yield estimates which are derived from stalk number, stalk height and stalk diameter measures. Since the measures are about six weeks before the initiation of normal harvest, and since the selected single plants are typically individually screened for high Brix, family sugar content estimate are not normally recorded. If the relative normal-season sugar content of families (crosses) does not change as the season progresses, the relative sugar content and hence the relative sugar yield of families can be used to select among families and predict parental performance. This study was done to test the hypothesis that relative family sugar content rank does not change with season progression.