Effect of ploidy on yield and quality of pearl millet x napiergrass hybrids

Journal Article · · Agron. J.; (United States)

OSTI ID:5941828

Hanna, W W; Gaines, T P; Gonzalez, B; Monson, W G

The highly male and female sterile triploid pearl millet (Pennisetum americanum (L.) Leeke) x napiergrass (P. purpureum Schum.) interspecific hybrids produce high quality forage. Colchicine induced hexaploids are male and female fertile and morphologically resemble the triploids. However, information concerning the effects of increased ploidy on agronomic, quality, and elemental factors of the forage is limited. In 1979 and 1980, triploid and hexaploid clones of several interspecific hybrids were established in the field on a Fuquay soil (loamy, siliceous, thermic Arenic Plinthic Paleudults) and evaluated for dry matter yield, concentrations of dry matter, in vitro dry matter disappearance (IVDMD), crude protein, total sugars, cell wall, and the elements P, K, Mg, Ca, Mn, Zn, Fe, and Cu. Triploids on the average had higher dry matter yields, and dry matter and protein concentrations than hexaploids. At anthesis, 3x plants were equal to or higher than 6x plants while at the vegetative stage 6x plants were generally higher than or equal to 3x plants in IVDMD. No differences were observed between 3x and 6x plants for total sugars and cell wall. Significant differences for elemental concentrations between ploidy levels were observed in 1980 for P (6x>3x), K (6x>3x), and Fe (3x>6x). These differences were not consistent for all clones. Increased ploidy from 3x to 6x in this study generally had a neutral or negative effect on the characters studied. Triploids have the potential to produce higher yields of higher quality forage than hexaploids.

• DOE Contract Number: AS09-76EV00637
• OSTI ID: 5941828
• Journal Information: Agron. J.; (United States), Journal Name: Agron. J.; (United States) Vol. 76; ISSN AGJOA
• Country of Publication: United States
• Language: English

Related Subjects

550400* -- Genetics
59 BASIC BIOLOGICAL SCIENCES
ALKALI METALS
ALKALINE EARTH METALS
BIOLOGICAL EFFECTS
CALCIUM
CARBOHYDRATES
CELL CONSTITUENTS
CELL WALL
CEREALS
COPPER
DISACCHARIDES
ECOLOGICAL CONCENTRATION
ELEMENTS
GRASS
HYBRIDIZATION
IRON
MAGNESIUM
MANGANESE
METALS
MILLET
NONMETALS
OLIGOSACCHARIDES
ORGANIC COMPOUNDS
PHOSPHORUS
PLANTS
PLOIDY
POTASSIUM
PRODUCTIVITY
PROTEINS
SACCHARIDES
SACCHAROSE
TRANSITION ELEMENTS
ZINC