Evaluation of soybean [Glycine max (L.) Merr. F1 hybrids
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ArticleLanguage: En Publication details: 2009Subject(s):
In:
Journal of Crop Improvement v. 23, no. 1, p. 1-18Summary: Heterosis is an important factor in development of hybrid cultivars. Few heterosis studies have been done in soybean [Glycine max (L.) Merr.]. This is because manual cross-pollination is difficult and time-consuming, and not economical to produce large quantities of hybrid seed. Male-sterility systems identified in soybean, combined with insect-mediated cross-pollination, have been shown to produce large quantities of hybrid seed. This procedure was used in this study to produce hybrid seed for replicated yield trials with the objectives to: 1) evaluate the agronomic performance of soybean F1 hybrids; and 2) estimate heterosis for yield and other agronomic traits of the F1 hybrids. Parental genotypes were two male-sterile, female-fertile lines with the ms3 and ms9 mutations, and a group of six high-yielding male-parent lines. The experiment was conducted in two years at several locations. In 2005, twelve F1 hybrids were evaluated along with parent lines. Mid-parent heterosis (MPH) ranged from −29% to +32%, and high-parent heterosis (HPH) from −23% to +1%. In 2006, eleven hybrids were evaluated. MPH values ranged from −53% to −21%, and HPH from −66% to −35%. Seed size and seed protein content showed HPH for some combinations. For traits related to vegetative growth, such as height and lodging, positive MPH and HPH were observed. In general, depending on the year and parent combinations, there were hybrids that performed better than the mid-parent values, suggesting that heterosis was identified in soybean. Significant differences for yield between hybrids of the ms3 and ms9 groups also were observed.
| Item type | Current library | Collection | Call number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|
| Article | CIMMYT Knowledge Center: John Woolston Library | Reprints Collection | Available |
Peer-review: No - Open Access: Yes|http://www.tandfonline.com/action/journalInformation?show=aimsScope&journalCode=wcim20#.UxehIvldX2M
Heterosis is an important factor in development of hybrid cultivars. Few heterosis studies have been done in soybean [Glycine max (L.) Merr.]. This is because manual cross-pollination is difficult and time-consuming, and not economical to produce large quantities of hybrid seed. Male-sterility systems identified in soybean, combined with insect-mediated cross-pollination, have been shown to produce large quantities of hybrid seed. This procedure was used in this study to produce hybrid seed for replicated yield trials with the objectives to: 1) evaluate the agronomic performance of soybean F1 hybrids; and 2) estimate heterosis for yield and other agronomic traits of the F1 hybrids. Parental genotypes were two male-sterile, female-fertile lines with the ms3 and ms9 mutations, and a group of six high-yielding male-parent lines. The experiment was conducted in two years at several locations. In 2005, twelve F1 hybrids were evaluated along with parent lines. Mid-parent heterosis (MPH) ranged from −29% to +32%, and high-parent heterosis (HPH) from −23% to +1%. In 2006, eleven hybrids were evaluated. MPH values ranged from −53% to −21%, and HPH from −66% to −35%. Seed size and seed protein content showed HPH for some combinations. For traits related to vegetative growth, such as height and lodging, positive MPH and HPH were observed. In general, depending on the year and parent combinations, there were hybrids that performed better than the mid-parent values, suggesting that heterosis was identified in soybean. Significant differences for yield between hybrids of the ms3 and ms9 groups also were observed.
English
Carelia Juarez
Reprints Collection