Oryza sativa and O.glaberrima,commonly known as Asian and African cultivated rice,are two domesticated rice species in Oryza genus.Asian cultivated rice may produce higher yields with better quality,whereas African cu...Oryza sativa and O.glaberrima,commonly known as Asian and African cultivated rice,are two domesticated rice species in Oryza genus.Asian cultivated rice may produce higher yields with better quality,whereas African cultivated rice shows a wide range of tolerance to abiotic and biotic stresses.Interspecific hybrids between O.sativa and O.glaberrima would show strong heterosis and thus increasing production because of their distant genetic diversity and complementary agronomic traits.However,reduced fertility is observed in hybrids from interspecific crosses;this hinders further utilization of rice heterosis in agriculture production.Such severe abnormal development of gametophytes in hybrids is caused by reproductive isolation,a process that prevents individuals of genetically diverged groups from mating,survival or producing fertile offspring.展开更多
基金supported in part by the National Natural Science Foundation of China (31771873)the National Program for Support of Top-notch Young Professionals
文摘Oryza sativa and O.glaberrima,commonly known as Asian and African cultivated rice,are two domesticated rice species in Oryza genus.Asian cultivated rice may produce higher yields with better quality,whereas African cultivated rice shows a wide range of tolerance to abiotic and biotic stresses.Interspecific hybrids between O.sativa and O.glaberrima would show strong heterosis and thus increasing production because of their distant genetic diversity and complementary agronomic traits.However,reduced fertility is observed in hybrids from interspecific crosses;this hinders further utilization of rice heterosis in agriculture production.Such severe abnormal development of gametophytes in hybrids is caused by reproductive isolation,a process that prevents individuals of genetically diverged groups from mating,survival or producing fertile offspring.
