Ladizinsky G, Adler A
Faculty of Agriculture, Hebrew University, Rehovot, Israel.
Theor Appl Genet. 1976 Jul;48(4):197-203. doi: 10.1007/BF00527371.
Genetic relationships between 7 annual species of the genus Cicer, including the cultivated chickpea, have been studied. These species were assigned to 3 crossability groups. In each group interspecific hybrids could be obtained but their fertility differed considerably in the various cross combinations. Crosses between members of different groups yielded no viable seeds. The possibility of gene transfer from the wild species to the cultivated chickpea C. arietinum was also assessed. Only two species could be considered for this purpose, C. reticulatum, which is the wild progenitor of the cultivated species, and C. echinospermum, which is in the secondary gene pool of C. arietinum. A unique postzygotic reproductive barrier mechanism was found between the members of Group II, C. judaicum, C. pinnatifidum and C. bijugum. It is based on a disharmony in the growth rate of the stigma and the anthers at the time of anthesis of the F(1) interspecific hybrid so that selfpollination is avoided. It is proposed that this kind of mechanism has been involved only when an effective spatial isolation between the three species had been obtained.
已对包括栽培鹰嘴豆在内的鹰嘴豆属7个一年生物种之间的遗传关系进行了研究。这些物种被分为3个杂交亲和性组。在每个组内都能获得种间杂种，但它们在不同杂交组合中的育性差异很大。不同组的成员之间杂交没有产生可育种子。还评估了从野生种向栽培鹰嘴豆（C. arietinum）基因转移的可能性。为此目的，仅可考虑两个物种，即栽培种的野生祖先种网脉鹰嘴豆（C. reticulatum）和处于鹰嘴豆（C. arietinum）二级基因库中的刺籽鹰嘴豆（C. echinospermum）。在第二组的成员，即犹太鹰嘴豆（C. judaicum）、羽裂鹰嘴豆（C. pinnatifidum）和双对小叶鹰嘴豆（C. bijugum）之间发现了一种独特的合子后生殖障碍机制。它基于F(1)种间杂种开花时柱头和花药生长速率的不协调，从而避免了自花授粉。有人提出，只有当这三个物种之间获得了有效的空间隔离时，才会涉及这种机制。
